/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-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:22:45,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:22:45,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:22:45,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:22:45,472 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 02:22:45,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:22:45,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:22:45,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:22:45,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:22:45,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:22:45,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:22:45,501 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:22:45,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:22:45,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:22:45,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:22:45,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:22:45,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:22:45,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:22:45,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:45,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:22:45,504 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:22:45,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:22:45,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:22:45,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:22:45,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:22:45,749 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:22:45,750 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:22:45,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl [2021-05-22 02:22:45,750 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-trans.wvr.bpl' [2021-05-22 02:22:45,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:22:45,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:22:45,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:45,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:22:45,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:22:45,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:45,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:22:45,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:22:45,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:22:45,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/1) ... [2021-05-22 02:22:45,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:22:45,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:22:45,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:22:45,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:22:45,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (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 02:22:46,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:22:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:22:46,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:22:46,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:22:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:22:46,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:22:46,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:22:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:22:46,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:22:46,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:22:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:22:46,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:22:46,029 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 02:22:46,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:22:46,730 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-22 02:22:46,731 INFO L202 PluginConnector]: Adding new model poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:46 BoogieIcfgContainer [2021-05-22 02:22:46,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:22:46,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:22:46,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:22:46,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:22:46,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:45" (1/2) ... [2021-05-22 02:22:46,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c92fdca and model type poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:22:46, skipping insertion in model container [2021-05-22 02:22:46,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:46" (2/2) ... [2021-05-22 02:22:46,739 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-trans.wvr.bpl [2021-05-22 02:22:46,746 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:22:46,746 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:22:46,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:22:46,747 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:22:46,780 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:22:46,798 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:22:46,817 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:22:46,817 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:22:46,817 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:22:46,817 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:22:46,817 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:22:46,817 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:22:46,817 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:22:46,817 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:22:46,824 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 37 transitions, 98 flow [2021-05-22 02:22:46,849 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 02:22:46,853 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 02:22:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:46,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,865 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1233644461, now seen corresponding path program 1 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 [1795725026] [2021-05-22 02:22:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,250 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 02:22:47,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795725026] [2021-05-22 02:22:47,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795725026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:47,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149982525] [2021-05-22 02:22:47,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:47,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,271 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 02:22:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,632 INFO L93 Difference]: Finished difference Result 319 states and 1217 transitions. [2021-05-22 02:22:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,634 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 02:22:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,649 INFO L225 Difference]: With dead ends: 319 [2021-05-22 02:22:47,649 INFO L226 Difference]: Without dead ends: 304 [2021-05-22 02:22:47,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-22 02:22:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 201. [2021-05-22 02:22:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 4.41) internal successors, (882), 200 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 02:22:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 882 transitions. [2021-05-22 02:22:47,698 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 882 transitions. Word has length 14 [2021-05-22 02:22:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,699 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 882 transitions. [2021-05-22 02:22:47,699 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 02:22:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 882 transitions. [2021-05-22 02:22:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:47,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:22:47,701 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2024028845, now seen corresponding path program 2 times [2021-05-22 02:22:47,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810656651] [2021-05-22 02:22:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,226 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-05-22 02:22:48,245 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 02:22:48,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810656651] [2021-05-22 02:22:48,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810656651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015906973] [2021-05-22 02:22:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,247 INFO L87 Difference]: Start difference. First operand 201 states and 882 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 02:22:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,580 INFO L93 Difference]: Finished difference Result 346 states and 1298 transitions. [2021-05-22 02:22:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:48,581 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 02:22:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,583 INFO L225 Difference]: With dead ends: 346 [2021-05-22 02:22:48,583 INFO L226 Difference]: Without dead ends: 331 [2021-05-22 02:22:48,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-22 02:22:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 212. [2021-05-22 02:22:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 4.322274881516588) internal successors, (912), 211 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 02:22:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 912 transitions. [2021-05-22 02:22:48,593 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 912 transitions. Word has length 14 [2021-05-22 02:22:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,594 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 912 transitions. [2021-05-22 02:22:48,594 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 02:22:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 912 transitions. [2021-05-22 02:22:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:48,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:22:48,595 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1840634711, now seen corresponding path program 3 times [2021-05-22 02:22:48,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201986808] [2021-05-22 02:22:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,817 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 02:22:48,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201986808] [2021-05-22 02:22:48,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201986808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:48,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995280683] [2021-05-22 02:22:48,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:48,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:48,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,818 INFO L87 Difference]: Start difference. First operand 212 states and 912 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 02:22:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:49,059 INFO L93 Difference]: Finished difference Result 378 states and 1427 transitions. [2021-05-22 02:22:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:49,059 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 02:22:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:49,061 INFO L225 Difference]: With dead ends: 378 [2021-05-22 02:22:49,061 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:22:49,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:22:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 219. [2021-05-22 02:22:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 4.330275229357798) internal successors, (944), 218 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 02:22:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 944 transitions. [2021-05-22 02:22:49,070 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 944 transitions. Word has length 14 [2021-05-22 02:22:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:49,070 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 944 transitions. [2021-05-22 02:22:49,070 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 02:22:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 944 transitions. [2021-05-22 02:22:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:49,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:49,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:49,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:22:49,071 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash -867555397, now seen corresponding path program 4 times [2021-05-22 02:22:49,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:49,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301967637] [2021-05-22 02:22:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:49,282 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 02:22:49,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:49,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301967637] [2021-05-22 02:22:49,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301967637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:49,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:49,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:49,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122822928] [2021-05-22 02:22:49,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:49,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:49,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:49,284 INFO L87 Difference]: Start difference. First operand 219 states and 944 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 02:22:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:49,560 INFO L93 Difference]: Finished difference Result 369 states and 1403 transitions. [2021-05-22 02:22:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:49,561 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 02:22:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:49,563 INFO L225 Difference]: With dead ends: 369 [2021-05-22 02:22:49,563 INFO L226 Difference]: Without dead ends: 354 [2021-05-22 02:22:49,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-22 02:22:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 231. [2021-05-22 02:22:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 4.243478260869566) internal successors, (976), 230 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 02:22:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 976 transitions. [2021-05-22 02:22:49,570 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 976 transitions. Word has length 14 [2021-05-22 02:22:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:49,570 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 976 transitions. [2021-05-22 02:22:49,570 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 02:22:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 976 transitions. [2021-05-22 02:22:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:49,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:49,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:49,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:22:49,571 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 922889575, now seen corresponding path program 5 times [2021-05-22 02:22:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:49,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073487263] [2021-05-22 02:22:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:49,771 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-22 02:22:49,800 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 02:22:49,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073487263] [2021-05-22 02:22:49,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073487263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:49,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:49,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357667347] [2021-05-22 02:22:49,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:49,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:49,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:49,802 INFO L87 Difference]: Start difference. First operand 231 states and 976 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 02:22:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,108 INFO L93 Difference]: Finished difference Result 348 states and 1312 transitions. [2021-05-22 02:22:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:50,109 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 02:22:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,111 INFO L225 Difference]: With dead ends: 348 [2021-05-22 02:22:50,111 INFO L226 Difference]: Without dead ends: 333 [2021-05-22 02:22:50,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-22 02:22:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 233. [2021-05-22 02:22:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 4.262931034482759) internal successors, (989), 232 states have internal predecessors, (989), 0 states have call successors, (0), 0 states 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 02:22:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 989 transitions. [2021-05-22 02:22:50,117 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 989 transitions. Word has length 14 [2021-05-22 02:22:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,117 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 989 transitions. [2021-05-22 02:22:50,118 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 02:22:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 989 transitions. [2021-05-22 02:22:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:50,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:22:50,119 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash 594755113, now seen corresponding path program 6 times [2021-05-22 02:22:50,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777910393] [2021-05-22 02:22:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,398 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-22 02:22:50,418 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 02:22:50,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777910393] [2021-05-22 02:22:50,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777910393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:50,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109610253] [2021-05-22 02:22:50,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:50,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:50,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:50,419 INFO L87 Difference]: Start difference. First operand 233 states and 989 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 02:22:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,707 INFO L93 Difference]: Finished difference Result 358 states and 1349 transitions. [2021-05-22 02:22:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:50,707 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 02:22:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,709 INFO L225 Difference]: With dead ends: 358 [2021-05-22 02:22:50,709 INFO L226 Difference]: Without dead ends: 343 [2021-05-22 02:22:50,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-22 02:22:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2021-05-22 02:22:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 4.262931034482759) internal successors, (989), 232 states have internal predecessors, (989), 0 states have call successors, (0), 0 states 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 02:22:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 989 transitions. [2021-05-22 02:22:50,716 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 989 transitions. Word has length 14 [2021-05-22 02:22:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,716 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 989 transitions. [2021-05-22 02:22:50,716 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 02:22:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 989 transitions. [2021-05-22 02:22:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,717 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:22:50,717 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1067380313, now seen corresponding path program 1 times [2021-05-22 02:22:50,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254002887] [2021-05-22 02:22:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,729 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 02:22:50,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254002887] [2021-05-22 02:22:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254002887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049104418] [2021-05-22 02:22:50,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,730 INFO L87 Difference]: Start difference. First operand 233 states and 989 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 02:22:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,735 INFO L93 Difference]: Finished difference Result 268 states and 1130 transitions. [2021-05-22 02:22:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,735 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 02:22:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,737 INFO L225 Difference]: With dead ends: 268 [2021-05-22 02:22:50,737 INFO L226 Difference]: Without dead ends: 268 [2021-05-22 02:22:50,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-22 02:22:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2021-05-22 02:22:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 4.2796934865900385) internal successors, (1117), 261 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 02:22:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 1117 transitions. [2021-05-22 02:22:50,743 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 1117 transitions. Word has length 15 [2021-05-22 02:22:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,743 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 1117 transitions. [2021-05-22 02:22:50,743 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 02:22:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 1117 transitions. [2021-05-22 02:22:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,744 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:22:50,744 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1654834201, now seen corresponding path program 1 times [2021-05-22 02:22:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418938855] [2021-05-22 02:22:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,755 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 02:22:50,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418938855] [2021-05-22 02:22:50,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418938855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15199439] [2021-05-22 02:22:50,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,756 INFO L87 Difference]: Start difference. First operand 262 states and 1117 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 02:22:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,770 INFO L93 Difference]: Finished difference Result 297 states and 1258 transitions. [2021-05-22 02:22:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,771 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 02:22:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,772 INFO L225 Difference]: With dead ends: 297 [2021-05-22 02:22:50,772 INFO L226 Difference]: Without dead ends: 297 [2021-05-22 02:22:50,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-22 02:22:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-05-22 02:22:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 4.25) internal successors, (1258), 296 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 1258 transitions. [2021-05-22 02:22:50,779 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 1258 transitions. Word has length 15 [2021-05-22 02:22:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,779 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 1258 transitions. [2021-05-22 02:22:50,779 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 02:22:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 1258 transitions. [2021-05-22 02:22:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:22:50,780 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2109293491, now seen corresponding path program 1 times [2021-05-22 02:22:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992906712] [2021-05-22 02:22:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,793 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 02:22:50,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992906712] [2021-05-22 02:22:50,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992906712] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614231703] [2021-05-22 02:22:50,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,794 INFO L87 Difference]: Start difference. First operand 297 states and 1258 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 02:22:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,801 INFO L93 Difference]: Finished difference Result 340 states and 1425 transitions. [2021-05-22 02:22:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,802 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 02:22:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,803 INFO L225 Difference]: With dead ends: 340 [2021-05-22 02:22:50,803 INFO L226 Difference]: Without dead ends: 340 [2021-05-22 02:22:50,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-22 02:22:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-22 02:22:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 4.2298507462686565) internal successors, (1417), 335 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states 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 02:22:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1417 transitions. [2021-05-22 02:22:50,811 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1417 transitions. Word has length 15 [2021-05-22 02:22:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,811 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1417 transitions. [2021-05-22 02:22:50,811 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 02:22:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1417 transitions. [2021-05-22 02:22:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:22:50,812 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1748926659, now seen corresponding path program 1 times [2021-05-22 02:22:50,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117750794] [2021-05-22 02:22:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,823 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 02:22:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117750794] [2021-05-22 02:22:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117750794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681955111] [2021-05-22 02:22:50,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,824 INFO L87 Difference]: Start difference. First operand 336 states and 1417 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 02:22:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,831 INFO L93 Difference]: Finished difference Result 386 states and 1608 transitions. [2021-05-22 02:22:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,832 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 02:22:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,834 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:22:50,834 INFO L226 Difference]: Without dead ends: 386 [2021-05-22 02:22:50,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-22 02:22:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-05-22 02:22:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 4.176623376623376) internal successors, (1608), 385 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 02:22:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1608 transitions. [2021-05-22 02:22:50,843 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1608 transitions. Word has length 15 [2021-05-22 02:22:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,843 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1608 transitions. [2021-05-22 02:22:50,843 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 02:22:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1608 transitions. [2021-05-22 02:22:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,844 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:22:50,844 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash 181705837, now seen corresponding path program 1 times [2021-05-22 02:22:50,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743908934] [2021-05-22 02:22:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,856 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 02:22:50,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743908934] [2021-05-22 02:22:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743908934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489686529] [2021-05-22 02:22:50,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,858 INFO L87 Difference]: Start difference. First operand 386 states and 1608 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 02:22:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,863 INFO L93 Difference]: Finished difference Result 436 states and 1799 transitions. [2021-05-22 02:22:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,864 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 02:22:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,866 INFO L225 Difference]: With dead ends: 436 [2021-05-22 02:22:50,866 INFO L226 Difference]: Without dead ends: 436 [2021-05-22 02:22:50,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-22 02:22:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2021-05-22 02:22:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 4.135632183908046) internal successors, (1799), 435 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states 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 02:22:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1799 transitions. [2021-05-22 02:22:50,875 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1799 transitions. Word has length 15 [2021-05-22 02:22:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,876 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1799 transitions. [2021-05-22 02:22:50,876 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 02:22:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1799 transitions. [2021-05-22 02:22:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:50,877 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,877 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:22:50,877 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 542072669, now seen corresponding path program 1 times [2021-05-22 02:22:50,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716543499] [2021-05-22 02:22:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,889 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 02:22:50,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716543499] [2021-05-22 02:22:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716543499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408854831] [2021-05-22 02:22:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,890 INFO L87 Difference]: Start difference. First operand 436 states and 1799 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 02:22:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,895 INFO L93 Difference]: Finished difference Result 493 states and 2014 transitions. [2021-05-22 02:22:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:50,896 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 02:22:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,898 INFO L225 Difference]: With dead ends: 493 [2021-05-22 02:22:50,898 INFO L226 Difference]: Without dead ends: 493 [2021-05-22 02:22:50,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-22 02:22:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2021-05-22 02:22:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 4.09349593495935) internal successors, (2014), 492 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states 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 02:22:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 2014 transitions. [2021-05-22 02:22:50,909 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 2014 transitions. Word has length 15 [2021-05-22 02:22:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 2014 transitions. [2021-05-22 02:22:50,909 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 02:22:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 2014 transitions. [2021-05-22 02:22:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:50,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:22:50,911 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash -85243986, now seen corresponding path program 1 times [2021-05-22 02:22:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708107830] [2021-05-22 02:22:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,941 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 02:22:50,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708107830] [2021-05-22 02:22:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708107830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:50,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:50,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:50,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075258091] [2021-05-22 02:22:50,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:50,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:50,942 INFO L87 Difference]: Start difference. First operand 493 states and 2014 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 02:22:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:51,026 INFO L93 Difference]: Finished difference Result 725 states and 2618 transitions. [2021-05-22 02:22:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:51,027 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 02:22:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:51,030 INFO L225 Difference]: With dead ends: 725 [2021-05-22 02:22:51,030 INFO L226 Difference]: Without dead ends: 698 [2021-05-22 02:22:51,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-05-22 02:22:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 544. [2021-05-22 02:22:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.955801104972376) internal successors, (2148), 543 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states 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 02:22:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 2148 transitions. [2021-05-22 02:22:51,044 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 2148 transitions. Word has length 16 [2021-05-22 02:22:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:51,044 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 2148 transitions. [2021-05-22 02:22:51,044 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 02:22:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 2148 transitions. [2021-05-22 02:22:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:51,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:51,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:51,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:22:51,045 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 705140398, now seen corresponding path program 2 times [2021-05-22 02:22:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109373715] [2021-05-22 02:22:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,077 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 02:22:51,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109373715] [2021-05-22 02:22:51,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109373715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:51,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:51,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:51,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914104203] [2021-05-22 02:22:51,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:51,078 INFO L87 Difference]: Start difference. First operand 544 states and 2148 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 02:22:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:51,156 INFO L93 Difference]: Finished difference Result 779 states and 2777 transitions. [2021-05-22 02:22:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:51,156 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 02:22:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:51,159 INFO L225 Difference]: With dead ends: 779 [2021-05-22 02:22:51,159 INFO L226 Difference]: Without dead ends: 752 [2021-05-22 02:22:51,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-05-22 02:22:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 565. [2021-05-22 02:22:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.904255319148936) internal successors, (2202), 564 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states 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 02:22:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2202 transitions. [2021-05-22 02:22:51,172 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2202 transitions. Word has length 16 [2021-05-22 02:22:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:51,173 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2202 transitions. [2021-05-22 02:22:51,173 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 02:22:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2202 transitions. [2021-05-22 02:22:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:51,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:51,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:51,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:22:51,174 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1662493965, now seen corresponding path program 1 times [2021-05-22 02:22:51,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:51,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631516580] [2021-05-22 02:22:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,237 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 02:22:51,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631516580] [2021-05-22 02:22:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631516580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56828765] [2021-05-22 02:22:51,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:51,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:51,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:51,238 INFO L87 Difference]: Start difference. First operand 565 states and 2202 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 02:22:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:51,495 INFO L93 Difference]: Finished difference Result 793 states and 2784 transitions. [2021-05-22 02:22:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:51,496 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 02:22:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:51,499 INFO L225 Difference]: With dead ends: 793 [2021-05-22 02:22:51,500 INFO L226 Difference]: Without dead ends: 766 [2021-05-22 02:22:51,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-05-22 02:22:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 612. [2021-05-22 02:22:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.7872340425531914) internal successors, (2314), 611 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states 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 02:22:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2314 transitions. [2021-05-22 02:22:51,515 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2314 transitions. Word has length 16 [2021-05-22 02:22:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:51,515 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2314 transitions. [2021-05-22 02:22:51,515 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 02:22:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2314 transitions. [2021-05-22 02:22:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:51,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:51,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:51,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:22:51,517 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1842088947, now seen corresponding path program 2 times [2021-05-22 02:22:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427617223] [2021-05-22 02:22:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,610 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 02:22:51,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427617223] [2021-05-22 02:22:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427617223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735555615] [2021-05-22 02:22:51,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:51,611 INFO L87 Difference]: Start difference. First operand 612 states and 2314 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 02:22:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:51,857 INFO L93 Difference]: Finished difference Result 847 states and 2943 transitions. [2021-05-22 02:22:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:51,858 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 02:22:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:51,861 INFO L225 Difference]: With dead ends: 847 [2021-05-22 02:22:51,861 INFO L226 Difference]: Without dead ends: 820 [2021-05-22 02:22:51,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-22 02:22:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 633. [2021-05-22 02:22:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.7468354430379747) internal successors, (2368), 632 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states 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 02:22:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2368 transitions. [2021-05-22 02:22:51,875 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2368 transitions. Word has length 16 [2021-05-22 02:22:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:51,875 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2368 transitions. [2021-05-22 02:22:51,875 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 02:22:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2368 transitions. [2021-05-22 02:22:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:51,877 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:51,877 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:51,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:22:51,877 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -881757258, now seen corresponding path program 1 times [2021-05-22 02:22:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721052833] [2021-05-22 02:22:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,916 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 02:22:51,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721052833] [2021-05-22 02:22:51,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721052833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:51,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:51,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:51,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868382315] [2021-05-22 02:22:51,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:51,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:51,917 INFO L87 Difference]: Start difference. First operand 633 states and 2368 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 02:22:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:52,032 INFO L93 Difference]: Finished difference Result 974 states and 3400 transitions. [2021-05-22 02:22:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:52,032 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 02:22:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:52,036 INFO L225 Difference]: With dead ends: 974 [2021-05-22 02:22:52,036 INFO L226 Difference]: Without dead ends: 951 [2021-05-22 02:22:52,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-22 02:22:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 641. [2021-05-22 02:22:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.7375) internal successors, (2392), 640 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 02:22:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2392 transitions. [2021-05-22 02:22:52,049 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2392 transitions. Word has length 16 [2021-05-22 02:22:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:52,049 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2392 transitions. [2021-05-22 02:22:52,049 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 02:22:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2392 transitions. [2021-05-22 02:22:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:52,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:52,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:52,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:22:52,051 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash 768619160, now seen corresponding path program 1 times [2021-05-22 02:22:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:52,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696273462] [2021-05-22 02:22:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:52,096 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 02:22:52,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696273462] [2021-05-22 02:22:52,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696273462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:52,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:52,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822968190] [2021-05-22 02:22:52,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:52,097 INFO L87 Difference]: Start difference. First operand 641 states and 2392 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 02:22:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:52,245 INFO L93 Difference]: Finished difference Result 965 states and 3345 transitions. [2021-05-22 02:22:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:52,245 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 02:22:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:52,249 INFO L225 Difference]: With dead ends: 965 [2021-05-22 02:22:52,249 INFO L226 Difference]: Without dead ends: 936 [2021-05-22 02:22:52,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-22 02:22:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 645. [2021-05-22 02:22:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.732919254658385) internal successors, (2404), 644 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states 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 02:22:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2404 transitions. [2021-05-22 02:22:52,262 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2404 transitions. Word has length 16 [2021-05-22 02:22:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:52,262 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2404 transitions. [2021-05-22 02:22:52,262 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 02:22:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2404 transitions. [2021-05-22 02:22:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:52,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:52,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:52,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:22:52,263 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1488759573, now seen corresponding path program 1 times [2021-05-22 02:22:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:52,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324393205] [2021-05-22 02:22:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:52,372 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 02:22:52,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:52,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324393205] [2021-05-22 02:22:52,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324393205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:52,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:52,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:52,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786066784] [2021-05-22 02:22:52,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:52,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:52,374 INFO L87 Difference]: Start difference. First operand 645 states and 2404 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 02:22:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:52,574 INFO L93 Difference]: Finished difference Result 1001 states and 3467 transitions. [2021-05-22 02:22:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:52,574 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 02:22:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:52,578 INFO L225 Difference]: With dead ends: 1001 [2021-05-22 02:22:52,578 INFO L226 Difference]: Without dead ends: 978 [2021-05-22 02:22:52,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-05-22 02:22:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 653. [2021-05-22 02:22:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.723926380368098) internal successors, (2428), 652 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states 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 02:22:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2428 transitions. [2021-05-22 02:22:52,605 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2428 transitions. Word has length 16 [2021-05-22 02:22:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:52,605 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 2428 transitions. [2021-05-22 02:22:52,605 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 02:22:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2428 transitions. [2021-05-22 02:22:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:52,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:52,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:52,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:22:52,607 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 185156587, now seen corresponding path program 1 times [2021-05-22 02:22:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303571716] [2021-05-22 02:22:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:52,712 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 02:22:52,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:52,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303571716] [2021-05-22 02:22:52,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303571716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:52,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:52,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:52,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141609677] [2021-05-22 02:22:52,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:52,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:52,713 INFO L87 Difference]: Start difference. First operand 653 states and 2428 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 02:22:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:52,892 INFO L93 Difference]: Finished difference Result 972 states and 3352 transitions. [2021-05-22 02:22:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:52,892 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 02:22:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:52,896 INFO L225 Difference]: With dead ends: 972 [2021-05-22 02:22:52,896 INFO L226 Difference]: Without dead ends: 943 [2021-05-22 02:22:52,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-05-22 02:22:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 657. [2021-05-22 02:22:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7195121951219514) internal successors, (2440), 656 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states 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 02:22:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2440 transitions. [2021-05-22 02:22:52,908 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2440 transitions. Word has length 16 [2021-05-22 02:22:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:52,908 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2440 transitions. [2021-05-22 02:22:52,908 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 02:22:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2440 transitions. [2021-05-22 02:22:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:52,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:52,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:52,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:22:52,910 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1227931188, now seen corresponding path program 2 times [2021-05-22 02:22:52,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:52,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479919788] [2021-05-22 02:22:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:52,997 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 02:22:52,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479919788] [2021-05-22 02:22:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479919788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:52,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:52,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:52,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396399138] [2021-05-22 02:22:52,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:52,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:52,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:52,998 INFO L87 Difference]: Start difference. First operand 657 states and 2440 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 02:22:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:53,145 INFO L93 Difference]: Finished difference Result 1111 states and 3792 transitions. [2021-05-22 02:22:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:53,145 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 02:22:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:53,150 INFO L225 Difference]: With dead ends: 1111 [2021-05-22 02:22:53,150 INFO L226 Difference]: Without dead ends: 1088 [2021-05-22 02:22:53,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-05-22 02:22:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 657. [2021-05-22 02:22:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7195121951219514) internal successors, (2440), 656 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states 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 02:22:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2440 transitions. [2021-05-22 02:22:53,164 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2440 transitions. Word has length 16 [2021-05-22 02:22:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:53,164 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2440 transitions. [2021-05-22 02:22:53,164 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 02:22:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2440 transitions. [2021-05-22 02:22:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:53,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:53,166 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:53,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:22:53,166 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1214418261, now seen corresponding path program 2 times [2021-05-22 02:22:53,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:53,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140567901] [2021-05-22 02:22:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:53,233 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 02:22:53,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:53,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140567901] [2021-05-22 02:22:53,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140567901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:53,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:53,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927385050] [2021-05-22 02:22:53,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:53,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:53,234 INFO L87 Difference]: Start difference. First operand 657 states and 2440 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 02:22:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:53,434 INFO L93 Difference]: Finished difference Result 1170 states and 4048 transitions. [2021-05-22 02:22:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:53,434 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 02:22:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:53,439 INFO L225 Difference]: With dead ends: 1170 [2021-05-22 02:22:53,439 INFO L226 Difference]: Without dead ends: 1143 [2021-05-22 02:22:53,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-05-22 02:22:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 657. [2021-05-22 02:22:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.716463414634146) internal successors, (2438), 656 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 02:22:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2438 transitions. [2021-05-22 02:22:53,453 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2438 transitions. Word has length 16 [2021-05-22 02:22:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:53,453 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2438 transitions. [2021-05-22 02:22:53,453 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 02:22:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2438 transitions. [2021-05-22 02:22:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:53,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:53,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:53,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:22:53,455 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1866944204, now seen corresponding path program 2 times [2021-05-22 02:22:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:53,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563970802] [2021-05-22 02:22:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:53,548 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 02:22:53,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:53,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563970802] [2021-05-22 02:22:53,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563970802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:53,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:53,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:53,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595737048] [2021-05-22 02:22:53,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:53,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:53,549 INFO L87 Difference]: Start difference. First operand 657 states and 2438 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 02:22:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:53,668 INFO L93 Difference]: Finished difference Result 1084 states and 3756 transitions. [2021-05-22 02:22:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:53,669 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 02:22:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:53,682 INFO L225 Difference]: With dead ends: 1084 [2021-05-22 02:22:53,682 INFO L226 Difference]: Without dead ends: 1055 [2021-05-22 02:22:53,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-05-22 02:22:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 657. [2021-05-22 02:22:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.716463414634146) internal successors, (2438), 656 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states 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 02:22:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2438 transitions. [2021-05-22 02:22:53,699 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2438 transitions. Word has length 16 [2021-05-22 02:22:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:53,700 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2438 transitions. [2021-05-22 02:22:53,700 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 02:22:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2438 transitions. [2021-05-22 02:22:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:53,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:53,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:53,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:22:53,701 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1453708437, now seen corresponding path program 2 times [2021-05-22 02:22:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:53,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332105969] [2021-05-22 02:22:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:53,791 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 02:22:53,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:53,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332105969] [2021-05-22 02:22:53,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332105969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:53,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:53,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:53,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420794714] [2021-05-22 02:22:53,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:53,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:53,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:53,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:53,793 INFO L87 Difference]: Start difference. First operand 657 states and 2438 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 02:22:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:53,979 INFO L93 Difference]: Finished difference Result 1088 states and 3765 transitions. [2021-05-22 02:22:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:53,979 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 02:22:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:53,982 INFO L225 Difference]: With dead ends: 1088 [2021-05-22 02:22:53,982 INFO L226 Difference]: Without dead ends: 1048 [2021-05-22 02:22:53,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-05-22 02:22:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 657. [2021-05-22 02:22:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.7103658536585367) internal successors, (2434), 656 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states 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 02:22:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2434 transitions. [2021-05-22 02:22:53,995 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2434 transitions. Word has length 16 [2021-05-22 02:22:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:53,995 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2434 transitions. [2021-05-22 02:22:53,996 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 02:22:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2434 transitions. [2021-05-22 02:22:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:53,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:53,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:53,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:22:53,997 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 486403162, now seen corresponding path program 3 times [2021-05-22 02:22:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:53,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360698947] [2021-05-22 02:22:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,041 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 02:22:54,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360698947] [2021-05-22 02:22:54,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360698947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:54,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468984198] [2021-05-22 02:22:54,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:54,042 INFO L87 Difference]: Start difference. First operand 657 states and 2434 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 02:22:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:54,117 INFO L93 Difference]: Finished difference Result 869 states and 2928 transitions. [2021-05-22 02:22:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:54,117 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 02:22:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:54,119 INFO L225 Difference]: With dead ends: 869 [2021-05-22 02:22:54,119 INFO L226 Difference]: Without dead ends: 846 [2021-05-22 02:22:54,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-05-22 02:22:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 634. [2021-05-22 02:22:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.654028436018957) internal successors, (2313), 633 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states 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 02:22:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2313 transitions. [2021-05-22 02:22:54,137 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2313 transitions. Word has length 16 [2021-05-22 02:22:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:54,137 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 2313 transitions. [2021-05-22 02:22:54,137 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 02:22:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2313 transitions. [2021-05-22 02:22:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:54,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:54,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:54,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:22:54,139 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:54,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:54,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1119769510, now seen corresponding path program 4 times [2021-05-22 02:22:54,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:54,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616427481] [2021-05-22 02:22:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,183 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 02:22:54,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616427481] [2021-05-22 02:22:54,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616427481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:54,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091399932] [2021-05-22 02:22:54,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:54,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:54,184 INFO L87 Difference]: Start difference. First operand 634 states and 2313 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 02:22:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:54,264 INFO L93 Difference]: Finished difference Result 825 states and 2808 transitions. [2021-05-22 02:22:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:54,264 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 02:22:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:54,266 INFO L225 Difference]: With dead ends: 825 [2021-05-22 02:22:54,266 INFO L226 Difference]: Without dead ends: 802 [2021-05-22 02:22:54,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-05-22 02:22:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 644. [2021-05-22 02:22:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.636080870917574) internal successors, (2338), 643 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 02:22:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2338 transitions. [2021-05-22 02:22:54,278 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2338 transitions. Word has length 16 [2021-05-22 02:22:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:54,278 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 2338 transitions. [2021-05-22 02:22:54,278 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 02:22:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2338 transitions. [2021-05-22 02:22:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:54,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:54,279 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:54,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:22:54,279 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash 423749436, now seen corresponding path program 3 times [2021-05-22 02:22:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845792815] [2021-05-22 02:22:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,335 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 02:22:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845792815] [2021-05-22 02:22:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845792815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:54,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113076548] [2021-05-22 02:22:54,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:54,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:54,337 INFO L87 Difference]: Start difference. First operand 644 states and 2338 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 02:22:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:54,409 INFO L93 Difference]: Finished difference Result 815 states and 2725 transitions. [2021-05-22 02:22:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:54,409 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 02:22:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:54,411 INFO L225 Difference]: With dead ends: 815 [2021-05-22 02:22:54,411 INFO L226 Difference]: Without dead ends: 786 [2021-05-22 02:22:54,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-05-22 02:22:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 612. [2021-05-22 02:22:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.5810147299509003) internal successors, (2188), 611 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states 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 02:22:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2188 transitions. [2021-05-22 02:22:54,421 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2188 transitions. Word has length 16 [2021-05-22 02:22:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:54,421 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2188 transitions. [2021-05-22 02:22:54,424 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 02:22:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2188 transitions. [2021-05-22 02:22:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:54,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:54,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:54,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:22:54,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash 315557690, now seen corresponding path program 4 times [2021-05-22 02:22:54,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:54,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596650056] [2021-05-22 02:22:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,478 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 02:22:54,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596650056] [2021-05-22 02:22:54,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596650056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646209192] [2021-05-22 02:22:54,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:54,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:54,479 INFO L87 Difference]: Start difference. First operand 612 states and 2188 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 02:22:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:54,559 INFO L93 Difference]: Finished difference Result 803 states and 2689 transitions. [2021-05-22 02:22:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:54,560 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 02:22:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:54,561 INFO L225 Difference]: With dead ends: 803 [2021-05-22 02:22:54,561 INFO L226 Difference]: Without dead ends: 774 [2021-05-22 02:22:54,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-05-22 02:22:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 618. [2021-05-22 02:22:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.5769854132901133) internal successors, (2207), 617 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 02:22:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2207 transitions. [2021-05-22 02:22:54,572 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2207 transitions. Word has length 16 [2021-05-22 02:22:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:54,572 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 2207 transitions. [2021-05-22 02:22:54,572 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 02:22:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2207 transitions. [2021-05-22 02:22:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:54,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:54,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:54,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:22:54,573 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2014690215, now seen corresponding path program 3 times [2021-05-22 02:22:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551668206] [2021-05-22 02:22:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,672 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 02:22:54,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551668206] [2021-05-22 02:22:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551668206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894801601] [2021-05-22 02:22:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:54,673 INFO L87 Difference]: Start difference. First operand 618 states and 2207 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 02:22:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:54,876 INFO L93 Difference]: Finished difference Result 742 states and 2401 transitions. [2021-05-22 02:22:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:54,877 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 02:22:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:54,878 INFO L225 Difference]: With dead ends: 742 [2021-05-22 02:22:54,879 INFO L226 Difference]: Without dead ends: 719 [2021-05-22 02:22:54,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-05-22 02:22:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 555. [2021-05-22 02:22:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.487364620938628) internal successors, (1932), 554 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states 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 02:22:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1932 transitions. [2021-05-22 02:22:54,887 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1932 transitions. Word has length 16 [2021-05-22 02:22:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:54,888 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1932 transitions. [2021-05-22 02:22:54,888 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 02:22:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1932 transitions. [2021-05-22 02:22:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:54,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:54,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:54,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:22:54,889 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1307197767, now seen corresponding path program 4 times [2021-05-22 02:22:54,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:54,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351834692] [2021-05-22 02:22:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,941 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 02:22:54,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351834692] [2021-05-22 02:22:54,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351834692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:54,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:54,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361712049] [2021-05-22 02:22:54,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:54,942 INFO L87 Difference]: Start difference. First operand 555 states and 1932 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 02:22:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,109 INFO L93 Difference]: Finished difference Result 829 states and 2671 transitions. [2021-05-22 02:22:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:55,109 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 02:22:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,111 INFO L225 Difference]: With dead ends: 829 [2021-05-22 02:22:55,111 INFO L226 Difference]: Without dead ends: 806 [2021-05-22 02:22:55,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-05-22 02:22:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 565. [2021-05-22 02:22:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.469858156028369) internal successors, (1957), 564 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 02:22:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1957 transitions. [2021-05-22 02:22:55,121 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1957 transitions. Word has length 16 [2021-05-22 02:22:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,121 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 1957 transitions. [2021-05-22 02:22:55,121 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 02:22:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1957 transitions. [2021-05-22 02:22:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:55,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:22:55,122 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2145877403, now seen corresponding path program 3 times [2021-05-22 02:22:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075692054] [2021-05-22 02:22:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,184 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 02:22:55,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075692054] [2021-05-22 02:22:55,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075692054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:55,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:55,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230662131] [2021-05-22 02:22:55,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:55,185 INFO L87 Difference]: Start difference. First operand 565 states and 1957 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 02:22:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,298 INFO L93 Difference]: Finished difference Result 670 states and 2109 transitions. [2021-05-22 02:22:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:55,298 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 02:22:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,299 INFO L225 Difference]: With dead ends: 670 [2021-05-22 02:22:55,299 INFO L226 Difference]: Without dead ends: 641 [2021-05-22 02:22:55,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-05-22 02:22:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 499. [2021-05-22 02:22:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 3.3493975903614457) internal successors, (1668), 498 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states 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 02:22:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1668 transitions. [2021-05-22 02:22:55,307 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1668 transitions. Word has length 16 [2021-05-22 02:22:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,307 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1668 transitions. [2021-05-22 02:22:55,307 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 02:22:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1668 transitions. [2021-05-22 02:22:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:55,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:22:55,308 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1820955431, now seen corresponding path program 4 times [2021-05-22 02:22:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31525045] [2021-05-22 02:22:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,358 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 02:22:55,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31525045] [2021-05-22 02:22:55,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31525045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:55,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:55,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:55,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091007711] [2021-05-22 02:22:55,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:55,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:55,359 INFO L87 Difference]: Start difference. First operand 499 states and 1668 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 02:22:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,537 INFO L93 Difference]: Finished difference Result 674 states and 2121 transitions. [2021-05-22 02:22:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:55,537 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 02:22:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,539 INFO L225 Difference]: With dead ends: 674 [2021-05-22 02:22:55,539 INFO L226 Difference]: Without dead ends: 645 [2021-05-22 02:22:55,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-05-22 02:22:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 505. [2021-05-22 02:22:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 02:22:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-05-22 02:22:55,547 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-05-22 02:22:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-05-22 02:22:55,547 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 02:22:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-05-22 02:22:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:55,548 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:22:55,548 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash 648487496, now seen corresponding path program 3 times [2021-05-22 02:22:55,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722127987] [2021-05-22 02:22:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,609 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 02:22:55,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722127987] [2021-05-22 02:22:55,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722127987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:55,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:55,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456947552] [2021-05-22 02:22:55,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:55,610 INFO L87 Difference]: Start difference. First operand 505 states and 1687 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 02:22:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,819 INFO L93 Difference]: Finished difference Result 1060 states and 3246 transitions. [2021-05-22 02:22:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:22:55,819 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 02:22:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,821 INFO L225 Difference]: With dead ends: 1060 [2021-05-22 02:22:55,821 INFO L226 Difference]: Without dead ends: 1033 [2021-05-22 02:22:55,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:22:55,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-05-22 02:22:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 505. [2021-05-22 02:22:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 02:22:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-05-22 02:22:55,831 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-05-22 02:22:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,832 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-05-22 02:22:55,832 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 02:22:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-05-22 02:22:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:55,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:22:55,833 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash 749508455, now seen corresponding path program 3 times [2021-05-22 02:22:55,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478724168] [2021-05-22 02:22:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,982 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 02:22:55,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478724168] [2021-05-22 02:22:55,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478724168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:55,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:55,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030135996] [2021-05-22 02:22:55,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:55,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:55,983 INFO L87 Difference]: Start difference. First operand 505 states and 1687 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 02:22:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,106 INFO L93 Difference]: Finished difference Result 821 states and 2570 transitions. [2021-05-22 02:22:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:56,108 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 02:22:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,110 INFO L225 Difference]: With dead ends: 821 [2021-05-22 02:22:56,110 INFO L226 Difference]: Without dead ends: 794 [2021-05-22 02:22:56,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-05-22 02:22:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 505. [2021-05-22 02:22:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.3472222222222223) internal successors, (1687), 504 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 02:22:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1687 transitions. [2021-05-22 02:22:56,118 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1687 transitions. Word has length 16 [2021-05-22 02:22:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,118 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1687 transitions. [2021-05-22 02:22:56,118 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 02:22:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1687 transitions. [2021-05-22 02:22:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:56,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:22:56,119 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1222989368, now seen corresponding path program 5 times [2021-05-22 02:22:56,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829436464] [2021-05-22 02:22:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:56,165 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 02:22:56,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829436464] [2021-05-22 02:22:56,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829436464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:56,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:56,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:56,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895564017] [2021-05-22 02:22:56,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:56,166 INFO L87 Difference]: Start difference. First operand 505 states and 1687 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 02:22:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,281 INFO L93 Difference]: Finished difference Result 891 states and 2762 transitions. [2021-05-22 02:22:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:56,282 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 02:22:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,284 INFO L225 Difference]: With dead ends: 891 [2021-05-22 02:22:56,284 INFO L226 Difference]: Without dead ends: 862 [2021-05-22 02:22:56,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-05-22 02:22:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 494. [2021-05-22 02:22:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.36105476673428) internal successors, (1657), 493 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states 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 02:22:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1657 transitions. [2021-05-22 02:22:56,292 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1657 transitions. Word has length 16 [2021-05-22 02:22:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1657 transitions. [2021-05-22 02:22:56,293 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 02:22:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1657 transitions. [2021-05-22 02:22:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:56,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:22:56,294 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -248674713, now seen corresponding path program 5 times [2021-05-22 02:22:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173133945] [2021-05-22 02:22:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:56,357 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 02:22:56,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173133945] [2021-05-22 02:22:56,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173133945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:56,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:56,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:56,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114170567] [2021-05-22 02:22:56,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:56,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:56,358 INFO L87 Difference]: Start difference. First operand 494 states and 1657 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 02:22:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,511 INFO L93 Difference]: Finished difference Result 868 states and 2732 transitions. [2021-05-22 02:22:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:56,511 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 02:22:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,513 INFO L225 Difference]: With dead ends: 868 [2021-05-22 02:22:56,514 INFO L226 Difference]: Without dead ends: 828 [2021-05-22 02:22:56,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-05-22 02:22:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 494. [2021-05-22 02:22:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 02:22:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-05-22 02:22:56,522 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-05-22 02:22:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,522 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-05-22 02:22:56,522 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 02:22:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-05-22 02:22:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:56,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,523 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:22:56,523 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1291259644, now seen corresponding path program 6 times [2021-05-22 02:22:56,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034931483] [2021-05-22 02:22:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:56,572 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 02:22:56,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034931483] [2021-05-22 02:22:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034931483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:56,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:56,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:56,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835986000] [2021-05-22 02:22:56,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:56,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:56,573 INFO L87 Difference]: Start difference. First operand 494 states and 1652 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 02:22:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,673 INFO L93 Difference]: Finished difference Result 741 states and 2296 transitions. [2021-05-22 02:22:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:56,673 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 02:22:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,674 INFO L225 Difference]: With dead ends: 741 [2021-05-22 02:22:56,674 INFO L226 Difference]: Without dead ends: 712 [2021-05-22 02:22:56,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-05-22 02:22:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 494. [2021-05-22 02:22:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 02:22:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-05-22 02:22:56,682 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-05-22 02:22:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,682 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-05-22 02:22:56,683 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 02:22:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-05-22 02:22:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:56,683 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,683 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:22:56,684 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1392400701, now seen corresponding path program 6 times [2021-05-22 02:22:56,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105447288] [2021-05-22 02:22:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:56,804 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 02:22:56,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:56,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105447288] [2021-05-22 02:22:56,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105447288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:56,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:56,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927261266] [2021-05-22 02:22:56,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:56,805 INFO L87 Difference]: Start difference. First operand 494 states and 1652 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 02:22:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,939 INFO L93 Difference]: Finished difference Result 773 states and 2416 transitions. [2021-05-22 02:22:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:56,939 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 02:22:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,941 INFO L225 Difference]: With dead ends: 773 [2021-05-22 02:22:56,941 INFO L226 Difference]: Without dead ends: 744 [2021-05-22 02:22:56,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-05-22 02:22:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 494. [2021-05-22 02:22:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 02:22:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-05-22 02:22:56,949 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-05-22 02:22:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,949 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-05-22 02:22:56,949 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 02:22:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-05-22 02:22:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:56,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:22:56,950 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 498850876, now seen corresponding path program 4 times [2021-05-22 02:22:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059593838] [2021-05-22 02:22:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,003 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 02:22:57,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059593838] [2021-05-22 02:22:57,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059593838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:57,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:57,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246949324] [2021-05-22 02:22:57,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:57,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:57,005 INFO L87 Difference]: Start difference. First operand 494 states and 1652 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 02:22:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:57,101 INFO L93 Difference]: Finished difference Result 889 states and 2730 transitions. [2021-05-22 02:22:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:57,101 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 02:22:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:57,103 INFO L225 Difference]: With dead ends: 889 [2021-05-22 02:22:57,103 INFO L226 Difference]: Without dead ends: 862 [2021-05-22 02:22:57,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-05-22 02:22:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 494. [2021-05-22 02:22:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3509127789046653) internal successors, (1652), 493 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states 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 02:22:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1652 transitions. [2021-05-22 02:22:57,111 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1652 transitions. Word has length 16 [2021-05-22 02:22:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:57,111 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1652 transitions. [2021-05-22 02:22:57,111 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 02:22:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1652 transitions. [2021-05-22 02:22:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:57,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:57,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:22:57,112 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash 637834109, now seen corresponding path program 4 times [2021-05-22 02:22:57,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:57,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690835308] [2021-05-22 02:22:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,203 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 02:22:57,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690835308] [2021-05-22 02:22:57,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690835308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:57,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:57,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072219743] [2021-05-22 02:22:57,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:57,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:57,204 INFO L87 Difference]: Start difference. First operand 494 states and 1652 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 02:22:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:57,352 INFO L93 Difference]: Finished difference Result 863 states and 2698 transitions. [2021-05-22 02:22:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:57,353 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 02:22:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:57,354 INFO L225 Difference]: With dead ends: 863 [2021-05-22 02:22:57,354 INFO L226 Difference]: Without dead ends: 830 [2021-05-22 02:22:57,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-22 02:22:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 494. [2021-05-22 02:22:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 02:22:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-05-22 02:22:57,362 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-05-22 02:22:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:57,362 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-05-22 02:22:57,362 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 02:22:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-05-22 02:22:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:57,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:57,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:57,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:22:57,363 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1681413370, now seen corresponding path program 5 times [2021-05-22 02:22:57,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:57,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000049581] [2021-05-22 02:22:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,392 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 02:22:57,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000049581] [2021-05-22 02:22:57,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000049581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:57,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:57,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:57,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79414956] [2021-05-22 02:22:57,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:57,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:57,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:57,393 INFO L87 Difference]: Start difference. First operand 494 states and 1649 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 02:22:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:57,467 INFO L93 Difference]: Finished difference Result 731 states and 2291 transitions. [2021-05-22 02:22:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:57,467 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 02:22:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:57,468 INFO L225 Difference]: With dead ends: 731 [2021-05-22 02:22:57,468 INFO L226 Difference]: Without dead ends: 704 [2021-05-22 02:22:57,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-05-22 02:22:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 494. [2021-05-22 02:22:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 02:22:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-05-22 02:22:57,475 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-05-22 02:22:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:57,476 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-05-22 02:22:57,476 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 02:22:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-05-22 02:22:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:57,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:57,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:57,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:22:57,477 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1580392411, now seen corresponding path program 5 times [2021-05-22 02:22:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135041593] [2021-05-22 02:22:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,584 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 02:22:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135041593] [2021-05-22 02:22:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135041593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:57,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:57,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:57,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380047004] [2021-05-22 02:22:57,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:57,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:57,585 INFO L87 Difference]: Start difference. First operand 494 states and 1649 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 02:22:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:57,838 INFO L93 Difference]: Finished difference Result 731 states and 2291 transitions. [2021-05-22 02:22:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:57,838 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 02:22:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:57,839 INFO L225 Difference]: With dead ends: 731 [2021-05-22 02:22:57,839 INFO L226 Difference]: Without dead ends: 704 [2021-05-22 02:22:57,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-05-22 02:22:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 494. [2021-05-22 02:22:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 3.3448275862068964) internal successors, (1649), 493 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 02:22:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1649 transitions. [2021-05-22 02:22:57,847 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1649 transitions. Word has length 16 [2021-05-22 02:22:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:57,847 INFO L482 AbstractCegarLoop]: Abstraction has 494 states and 1649 transitions. [2021-05-22 02:22:57,847 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 02:22:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1649 transitions. [2021-05-22 02:22:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:57,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:57,848 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:57,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:22:57,848 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 784334086, now seen corresponding path program 5 times [2021-05-22 02:22:57,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:57,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544897729] [2021-05-22 02:22:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,907 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 02:22:57,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544897729] [2021-05-22 02:22:57,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544897729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:57,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:57,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:57,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280709435] [2021-05-22 02:22:57,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:57,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:57,909 INFO L87 Difference]: Start difference. First operand 494 states and 1649 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 02:22:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:58,027 INFO L93 Difference]: Finished difference Result 793 states and 2506 transitions. [2021-05-22 02:22:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:58,027 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 02:22:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:58,028 INFO L225 Difference]: With dead ends: 793 [2021-05-22 02:22:58,028 INFO L226 Difference]: Without dead ends: 770 [2021-05-22 02:22:58,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-05-22 02:22:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 490. [2021-05-22 02:22:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.347648261758691) internal successors, (1637), 489 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states 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 02:22:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1637 transitions. [2021-05-22 02:22:58,041 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1637 transitions. Word has length 16 [2021-05-22 02:22:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:58,042 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1637 transitions. [2021-05-22 02:22:58,042 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 02:22:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1637 transitions. [2021-05-22 02:22:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:58,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:58,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:58,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:22:58,043 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:58,043 INFO L82 PathProgramCache]: Analyzing trace with hash 797847013, now seen corresponding path program 5 times [2021-05-22 02:22:58,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:58,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454668710] [2021-05-22 02:22:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:58,153 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 02:22:58,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454668710] [2021-05-22 02:22:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454668710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:58,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:58,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:58,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807408499] [2021-05-22 02:22:58,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:58,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:58,154 INFO L87 Difference]: Start difference. First operand 490 states and 1637 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 02:22:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:58,337 INFO L93 Difference]: Finished difference Result 803 states and 2527 transitions. [2021-05-22 02:22:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:58,337 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 02:22:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:58,338 INFO L225 Difference]: With dead ends: 803 [2021-05-22 02:22:58,338 INFO L226 Difference]: Without dead ends: 776 [2021-05-22 02:22:58,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-22 02:22:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 490. [2021-05-22 02:22:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.3435582822085887) internal successors, (1635), 489 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 02:22:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1635 transitions. [2021-05-22 02:22:58,346 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1635 transitions. Word has length 16 [2021-05-22 02:22:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:58,346 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1635 transitions. [2021-05-22 02:22:58,346 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 02:22:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1635 transitions. [2021-05-22 02:22:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:58,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:58,347 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:58,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:22:58,347 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1214532848, now seen corresponding path program 6 times [2021-05-22 02:22:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:58,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147321380] [2021-05-22 02:22:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:58,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:58,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147321380] [2021-05-22 02:22:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147321380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533709243] [2021-05-22 02:22:58,451 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 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 02:22:58,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-05-22 02:22:58,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:22:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:58,610 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:22:58,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-22 02:22:58,827 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:22:58,829 INFO L168 Benchmark]: Toolchain (without parser) took 13027.10 ms. Allocated memory was 362.8 MB in the beginning and 524.3 MB in the end (delta: 161.5 MB). Free memory was 341.0 MB in the beginning and 320.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 184.0 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:58,829 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.5 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:58,829 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.34 ms. Allocated memory is still 362.8 MB. Free memory was 341.0 MB in the beginning and 339.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:58,829 INFO L168 Benchmark]: Boogie Preprocessor took 29.85 ms. Allocated memory is still 362.8 MB. Free memory was 338.7 MB in the beginning and 336.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:58,830 INFO L168 Benchmark]: RCFGBuilder took 850.56 ms. Allocated memory is still 362.8 MB. Free memory was 336.7 MB in the beginning and 290.9 MB in the end (delta: 45.7 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:58,830 INFO L168 Benchmark]: TraceAbstraction took 12095.72 ms. Allocated memory was 362.8 MB in the beginning and 524.3 MB in the end (delta: 161.5 MB). Free memory was 289.9 MB in the beginning and 320.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 130.4 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:58,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.5 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.34 ms. Allocated memory is still 362.8 MB. Free memory was 341.0 MB in the beginning and 339.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.85 ms. Allocated memory is still 362.8 MB. Free memory was 338.7 MB in the beginning and 336.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 850.56 ms. Allocated memory is still 362.8 MB. Free memory was 336.7 MB in the beginning and 290.9 MB in the end (delta: 45.7 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 12095.72 ms. Allocated memory was 362.8 MB in the beginning and 524.3 MB in the end (delta: 161.5 MB). Free memory was 289.9 MB in the beginning and 320.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 130.4 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...