/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:07:46,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:07:46,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:07:46,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:07:46,696 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 02:07:46,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:07:46,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:07:46,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:07:46,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:07:46,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:07:46,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:07:46,727 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:07:46,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:07:46,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:07:46,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:07:46,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:07:46,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:07:46,730 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:07:46,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:07:46,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:07:46,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:07:46,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:07:46,984 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:07:46,985 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:07:46,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-05-22 02:07:46,986 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-05-22 02:07:47,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:07:47,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:07:47,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:07:47,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:07:47,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:07:47,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:07:47,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:07:47,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:07:47,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:07:47,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/1) ... [2021-05-22 02:07:47,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:07:47,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:07:47,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:07:47,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:07:47,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (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 02:07:47,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:07:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:07:47,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:07:47,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:07:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:07:47,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:07:47,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:07:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:07:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:07:47,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:07:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:07:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:07:47,094 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 02:07:47,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:07:47,210 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:07:47,211 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:07:47 BoogieIcfgContainer [2021-05-22 02:07:47,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:07:47,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:07:47,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:07:47,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:07:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:07:47" (1/2) ... [2021-05-22 02:07:47,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57548721 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:07:47, skipping insertion in model container [2021-05-22 02:07:47,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:07:47" (2/2) ... [2021-05-22 02:07:47,217 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-05-22 02:07:47,220 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:07:47,220 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:07:47,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:07:47,221 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:07:47,256 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:07:47,270 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:07:47,288 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:07:47,288 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:07:47,288 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:07:47,288 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:07:47,288 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:07:47,289 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:07:47,289 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:07:47,289 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:07:47,294 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-22 02:07:47,311 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:07:47,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:47,330 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:47,330 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-05-22 02:07:47,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:47,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586250033] [2021-05-22 02:07:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:47,490 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 02:07:47,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:47,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586250033] [2021-05-22 02:07:47,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586250033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:47,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:47,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:07:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677583489] [2021-05-22 02:07:47,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:07:47,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:07:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:07:47,505 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 02:07:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:47,550 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-22 02:07:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:07:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 02:07:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:47,566 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:07:47,566 INFO L226 Difference]: Without dead ends: 199 [2021-05-22 02:07:47,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:07:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-22 02:07:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-05-22 02:07:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-05-22 02:07:47,622 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-05-22 02:07:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:47,623 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-05-22 02:07:47,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 02:07:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-05-22 02:07:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:47,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:47,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:47,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:07:47,625 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:47,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:47,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-05-22 02:07:47,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:47,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385029085] [2021-05-22 02:07:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:47,703 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 02:07:47,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385029085] [2021-05-22 02:07:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385029085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:47,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403462915] [2021-05-22 02:07:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:07:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:47,897 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 02:07:47,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403462915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:47,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:47,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-05-22 02:07:47,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304919657] [2021-05-22 02:07:47,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:07:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:07:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:07:47,900 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:48,116 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-05-22 02:07:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:07:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:48,123 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:07:48,123 INFO L226 Difference]: Without dead ends: 468 [2021-05-22 02:07:48,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:07:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-22 02:07:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-05-22 02:07:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-05-22 02:07:48,137 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-05-22 02:07:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:48,137 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-05-22 02:07:48,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-05-22 02:07:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:48,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:48,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:48,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:07:48,339 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-05-22 02:07:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728978812] [2021-05-22 02:07:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:48,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:48,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728978812] [2021-05-22 02:07:48,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728978812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:48,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:48,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:07:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26809341] [2021-05-22 02:07:48,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:07:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:07:48,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:07:48,379 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:48,418 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-05-22 02:07:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:07:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:48,427 INFO L225 Difference]: With dead ends: 283 [2021-05-22 02:07:48,427 INFO L226 Difference]: Without dead ends: 283 [2021-05-22 02:07:48,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-22 02:07:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-05-22 02:07:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-05-22 02:07:48,441 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-05-22 02:07:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:48,441 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-05-22 02:07:48,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-05-22 02:07:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:48,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:48,442 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:48,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:07:48,442 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-05-22 02:07:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:48,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470616456] [2021-05-22 02:07:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:48,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:48,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470616456] [2021-05-22 02:07:48,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470616456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:48,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:48,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:48,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334768886] [2021-05-22 02:07:48,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:48,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:48,498 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:48,535 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-05-22 02:07:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:07:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:48,538 INFO L225 Difference]: With dead ends: 339 [2021-05-22 02:07:48,538 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:07:48,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:07:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:07:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-05-22 02:07:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-05-22 02:07:48,550 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-05-22 02:07:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:48,551 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-05-22 02:07:48,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-05-22 02:07:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:48,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:48,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:48,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:07:48,557 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-05-22 02:07:48,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:48,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189543674] [2021-05-22 02:07:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:48,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:48,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189543674] [2021-05-22 02:07:48,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189543674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:48,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:48,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:48,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548760196] [2021-05-22 02:07:48,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:48,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:48,607 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:48,689 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-05-22 02:07:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:07:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:48,691 INFO L225 Difference]: With dead ends: 253 [2021-05-22 02:07:48,691 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:07:48,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:07:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-05-22 02:07:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-05-22 02:07:48,696 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-05-22 02:07:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:48,696 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-05-22 02:07:48,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-05-22 02:07:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:48,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:48,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:48,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:07:48,697 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-05-22 02:07:48,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:48,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038677631] [2021-05-22 02:07:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:48,722 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 02:07:48,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:48,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038677631] [2021-05-22 02:07:48,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038677631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:48,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046829524] [2021-05-22 02:07:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:48,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:07:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:07:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:48,843 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 02:07:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046829524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-05-22 02:07:48,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030991559] [2021-05-22 02:07:48,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:07:48,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:07:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:07:48,845 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:49,091 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-05-22 02:07:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:07:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:49,094 INFO L225 Difference]: With dead ends: 429 [2021-05-22 02:07:49,094 INFO L226 Difference]: Without dead ends: 429 [2021-05-22 02:07:49,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:07:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-22 02:07:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-05-22 02:07:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-05-22 02:07:49,100 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-05-22 02:07:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:49,100 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-05-22 02:07:49,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-05-22 02:07:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:49,101 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:49,101 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:49,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:49,309 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-05-22 02:07:49,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:49,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698573887] [2021-05-22 02:07:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:49,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698573887] [2021-05-22 02:07:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698573887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:49,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:49,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882863746] [2021-05-22 02:07:49,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:49,341 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:49,391 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-05-22 02:07:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:07:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:49,392 INFO L225 Difference]: With dead ends: 300 [2021-05-22 02:07:49,392 INFO L226 Difference]: Without dead ends: 296 [2021-05-22 02:07:49,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:07:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-22 02:07:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-05-22 02:07:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-05-22 02:07:49,397 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-05-22 02:07:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:49,397 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-05-22 02:07:49,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-05-22 02:07:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:49,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:49,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:49,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:07:49,398 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:49,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-05-22 02:07:49,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:49,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819228946] [2021-05-22 02:07:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:49,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819228946] [2021-05-22 02:07:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819228946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:49,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:49,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119647843] [2021-05-22 02:07:49,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:49,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:49,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:49,422 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:49,507 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-05-22 02:07:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:07:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:49,508 INFO L225 Difference]: With dead ends: 305 [2021-05-22 02:07:49,508 INFO L226 Difference]: Without dead ends: 294 [2021-05-22 02:07:49,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-22 02:07:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-05-22 02:07:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-05-22 02:07:49,513 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-05-22 02:07:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:49,514 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-05-22 02:07:49,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-05-22 02:07:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:49,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:49,514 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:49,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:07:49,514 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-05-22 02:07:49,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:49,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796814170] [2021-05-22 02:07:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:49,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:49,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796814170] [2021-05-22 02:07:49,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796814170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:49,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:49,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:49,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813217774] [2021-05-22 02:07:49,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:49,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:49,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:49,536 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:49,622 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-05-22 02:07:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:07:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:49,623 INFO L225 Difference]: With dead ends: 285 [2021-05-22 02:07:49,623 INFO L226 Difference]: Without dead ends: 285 [2021-05-22 02:07:49,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-22 02:07:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-05-22 02:07:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-05-22 02:07:49,628 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-05-22 02:07:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:49,628 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-05-22 02:07:49,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-05-22 02:07:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:49,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:49,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:49,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:07:49,629 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-05-22 02:07:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:49,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758064543] [2021-05-22 02:07:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:49,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758064543] [2021-05-22 02:07:49,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758064543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:07:49,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:07:49,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:07:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311349359] [2021-05-22 02:07:49,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:07:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:07:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:07:49,668 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:49,713 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-05-22 02:07:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:07:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:49,715 INFO L225 Difference]: With dead ends: 251 [2021-05-22 02:07:49,715 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:07:49,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:07:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:07:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-05-22 02:07:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-05-22 02:07:49,720 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-05-22 02:07:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:49,720 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-05-22 02:07:49,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-05-22 02:07:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:49,720 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:49,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:49,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:07:49,721 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-05-22 02:07:49,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:49,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912677546] [2021-05-22 02:07:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:49,760 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 02:07:49,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912677546] [2021-05-22 02:07:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912677546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169816005] [2021-05-22 02:07:49,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:49,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:07:49,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:07:49,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:49,911 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 02:07:49,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169816005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:49,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:49,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:07:49,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298493762] [2021-05-22 02:07:49,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:07:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:07:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:49,913 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:50,082 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-05-22 02:07:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:07:50,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:50,084 INFO L225 Difference]: With dead ends: 357 [2021-05-22 02:07:50,084 INFO L226 Difference]: Without dead ends: 357 [2021-05-22 02:07:50,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:07:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-22 02:07:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-05-22 02:07:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-05-22 02:07:50,089 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-05-22 02:07:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:50,089 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-05-22 02:07:50,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-05-22 02:07:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:07:50,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:50,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:50,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-22 02:07:50,305 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-05-22 02:07:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:50,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758337425] [2021-05-22 02:07:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:50,341 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 02:07:50,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:50,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758337425] [2021-05-22 02:07:50,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758337425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:50,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239315774] [2021-05-22 02:07:50,341 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:50,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:07:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:07:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:50,442 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 02:07:50,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239315774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:50,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:50,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:07:50,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705519218] [2021-05-22 02:07:50,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:07:50,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:07:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:50,444 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:50,599 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-05-22 02:07:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:07:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:07:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:50,600 INFO L225 Difference]: With dead ends: 311 [2021-05-22 02:07:50,601 INFO L226 Difference]: Without dead ends: 311 [2021-05-22 02:07:50,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:07:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-22 02:07:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-05-22 02:07:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-05-22 02:07:50,605 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-05-22 02:07:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:50,605 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-05-22 02:07:50,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-05-22 02:07:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:07:50,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:50,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:50,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:50,823 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-05-22 02:07:50,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:50,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437023474] [2021-05-22 02:07:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:50,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437023474] [2021-05-22 02:07:50,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437023474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802189412] [2021-05-22 02:07:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:07:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:50,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802189412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:50,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:50,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:07:50,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310778064] [2021-05-22 02:07:50,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:07:50,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:07:50,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:50,953 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:51,020 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-05-22 02:07:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:07:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:07:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:51,022 INFO L225 Difference]: With dead ends: 554 [2021-05-22 02:07:51,022 INFO L226 Difference]: Without dead ends: 524 [2021-05-22 02:07:51,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:07:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-22 02:07:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-05-22 02:07:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-05-22 02:07:51,029 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-05-22 02:07:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:51,029 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-05-22 02:07:51,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-05-22 02:07:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:07:51,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:51,030 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:51,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-22 02:07:51,245 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-05-22 02:07:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:51,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581975361] [2021-05-22 02:07:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:51,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581975361] [2021-05-22 02:07:51,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581975361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:51,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305313513] [2021-05-22 02:07:51,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:51,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:07:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:07:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:51,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305313513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:51,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:51,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:07:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858317179] [2021-05-22 02:07:51,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:07:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:07:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:07:51,391 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:51,462 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-05-22 02:07:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:07:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:07:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:51,465 INFO L225 Difference]: With dead ends: 707 [2021-05-22 02:07:51,465 INFO L226 Difference]: Without dead ends: 662 [2021-05-22 02:07:51,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:07:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-22 02:07:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-05-22 02:07:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-05-22 02:07:51,474 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-05-22 02:07:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:51,475 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-05-22 02:07:51,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-05-22 02:07:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:51,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:51,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:51,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:51,695 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-05-22 02:07:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:51,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819804643] [2021-05-22 02:07:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:51,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:51,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819804643] [2021-05-22 02:07:51,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819804643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:51,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426877419] [2021-05-22 02:07:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:51,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:07:51,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:07:51,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:51,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426877419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:51,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:51,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:07:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10534299] [2021-05-22 02:07:51,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:07:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:07:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:07:51,842 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:52,072 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-05-22 02:07:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:07:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:52,076 INFO L225 Difference]: With dead ends: 1001 [2021-05-22 02:07:52,076 INFO L226 Difference]: Without dead ends: 1001 [2021-05-22 02:07:52,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:07:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-05-22 02:07:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-05-22 02:07:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-05-22 02:07:52,093 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-05-22 02:07:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:52,094 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-05-22 02:07:52,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-05-22 02:07:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:52,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:52,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:52,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:07:52,309 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-05-22 02:07:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:52,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232972103] [2021-05-22 02:07:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:52,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:52,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232972103] [2021-05-22 02:07:52,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232972103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:52,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871504331] [2021-05-22 02:07:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:07:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:52,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871504331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:52,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:52,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:07:52,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288961498] [2021-05-22 02:07:52,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:07:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:07:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:07:52,473 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:52,838 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-05-22 02:07:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:07:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:52,843 INFO L225 Difference]: With dead ends: 1180 [2021-05-22 02:07:52,843 INFO L226 Difference]: Without dead ends: 1180 [2021-05-22 02:07:52,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:07:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-05-22 02:07:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-05-22 02:07:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-05-22 02:07:52,859 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-05-22 02:07:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:52,859 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-05-22 02:07:52,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-05-22 02:07:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:52,860 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:52,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:53,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:07:53,070 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-05-22 02:07:53,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:53,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499738093] [2021-05-22 02:07:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:53,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499738093] [2021-05-22 02:07:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499738093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369784021] [2021-05-22 02:07:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:53,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:07:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:53,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:53,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369784021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:53,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:53,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:53,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697550861] [2021-05-22 02:07:53,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:53,226 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:53,558 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-05-22 02:07:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:07:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:53,562 INFO L225 Difference]: With dead ends: 1002 [2021-05-22 02:07:53,562 INFO L226 Difference]: Without dead ends: 977 [2021-05-22 02:07:53,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:07:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-22 02:07:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-05-22 02:07:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-05-22 02:07:53,576 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-05-22 02:07:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:53,576 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-05-22 02:07:53,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-05-22 02:07:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:53,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:53,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:53,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:07:53,785 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-05-22 02:07:53,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:53,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953019029] [2021-05-22 02:07:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:53,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953019029] [2021-05-22 02:07:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953019029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491068033] [2021-05-22 02:07:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:53,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:07:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491068033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:53,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:53,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:53,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692111236] [2021-05-22 02:07:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:53,937 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:54,681 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-05-22 02:07:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:07:54,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:54,688 INFO L225 Difference]: With dead ends: 1926 [2021-05-22 02:07:54,688 INFO L226 Difference]: Without dead ends: 1926 [2021-05-22 02:07:54,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:07:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-22 02:07:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-05-22 02:07:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-05-22 02:07:54,712 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-05-22 02:07:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:54,712 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-05-22 02:07:54,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-05-22 02:07:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:54,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:54,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:54,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:07:54,927 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-05-22 02:07:54,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:54,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499091091] [2021-05-22 02:07:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:54,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:54,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499091091] [2021-05-22 02:07:54,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499091091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:54,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454830775] [2021-05-22 02:07:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:54,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:07:54,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:07:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:55,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454830775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:55,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:55,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:07:55,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696703392] [2021-05-22 02:07:55,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:07:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:07:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:07:55,072 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:55,463 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-05-22 02:07:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:07:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:55,474 INFO L225 Difference]: With dead ends: 2526 [2021-05-22 02:07:55,474 INFO L226 Difference]: Without dead ends: 2518 [2021-05-22 02:07:55,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:07:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-05-22 02:07:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-05-22 02:07:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-05-22 02:07:55,510 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-05-22 02:07:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:55,510 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-05-22 02:07:55,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-05-22 02:07:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:55,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:55,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:55,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:55,726 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-05-22 02:07:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:55,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877969880] [2021-05-22 02:07:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:55,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:55,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877969880] [2021-05-22 02:07:55,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877969880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:55,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400435357] [2021-05-22 02:07:55,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:55,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:07:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:07:55,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:55,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400435357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:55,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:55,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:07:55,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218694870] [2021-05-22 02:07:55,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:07:55,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:55,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:07:55,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:07:55,871 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:56,204 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-05-22 02:07:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:07:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:56,213 INFO L225 Difference]: With dead ends: 2671 [2021-05-22 02:07:56,213 INFO L226 Difference]: Without dead ends: 2671 [2021-05-22 02:07:56,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:07:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-05-22 02:07:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-05-22 02:07:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-05-22 02:07:56,241 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-05-22 02:07:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:56,241 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-05-22 02:07:56,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-05-22 02:07:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:56,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:56,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:56,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:56,454 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-05-22 02:07:56,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:56,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735389141] [2021-05-22 02:07:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:56,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735389141] [2021-05-22 02:07:56,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735389141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473833709] [2021-05-22 02:07:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:56,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:07:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:56,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473833709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:56,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:56,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:56,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260554103] [2021-05-22 02:07:56,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:56,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:56,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:56,623 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:57,130 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-05-22 02:07:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:07:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:57,134 INFO L225 Difference]: With dead ends: 1993 [2021-05-22 02:07:57,134 INFO L226 Difference]: Without dead ends: 1972 [2021-05-22 02:07:57,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:07:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-05-22 02:07:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-05-22 02:07:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-05-22 02:07:57,165 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-05-22 02:07:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:57,165 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-05-22 02:07:57,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-05-22 02:07:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:57,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:57,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:57,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-22 02:07:57,373 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-05-22 02:07:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:57,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328162997] [2021-05-22 02:07:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:57,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:57,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328162997] [2021-05-22 02:07:57,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328162997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:57,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846895200] [2021-05-22 02:07:57,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:57,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846895200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:57,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:57,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634238743] [2021-05-22 02:07:57,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:57,521 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:57,909 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-05-22 02:07:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:07:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:57,912 INFO L225 Difference]: With dead ends: 1381 [2021-05-22 02:07:57,912 INFO L226 Difference]: Without dead ends: 1356 [2021-05-22 02:07:57,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:07:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-05-22 02:07:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-05-22 02:07:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-05-22 02:07:57,931 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-05-22 02:07:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:57,931 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-05-22 02:07:57,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-05-22 02:07:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:57,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:57,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:58,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:58,149 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-05-22 02:07:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:58,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405600308] [2021-05-22 02:07:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:58,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:58,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405600308] [2021-05-22 02:07:58,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405600308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:58,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49455733] [2021-05-22 02:07:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:58,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:07:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:58,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49455733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:58,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:58,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:58,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428109196] [2021-05-22 02:07:58,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:58,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:58,317 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:07:59,000 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-05-22 02:07:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:07:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:07:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:07:59,005 INFO L225 Difference]: With dead ends: 1755 [2021-05-22 02:07:59,005 INFO L226 Difference]: Without dead ends: 1734 [2021-05-22 02:07:59,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:07:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-22 02:07:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-05-22 02:07:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-05-22 02:07:59,054 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-05-22 02:07:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:07:59,054 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-05-22 02:07:59,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-05-22 02:07:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:07:59,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:07:59,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:07:59,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-22 02:07:59,286 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:07:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:07:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-05-22 02:07:59,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:07:59,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828283086] [2021-05-22 02:07:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:07:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:07:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:59,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:07:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828283086] [2021-05-22 02:07:59,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828283086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189104403] [2021-05-22 02:07:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:07:59,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:07:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:07:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:07:59,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:07:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:07:59,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189104403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:07:59,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:07:59,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:07:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883599643] [2021-05-22 02:07:59,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:07:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:07:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:07:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:07:59,446 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:07:59,833 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-22 02:08:00,273 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-05-22 02:08:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:00,876 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-05-22 02:08:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:08:00,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:00,879 INFO L225 Difference]: With dead ends: 1827 [2021-05-22 02:08:00,879 INFO L226 Difference]: Without dead ends: 1827 [2021-05-22 02:08:00,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:08:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-05-22 02:08:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-05-22 02:08:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-05-22 02:08:00,901 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-05-22 02:08:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:00,901 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-05-22 02:08:00,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-05-22 02:08:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:00,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:00,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:01,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:01,119 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:01,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-05-22 02:08:01,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:01,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035705218] [2021-05-22 02:08:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035705218] [2021-05-22 02:08:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035705218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870910728] [2021-05-22 02:08:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:01,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:01,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:01,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870910728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:01,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:01,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-22 02:08:01,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372180984] [2021-05-22 02:08:01,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:08:01,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:01,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:08:01,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:08:01,814 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:02,000 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-05-22 02:08:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:08:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:02,003 INFO L225 Difference]: With dead ends: 1785 [2021-05-22 02:08:02,004 INFO L226 Difference]: Without dead ends: 1777 [2021-05-22 02:08:02,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:08:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-05-22 02:08:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-05-22 02:08:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-05-22 02:08:02,067 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-05-22 02:08:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:02,068 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-05-22 02:08:02,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-05-22 02:08:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:02,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:02,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-22 02:08:02,300 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-05-22 02:08:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939707709] [2021-05-22 02:08:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:02,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:02,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939707709] [2021-05-22 02:08:02,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939707709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:02,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938335865] [2021-05-22 02:08:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:02,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:02,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938335865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:02,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:02,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:02,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016962247] [2021-05-22 02:08:02,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:02,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:02,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:02,455 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:03,373 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-05-22 02:08:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:08:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:03,402 INFO L225 Difference]: With dead ends: 2577 [2021-05-22 02:08:03,403 INFO L226 Difference]: Without dead ends: 2577 [2021-05-22 02:08:03,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 674.0ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:08:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-05-22 02:08:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-05-22 02:08:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-05-22 02:08:03,449 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-05-22 02:08:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:03,449 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-05-22 02:08:03,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-05-22 02:08:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:03,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:03,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:03,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-22 02:08:03,667 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-05-22 02:08:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:03,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473188671] [2021-05-22 02:08:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:03,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473188671] [2021-05-22 02:08:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473188671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466469028] [2021-05-22 02:08:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:03,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:08:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466469028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:03,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:03,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:03,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398149576] [2021-05-22 02:08:03,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:03,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:03,873 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:04,357 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-22 02:08:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:05,362 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-05-22 02:08:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:08:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:05,366 INFO L225 Difference]: With dead ends: 2270 [2021-05-22 02:08:05,366 INFO L226 Difference]: Without dead ends: 2249 [2021-05-22 02:08:05,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 899.5ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:08:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-05-22 02:08:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-05-22 02:08:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-05-22 02:08:05,396 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-05-22 02:08:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:05,396 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-05-22 02:08:05,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-05-22 02:08:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:05,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:05,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:05,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:08:05,605 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-05-22 02:08:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696128369] [2021-05-22 02:08:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:05,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696128369] [2021-05-22 02:08:05,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696128369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731430057] [2021-05-22 02:08:05,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731430057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:05,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:05,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409536500] [2021-05-22 02:08:05,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:05,853 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:06,981 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-05-22 02:08:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:08:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:06,987 INFO L225 Difference]: With dead ends: 2820 [2021-05-22 02:08:06,987 INFO L226 Difference]: Without dead ends: 2820 [2021-05-22 02:08:06,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:08:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-05-22 02:08:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-05-22 02:08:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-05-22 02:08:07,034 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-05-22 02:08:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:07,035 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-05-22 02:08:07,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-05-22 02:08:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:07,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:07,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:07,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:08:07,273 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-05-22 02:08:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:07,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950771949] [2021-05-22 02:08:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:07,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950771949] [2021-05-22 02:08:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950771949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477232323] [2021-05-22 02:08:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:07,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:07,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:07,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477232323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:07,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:07,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:07,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949117699] [2021-05-22 02:08:07,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:07,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:07,610 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:08,434 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-05-22 02:08:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:08:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:08,438 INFO L225 Difference]: With dead ends: 2539 [2021-05-22 02:08:08,438 INFO L226 Difference]: Without dead ends: 2539 [2021-05-22 02:08:08,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:08:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-05-22 02:08:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-05-22 02:08:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-05-22 02:08:08,464 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-05-22 02:08:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:08,464 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-05-22 02:08:08,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-05-22 02:08:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:08,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:08,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:08,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:08:08,681 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-05-22 02:08:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:08,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504183952] [2021-05-22 02:08:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:08,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:08,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504183952] [2021-05-22 02:08:08,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504183952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:08,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136396589] [2021-05-22 02:08:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:08,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:08:08,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136396589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:08,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096548892] [2021-05-22 02:08:08,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:08,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:08,903 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:09,472 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-05-22 02:08:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:08:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:09,476 INFO L225 Difference]: With dead ends: 2197 [2021-05-22 02:08:09,476 INFO L226 Difference]: Without dead ends: 2176 [2021-05-22 02:08:09,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:08:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-22 02:08:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-05-22 02:08:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-05-22 02:08:09,498 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-05-22 02:08:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:09,498 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-05-22 02:08:09,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-05-22 02:08:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:09,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:09,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:09,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:09,716 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-05-22 02:08:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073674882] [2021-05-22 02:08:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:09,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:09,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073674882] [2021-05-22 02:08:09,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073674882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:09,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56730796] [2021-05-22 02:08:09,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:09,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:09,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:09,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56730796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:09,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:09,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298143102] [2021-05-22 02:08:09,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:09,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:09,887 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:10,784 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-05-22 02:08:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:08:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:10,802 INFO L225 Difference]: With dead ends: 2278 [2021-05-22 02:08:10,802 INFO L226 Difference]: Without dead ends: 2278 [2021-05-22 02:08:10,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:08:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-05-22 02:08:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-05-22 02:08:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-05-22 02:08:10,856 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-05-22 02:08:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:10,856 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-05-22 02:08:10,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-05-22 02:08:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:10,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:10,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:11,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-22 02:08:11,074 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-05-22 02:08:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:11,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639806326] [2021-05-22 02:08:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:11,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639806326] [2021-05-22 02:08:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639806326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119367008] [2021-05-22 02:08:11,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:11,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:08:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:08:11,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119367008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:11,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:11,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:08:11,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559202872] [2021-05-22 02:08:11,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:08:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:08:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:08:11,193 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:11,385 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-05-22 02:08:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:08:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:11,389 INFO L225 Difference]: With dead ends: 2607 [2021-05-22 02:08:11,389 INFO L226 Difference]: Without dead ends: 2607 [2021-05-22 02:08:11,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:08:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-05-22 02:08:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-05-22 02:08:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-05-22 02:08:11,470 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-05-22 02:08:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:11,470 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-05-22 02:08:11,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-05-22 02:08:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:11,472 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:11,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:11,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:11,688 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-05-22 02:08:11,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:11,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014208746] [2021-05-22 02:08:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:08:11,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:11,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014208746] [2021-05-22 02:08:11,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014208746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:11,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992873915] [2021-05-22 02:08:11,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:11,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:08:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:08:11,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992873915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:11,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:11,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-22 02:08:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929721600] [2021-05-22 02:08:11,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:08:11,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:08:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:08:11,780 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:11,883 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-05-22 02:08:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:08:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:11,886 INFO L225 Difference]: With dead ends: 2392 [2021-05-22 02:08:11,886 INFO L226 Difference]: Without dead ends: 2384 [2021-05-22 02:08:11,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:08:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-22 02:08:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-05-22 02:08:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-05-22 02:08:11,912 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-05-22 02:08:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:11,912 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-05-22 02:08:11,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-05-22 02:08:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:11,914 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:11,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:12,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-22 02:08:12,130 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-05-22 02:08:12,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:12,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083628523] [2021-05-22 02:08:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:12,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083628523] [2021-05-22 02:08:12,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083628523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:12,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883308922] [2021-05-22 02:08:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883308922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:12,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:12,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-05-22 02:08:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489805891] [2021-05-22 02:08:12,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:08:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:08:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:08:12,294 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:12,440 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-05-22 02:08:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:08:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:12,444 INFO L225 Difference]: With dead ends: 2370 [2021-05-22 02:08:12,444 INFO L226 Difference]: Without dead ends: 2348 [2021-05-22 02:08:12,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-05-22 02:08:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-05-22 02:08:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-05-22 02:08:12,472 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-05-22 02:08:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:12,472 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-05-22 02:08:12,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-05-22 02:08:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:12,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:12,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:12,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-22 02:08:12,691 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:12,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-05-22 02:08:12,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:12,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901686212] [2021-05-22 02:08:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:12,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:12,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901686212] [2021-05-22 02:08:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901686212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:12,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238802219] [2021-05-22 02:08:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:12,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238802219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:12,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:12,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:12,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206542070] [2021-05-22 02:08:12,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:12,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:12,845 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:13,181 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-05-22 02:08:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:08:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:13,184 INFO L225 Difference]: With dead ends: 1877 [2021-05-22 02:08:13,184 INFO L226 Difference]: Without dead ends: 1877 [2021-05-22 02:08:13,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:08:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-05-22 02:08:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-05-22 02:08:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-05-22 02:08:13,229 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-05-22 02:08:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:13,229 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-05-22 02:08:13,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-05-22 02:08:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:13,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:13,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:13,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-22 02:08:13,448 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-05-22 02:08:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127936733] [2021-05-22 02:08:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:13,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127936733] [2021-05-22 02:08:13,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127936733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510670018] [2021-05-22 02:08:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:13,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:13,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:13,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:13,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510670018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:13,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:13,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:08:13,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215158494] [2021-05-22 02:08:13,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:08:13,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:13,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:08:13,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:08:13,579 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:13,672 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-05-22 02:08:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:08:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:13,677 INFO L225 Difference]: With dead ends: 2649 [2021-05-22 02:08:13,677 INFO L226 Difference]: Without dead ends: 2637 [2021-05-22 02:08:13,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:08:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-05-22 02:08:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-05-22 02:08:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-05-22 02:08:13,708 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-05-22 02:08:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:13,709 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-05-22 02:08:13,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-05-22 02:08:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:13,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:13,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:13,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-22 02:08:13,928 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-05-22 02:08:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750437743] [2021-05-22 02:08:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:13,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750437743] [2021-05-22 02:08:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750437743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590647658] [2021-05-22 02:08:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:13,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:08:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:14,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590647658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:14,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:14,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:14,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202257155] [2021-05-22 02:08:14,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:14,100 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:14,559 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-05-22 02:08:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:08:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:14,563 INFO L225 Difference]: With dead ends: 2373 [2021-05-22 02:08:14,563 INFO L226 Difference]: Without dead ends: 2365 [2021-05-22 02:08:14,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:08:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-05-22 02:08:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-05-22 02:08:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-05-22 02:08:14,592 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-05-22 02:08:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:14,592 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-05-22 02:08:14,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-05-22 02:08:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:14,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:14,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:14,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:08:14,811 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-05-22 02:08:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:14,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487590562] [2021-05-22 02:08:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487590562] [2021-05-22 02:08:14,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487590562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:14,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657959521] [2021-05-22 02:08:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:14,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:08:14,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657959521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:14,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:14,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-22 02:08:14,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797704900] [2021-05-22 02:08:14,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:08:14,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:14,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:08:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:08:14,909 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:15,029 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-05-22 02:08:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:08:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:15,035 INFO L225 Difference]: With dead ends: 3232 [2021-05-22 02:08:15,035 INFO L226 Difference]: Without dead ends: 3232 [2021-05-22 02:08:15,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:08:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-05-22 02:08:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-05-22 02:08:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-05-22 02:08:15,087 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-05-22 02:08:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:15,087 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-05-22 02:08:15,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-05-22 02:08:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:15,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:15,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:15,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:15,306 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-05-22 02:08:15,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:15,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192202891] [2021-05-22 02:08:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:15,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:15,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192202891] [2021-05-22 02:08:15,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192202891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:15,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884909613] [2021-05-22 02:08:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:15,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:15,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:15,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884909613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:15,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:15,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263871401] [2021-05-22 02:08:15,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:15,535 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:15,893 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-05-22 02:08:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:08:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:15,897 INFO L225 Difference]: With dead ends: 2236 [2021-05-22 02:08:15,897 INFO L226 Difference]: Without dead ends: 2222 [2021-05-22 02:08:15,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:08:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-05-22 02:08:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-05-22 02:08:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-05-22 02:08:15,925 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-05-22 02:08:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:15,925 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-05-22 02:08:15,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-05-22 02:08:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:15,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:15,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-22 02:08:16,128 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-05-22 02:08:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125048628] [2021-05-22 02:08:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:16,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125048628] [2021-05-22 02:08:16,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125048628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337995235] [2021-05-22 02:08:16,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:16,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:08:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:08:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:16,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337995235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:16,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:16,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:08:16,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654867044] [2021-05-22 02:08:16,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:08:16,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:08:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:08:16,265 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:16,476 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-05-22 02:08:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:08:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:16,481 INFO L225 Difference]: With dead ends: 3168 [2021-05-22 02:08:16,481 INFO L226 Difference]: Without dead ends: 3168 [2021-05-22 02:08:16,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:08:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-05-22 02:08:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-05-22 02:08:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-05-22 02:08:16,516 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-05-22 02:08:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:16,516 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-05-22 02:08:16,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-05-22 02:08:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:16,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:16,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:16,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-22 02:08:16,735 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-05-22 02:08:16,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:16,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134316140] [2021-05-22 02:08:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:16,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134316140] [2021-05-22 02:08:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134316140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203278085] [2021-05-22 02:08:16,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203278085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:16,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:16,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:16,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83125318] [2021-05-22 02:08:16,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:16,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:16,912 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:17,209 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-05-22 02:08:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:08:17,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:17,213 INFO L225 Difference]: With dead ends: 2425 [2021-05-22 02:08:17,213 INFO L226 Difference]: Without dead ends: 2400 [2021-05-22 02:08:17,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:08:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-05-22 02:08:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-05-22 02:08:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-05-22 02:08:17,246 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-05-22 02:08:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:17,246 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-05-22 02:08:17,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-05-22 02:08:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:17,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:17,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:17,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:17,466 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-05-22 02:08:17,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:17,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125619449] [2021-05-22 02:08:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:17,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125619449] [2021-05-22 02:08:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125619449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493527591] [2021-05-22 02:08:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:17,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493527591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:17,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:17,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988259896] [2021-05-22 02:08:17,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:17,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:17,698 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:18,002 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-05-22 02:08:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:08:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:18,006 INFO L225 Difference]: With dead ends: 2917 [2021-05-22 02:08:18,006 INFO L226 Difference]: Without dead ends: 2917 [2021-05-22 02:08:18,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:08:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-05-22 02:08:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-05-22 02:08:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-05-22 02:08:18,038 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-05-22 02:08:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:18,038 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-05-22 02:08:18,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-05-22 02:08:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:18,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:18,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:18,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-22 02:08:18,249 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-05-22 02:08:18,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:18,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297387906] [2021-05-22 02:08:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:18,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297387906] [2021-05-22 02:08:18,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297387906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22062264] [2021-05-22 02:08:18,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:18,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:08:18,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:18,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22062264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:18,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:18,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:18,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510169676] [2021-05-22 02:08:18,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:18,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:18,443 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:18,882 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-05-22 02:08:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:08:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:18,887 INFO L225 Difference]: With dead ends: 3352 [2021-05-22 02:08:18,887 INFO L226 Difference]: Without dead ends: 3352 [2021-05-22 02:08:18,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:08:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-05-22 02:08:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-05-22 02:08:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-05-22 02:08:18,921 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-05-22 02:08:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:18,921 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-05-22 02:08:18,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-05-22 02:08:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:18,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:18,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:19,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:19,141 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-05-22 02:08:19,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:19,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433304518] [2021-05-22 02:08:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:19,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:19,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433304518] [2021-05-22 02:08:19,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433304518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:19,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611563811] [2021-05-22 02:08:19,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611563811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:19,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:19,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:19,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431728358] [2021-05-22 02:08:19,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:19,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:19,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:19,343 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:19,531 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-05-22 02:08:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:08:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:19,534 INFO L225 Difference]: With dead ends: 2314 [2021-05-22 02:08:19,534 INFO L226 Difference]: Without dead ends: 2310 [2021-05-22 02:08:19,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:08:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-22 02:08:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-05-22 02:08:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-05-22 02:08:19,562 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-05-22 02:08:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:19,562 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-05-22 02:08:19,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-05-22 02:08:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:19,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:19,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:19,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-22 02:08:19,781 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-05-22 02:08:19,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:19,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182602497] [2021-05-22 02:08:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:19,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182602497] [2021-05-22 02:08:19,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182602497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779575212] [2021-05-22 02:08:19,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:19,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:08:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:19,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779575212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:19,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:19,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:19,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581718636] [2021-05-22 02:08:19,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:19,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:19,938 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:20,189 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-05-22 02:08:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:08:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:20,193 INFO L225 Difference]: With dead ends: 2505 [2021-05-22 02:08:20,193 INFO L226 Difference]: Without dead ends: 2501 [2021-05-22 02:08:20,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:08:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-05-22 02:08:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-05-22 02:08:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-05-22 02:08:20,224 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-05-22 02:08:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:20,224 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-05-22 02:08:20,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-05-22 02:08:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:20,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:20,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:20,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-22 02:08:20,433 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-05-22 02:08:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:20,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546326695] [2021-05-22 02:08:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:20,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:20,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546326695] [2021-05-22 02:08:20,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546326695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:20,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332226412] [2021-05-22 02:08:20,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:20,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:20,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332226412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:20,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:20,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:20,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271925977] [2021-05-22 02:08:20,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:20,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:20,650 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:20,899 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-05-22 02:08:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:08:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:20,903 INFO L225 Difference]: With dead ends: 2440 [2021-05-22 02:08:20,903 INFO L226 Difference]: Without dead ends: 2433 [2021-05-22 02:08:20,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:08:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-05-22 02:08:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-05-22 02:08:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-05-22 02:08:20,933 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-05-22 02:08:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:20,933 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-05-22 02:08:20,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-05-22 02:08:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:20,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:20,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:21,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-22 02:08:21,145 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-05-22 02:08:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:21,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188063143] [2021-05-22 02:08:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:21,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:21,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188063143] [2021-05-22 02:08:21,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188063143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:21,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248712858] [2021-05-22 02:08:21,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:21,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:08:21,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:21,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248712858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:21,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991057764] [2021-05-22 02:08:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:21,341 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:21,535 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-05-22 02:08:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:08:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:21,539 INFO L225 Difference]: With dead ends: 2267 [2021-05-22 02:08:21,539 INFO L226 Difference]: Without dead ends: 2263 [2021-05-22 02:08:21,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:08:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-05-22 02:08:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-05-22 02:08:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-05-22 02:08:21,564 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-05-22 02:08:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:21,565 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-05-22 02:08:21,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-05-22 02:08:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:21,568 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:21,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-22 02:08:21,783 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-05-22 02:08:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693593840] [2021-05-22 02:08:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:21,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:21,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693593840] [2021-05-22 02:08:21,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693593840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:21,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104572924] [2021-05-22 02:08:21,855 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:21,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:08:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104572924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:22,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:22,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:08:22,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73246480] [2021-05-22 02:08:22,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:08:22,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:08:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:08:22,017 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:22,239 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-05-22 02:08:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:08:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:22,244 INFO L225 Difference]: With dead ends: 3127 [2021-05-22 02:08:22,244 INFO L226 Difference]: Without dead ends: 3117 [2021-05-22 02:08:22,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:08:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-05-22 02:08:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-05-22 02:08:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-05-22 02:08:22,278 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-05-22 02:08:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:22,278 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-05-22 02:08:22,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-05-22 02:08:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:22,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:22,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:22,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:22,489 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-05-22 02:08:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:22,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426091352] [2021-05-22 02:08:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:22,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:22,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426091352] [2021-05-22 02:08:22,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426091352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:22,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326309375] [2021-05-22 02:08:22,533 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:22,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:08:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:22,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326309375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:22,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:22,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818504561] [2021-05-22 02:08:22,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:22,663 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:23,001 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-05-22 02:08:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:08:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:23,006 INFO L225 Difference]: With dead ends: 2611 [2021-05-22 02:08:23,006 INFO L226 Difference]: Without dead ends: 2586 [2021-05-22 02:08:23,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:08:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-05-22 02:08:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-05-22 02:08:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-05-22 02:08:23,066 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-05-22 02:08:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:23,066 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-05-22 02:08:23,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-05-22 02:08:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:23,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:23,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:23,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-22 02:08:23,275 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-05-22 02:08:23,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:23,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538703772] [2021-05-22 02:08:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:23,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538703772] [2021-05-22 02:08:23,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538703772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:23,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662958848] [2021-05-22 02:08:23,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662958848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:23,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:23,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:23,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914242574] [2021-05-22 02:08:23,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:23,485 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:23,841 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-05-22 02:08:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:08:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:23,845 INFO L225 Difference]: With dead ends: 2721 [2021-05-22 02:08:23,846 INFO L226 Difference]: Without dead ends: 2696 [2021-05-22 02:08:23,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:08:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-22 02:08:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-05-22 02:08:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-05-22 02:08:23,883 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-05-22 02:08:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:23,883 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-05-22 02:08:23,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-05-22 02:08:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:23,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:23,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:24,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-22 02:08:24,107 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-05-22 02:08:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:24,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664455565] [2021-05-22 02:08:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:24,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664455565] [2021-05-22 02:08:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664455565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57416060] [2021-05-22 02:08:24,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57416060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:24,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:24,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051805310] [2021-05-22 02:08:24,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:24,264 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:24,834 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-05-22 02:08:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:08:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:24,840 INFO L225 Difference]: With dead ends: 3206 [2021-05-22 02:08:24,840 INFO L226 Difference]: Without dead ends: 3185 [2021-05-22 02:08:24,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:08:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-05-22 02:08:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-05-22 02:08:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-05-22 02:08:24,877 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-05-22 02:08:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:24,877 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-05-22 02:08:24,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-05-22 02:08:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:24,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:24,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:25,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:25,090 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-05-22 02:08:25,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:25,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540974761] [2021-05-22 02:08:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:25,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540974761] [2021-05-22 02:08:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540974761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892542353] [2021-05-22 02:08:25,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:25,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:08:25,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:25,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892542353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:25,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:25,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:25,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606794904] [2021-05-22 02:08:25,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:25,256 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:26,059 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-05-22 02:08:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:08:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:26,070 INFO L225 Difference]: With dead ends: 3541 [2021-05-22 02:08:26,070 INFO L226 Difference]: Without dead ends: 3541 [2021-05-22 02:08:26,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:08:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-05-22 02:08:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-05-22 02:08:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-05-22 02:08:26,105 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-05-22 02:08:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:26,106 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-05-22 02:08:26,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-05-22 02:08:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:26,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:26,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:26,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-22 02:08:26,324 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-05-22 02:08:26,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:26,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650735622] [2021-05-22 02:08:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:26,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:26,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650735622] [2021-05-22 02:08:26,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650735622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739845613] [2021-05-22 02:08:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:26,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:26,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:26,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739845613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:26,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:26,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:26,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272347368] [2021-05-22 02:08:26,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:26,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:26,508 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:27,115 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-05-22 02:08:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:08:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:27,122 INFO L225 Difference]: With dead ends: 3908 [2021-05-22 02:08:27,122 INFO L226 Difference]: Without dead ends: 3900 [2021-05-22 02:08:27,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:08:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-05-22 02:08:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-05-22 02:08:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-05-22 02:08:27,160 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-05-22 02:08:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:27,160 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-05-22 02:08:27,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-05-22 02:08:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:27,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:27,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:27,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:27,377 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-05-22 02:08:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:27,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437598043] [2021-05-22 02:08:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:27,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437598043] [2021-05-22 02:08:27,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437598043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481797490] [2021-05-22 02:08:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:27,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:27,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:27,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481797490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:27,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:27,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:27,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078153137] [2021-05-22 02:08:27,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:27,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:27,533 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:28,115 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-05-22 02:08:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:08:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:28,122 INFO L225 Difference]: With dead ends: 4086 [2021-05-22 02:08:28,122 INFO L226 Difference]: Without dead ends: 4086 [2021-05-22 02:08:28,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:08:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-05-22 02:08:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-05-22 02:08:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-05-22 02:08:28,160 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-05-22 02:08:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:28,160 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-05-22 02:08:28,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-05-22 02:08:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:28,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:28,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:28,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-22 02:08:28,379 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:28,379 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-05-22 02:08:28,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:28,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174945635] [2021-05-22 02:08:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:28,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174945635] [2021-05-22 02:08:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174945635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159817525] [2021-05-22 02:08:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:28,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:08:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:28,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159817525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:28,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:28,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:28,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215923527] [2021-05-22 02:08:28,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:28,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:28,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:28,553 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:28,941 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-05-22 02:08:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:08:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:28,946 INFO L225 Difference]: With dead ends: 3342 [2021-05-22 02:08:28,946 INFO L226 Difference]: Without dead ends: 3334 [2021-05-22 02:08:28,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:08:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-05-22 02:08:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-05-22 02:08:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-05-22 02:08:28,996 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-05-22 02:08:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:28,997 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-05-22 02:08:28,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-05-22 02:08:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:29,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:29,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:29,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:29,215 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:29,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-05-22 02:08:29,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:29,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008263310] [2021-05-22 02:08:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:29,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008263310] [2021-05-22 02:08:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008263310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078493888] [2021-05-22 02:08:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:29,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:29,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:29,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078493888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:29,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:29,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:08:29,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356686327] [2021-05-22 02:08:29,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:08:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:08:29,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:08:29,347 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:29,673 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-05-22 02:08:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:08:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:29,679 INFO L225 Difference]: With dead ends: 3190 [2021-05-22 02:08:29,679 INFO L226 Difference]: Without dead ends: 3178 [2021-05-22 02:08:29,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:08:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-05-22 02:08:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-05-22 02:08:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-05-22 02:08:29,718 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-05-22 02:08:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:29,718 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-05-22 02:08:29,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-05-22 02:08:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:29,721 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:29,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:29,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-22 02:08:29,921 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-05-22 02:08:29,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:29,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382489180] [2021-05-22 02:08:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:29,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:29,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382489180] [2021-05-22 02:08:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382489180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:29,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626298438] [2021-05-22 02:08:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:30,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:08:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:30,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626298438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:30,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:30,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:08:30,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499227459] [2021-05-22 02:08:30,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:08:30,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:08:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:08:30,096 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:30,621 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-05-22 02:08:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:08:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:30,628 INFO L225 Difference]: With dead ends: 3630 [2021-05-22 02:08:30,628 INFO L226 Difference]: Without dead ends: 3630 [2021-05-22 02:08:30,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:08:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-05-22 02:08:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-05-22 02:08:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-05-22 02:08:30,665 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-05-22 02:08:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:30,665 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-05-22 02:08:30,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-05-22 02:08:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:08:30,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:30,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:30,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-22 02:08:30,884 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-05-22 02:08:30,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:30,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064621424] [2021-05-22 02:08:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:30,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064621424] [2021-05-22 02:08:30,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064621424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485523687] [2021-05-22 02:08:30,921 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:30,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:08:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:08:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:31,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485523687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:31,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:31,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-22 02:08:31,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350524435] [2021-05-22 02:08:31,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:08:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:08:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:08:31,017 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:31,518 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-05-22 02:08:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:08:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:08:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:31,523 INFO L225 Difference]: With dead ends: 3456 [2021-05-22 02:08:31,523 INFO L226 Difference]: Without dead ends: 3446 [2021-05-22 02:08:31,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:08:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-05-22 02:08:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-05-22 02:08:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-05-22 02:08:31,557 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-05-22 02:08:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:31,557 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-05-22 02:08:31,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-05-22 02:08:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:08:31,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:31,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:31,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-22 02:08:31,776 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-05-22 02:08:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:31,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503727323] [2021-05-22 02:08:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:31,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:31,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503727323] [2021-05-22 02:08:31,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503727323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:31,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213054353] [2021-05-22 02:08:31,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:31,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:31,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:08:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213054353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:32,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:32,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-22 02:08:32,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664065608] [2021-05-22 02:08:32,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:08:32,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:08:32,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:08:32,054 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:32,201 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-05-22 02:08:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:08:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:08:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:32,206 INFO L225 Difference]: With dead ends: 3313 [2021-05-22 02:08:32,206 INFO L226 Difference]: Without dead ends: 3283 [2021-05-22 02:08:32,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-05-22 02:08:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-05-22 02:08:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-05-22 02:08:32,247 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-05-22 02:08:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:32,248 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-05-22 02:08:32,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-05-22 02:08:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:08:32,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:32,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:32,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-22 02:08:32,457 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-05-22 02:08:32,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:32,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833885771] [2021-05-22 02:08:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:08:32,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833885771] [2021-05-22 02:08:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833885771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996256339] [2021-05-22 02:08:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:08:32,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:32,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:08:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996256339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:32,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:32,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623311230] [2021-05-22 02:08:32,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:32,677 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:32,854 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-05-22 02:08:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:08:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:08:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:32,861 INFO L225 Difference]: With dead ends: 3950 [2021-05-22 02:08:32,861 INFO L226 Difference]: Without dead ends: 3891 [2021-05-22 02:08:32,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:08:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-05-22 02:08:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-05-22 02:08:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-05-22 02:08:32,916 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-05-22 02:08:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-05-22 02:08:32,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-05-22 02:08:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:08:32,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:32,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:33,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-22 02:08:33,133 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-05-22 02:08:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258535334] [2021-05-22 02:08:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:33,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:33,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258535334] [2021-05-22 02:08:33,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258535334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:33,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988716] [2021-05-22 02:08:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:08:33,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:33,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:33,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:33,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:33,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353850952] [2021-05-22 02:08:33,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:33,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:33,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:33,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:33,335 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:33,480 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-05-22 02:08:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:08:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:08:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:33,488 INFO L225 Difference]: With dead ends: 3639 [2021-05-22 02:08:33,488 INFO L226 Difference]: Without dead ends: 3609 [2021-05-22 02:08:33,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:08:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-05-22 02:08:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-05-22 02:08:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-05-22 02:08:33,544 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-05-22 02:08:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:33,544 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-05-22 02:08:33,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-05-22 02:08:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:08:33,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:33,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:33,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-22 02:08:33,765 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-05-22 02:08:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:33,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939049751] [2021-05-22 02:08:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:33,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:33,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939049751] [2021-05-22 02:08:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939049751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:33,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280128547] [2021-05-22 02:08:33,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:33,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:08:33,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280128547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-22 02:08:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397486158] [2021-05-22 02:08:33,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:33,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:33,968 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:34,171 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-05-22 02:08:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:08:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:08:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:34,177 INFO L225 Difference]: With dead ends: 3651 [2021-05-22 02:08:34,178 INFO L226 Difference]: Without dead ends: 3621 [2021-05-22 02:08:34,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:08:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-05-22 02:08:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-05-22 02:08:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-05-22 02:08:34,262 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-05-22 02:08:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:34,264 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-05-22 02:08:34,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-05-22 02:08:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:34,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:34,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:34,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:34,485 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-05-22 02:08:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:34,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11970275] [2021-05-22 02:08:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:34,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:34,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11970275] [2021-05-22 02:08:34,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11970275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:34,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953486916] [2021-05-22 02:08:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:34,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:34,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953486916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:34,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:34,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:08:34,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103267308] [2021-05-22 02:08:34,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:08:34,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:34,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:08:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:08:34,770 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:35,187 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-05-22 02:08:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:08:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:35,196 INFO L225 Difference]: With dead ends: 5445 [2021-05-22 02:08:35,196 INFO L226 Difference]: Without dead ends: 5445 [2021-05-22 02:08:35,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:08:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-05-22 02:08:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-05-22 02:08:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-05-22 02:08:35,262 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-05-22 02:08:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:35,262 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-05-22 02:08:35,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-05-22 02:08:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:35,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:35,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:35,469 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-05-22 02:08:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783056294] [2021-05-22 02:08:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:35,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783056294] [2021-05-22 02:08:35,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783056294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390557307] [2021-05-22 02:08:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:35,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:08:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:08:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390557307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:35,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:35,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:08:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770442881] [2021-05-22 02:08:35,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:08:35,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:08:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:08:35,775 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:36,202 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-05-22 02:08:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:08:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:36,212 INFO L225 Difference]: With dead ends: 5828 [2021-05-22 02:08:36,212 INFO L226 Difference]: Without dead ends: 5828 [2021-05-22 02:08:36,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:08:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-05-22 02:08:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-05-22 02:08:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-05-22 02:08:36,285 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-05-22 02:08:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:36,285 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-05-22 02:08:36,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-05-22 02:08:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:36,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:36,291 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:36,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:36,507 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:36,507 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-05-22 02:08:36,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:36,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240765128] [2021-05-22 02:08:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:36,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240765128] [2021-05-22 02:08:36,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240765128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:36,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204289305] [2021-05-22 02:08:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:36,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:08:36,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:36,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204289305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:36,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:36,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:36,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447395738] [2021-05-22 02:08:36,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:36,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:36,729 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:37,292 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-05-22 02:08:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:08:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:37,301 INFO L225 Difference]: With dead ends: 5115 [2021-05-22 02:08:37,301 INFO L226 Difference]: Without dead ends: 5076 [2021-05-22 02:08:37,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:08:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-05-22 02:08:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-05-22 02:08:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-05-22 02:08:37,372 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-05-22 02:08:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:37,372 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-05-22 02:08:37,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-05-22 02:08:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:37,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:37,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:37,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:37,594 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-05-22 02:08:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:37,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782278726] [2021-05-22 02:08:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:37,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782278726] [2021-05-22 02:08:37,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782278726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157277812] [2021-05-22 02:08:37,647 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:37,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:08:37,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:37,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157277812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:37,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:37,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:37,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261908755] [2021-05-22 02:08:37,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:37,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:37,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:37,796 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:39,819 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-05-22 02:08:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-22 02:08:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:39,835 INFO L225 Difference]: With dead ends: 9010 [2021-05-22 02:08:39,835 INFO L226 Difference]: Without dead ends: 9010 [2021-05-22 02:08:39,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1647.8ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-05-22 02:08:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-05-22 02:08:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-05-22 02:08:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-05-22 02:08:39,942 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-05-22 02:08:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:39,942 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-05-22 02:08:39,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-05-22 02:08:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:39,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:39,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:40,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-22 02:08:40,164 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-05-22 02:08:40,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:40,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141217588] [2021-05-22 02:08:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:40,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141217588] [2021-05-22 02:08:40,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141217588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469458273] [2021-05-22 02:08:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:40,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:08:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:40,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469458273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:40,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:40,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:08:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086110455] [2021-05-22 02:08:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:08:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:08:40,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:08:40,318 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:41,627 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-05-22 02:08:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 02:08:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:41,653 INFO L225 Difference]: With dead ends: 13558 [2021-05-22 02:08:41,653 INFO L226 Difference]: Without dead ends: 13548 [2021-05-22 02:08:41,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:08:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-05-22 02:08:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-05-22 02:08:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-05-22 02:08:41,849 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-05-22 02:08:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:41,849 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-05-22 02:08:41,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-05-22 02:08:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:41,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:41,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:42,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:42,102 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:42,102 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-05-22 02:08:42,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:42,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610423611] [2021-05-22 02:08:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:42,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610423611] [2021-05-22 02:08:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610423611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055222100] [2021-05-22 02:08:42,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:08:42,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:08:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:08:42,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:42,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055222100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:42,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:42,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:08:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014868021] [2021-05-22 02:08:42,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:08:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:08:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:08:42,371 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:43,549 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-05-22 02:08:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:08:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:43,583 INFO L225 Difference]: With dead ends: 16076 [2021-05-22 02:08:43,583 INFO L226 Difference]: Without dead ends: 16076 [2021-05-22 02:08:43,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:08:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-05-22 02:08:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-05-22 02:08:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-05-22 02:08:43,761 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-05-22 02:08:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:43,761 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-05-22 02:08:43,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-05-22 02:08:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:43,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:43,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:43,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-22 02:08:43,972 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-05-22 02:08:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:43,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570263197] [2021-05-22 02:08:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:44,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:44,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570263197] [2021-05-22 02:08:44,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570263197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:44,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015479866] [2021-05-22 02:08:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:44,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015479866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:44,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:44,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:44,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607207526] [2021-05-22 02:08:44,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:44,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:44,215 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:45,577 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-05-22 02:08:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 02:08:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:45,594 INFO L225 Difference]: With dead ends: 8927 [2021-05-22 02:08:45,594 INFO L226 Difference]: Without dead ends: 8899 [2021-05-22 02:08:45,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:08:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-05-22 02:08:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-05-22 02:08:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-05-22 02:08:45,730 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-05-22 02:08:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:45,730 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-05-22 02:08:45,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-05-22 02:08:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:45,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:45,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:45,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:45,954 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-05-22 02:08:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:45,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531137363] [2021-05-22 02:08:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:46,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:46,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531137363] [2021-05-22 02:08:46,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531137363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:46,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764285148] [2021-05-22 02:08:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:46,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:46,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764285148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:46,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:46,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748636296] [2021-05-22 02:08:46,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:46,202 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:47,353 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-05-22 02:08:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:08:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:47,370 INFO L225 Difference]: With dead ends: 8770 [2021-05-22 02:08:47,370 INFO L226 Difference]: Without dead ends: 8707 [2021-05-22 02:08:47,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 841.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:08:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-05-22 02:08:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-05-22 02:08:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-05-22 02:08:47,547 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-05-22 02:08:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:47,547 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-05-22 02:08:47,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-05-22 02:08:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:47,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:47,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:47,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-22 02:08:47,765 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-05-22 02:08:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714065845] [2021-05-22 02:08:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:47,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714065845] [2021-05-22 02:08:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714065845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:47,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824304569] [2021-05-22 02:08:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:47,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:08:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:48,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824304569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:48,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:48,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413826491] [2021-05-22 02:08:48,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:48,015 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:48,655 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-05-22 02:08:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:08:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:48,667 INFO L225 Difference]: With dead ends: 6773 [2021-05-22 02:08:48,667 INFO L226 Difference]: Without dead ends: 6734 [2021-05-22 02:08:48,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:08:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-05-22 02:08:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-05-22 02:08:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-05-22 02:08:48,757 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-05-22 02:08:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:48,758 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-05-22 02:08:48,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-05-22 02:08:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:48,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:48,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:48,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:48,981 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-05-22 02:08:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:48,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916025597] [2021-05-22 02:08:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:49,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:49,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916025597] [2021-05-22 02:08:49,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916025597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:49,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983566601] [2021-05-22 02:08:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:49,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:08:49,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:49,344 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-22 02:08:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:49,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983566601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:49,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:49,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289894496] [2021-05-22 02:08:49,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:49,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:49,605 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:50,555 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-05-22 02:08:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:08:50,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:50,569 INFO L225 Difference]: With dead ends: 7641 [2021-05-22 02:08:50,569 INFO L226 Difference]: Without dead ends: 7578 [2021-05-22 02:08:50,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:08:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-05-22 02:08:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-05-22 02:08:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-05-22 02:08:50,689 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-05-22 02:08:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:50,689 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-05-22 02:08:50,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-05-22 02:08:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:50,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:50,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:50,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:50,914 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-05-22 02:08:50,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:50,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060802718] [2021-05-22 02:08:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:50,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060802718] [2021-05-22 02:08:50,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060802718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562894971] [2021-05-22 02:08:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:51,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:08:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562894971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:51,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:51,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:51,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031798469] [2021-05-22 02:08:51,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:51,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:51,188 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:52,383 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-05-22 02:08:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:08:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:52,398 INFO L225 Difference]: With dead ends: 8374 [2021-05-22 02:08:52,398 INFO L226 Difference]: Without dead ends: 8346 [2021-05-22 02:08:52,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 956.3ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:08:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-05-22 02:08:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-05-22 02:08:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-05-22 02:08:52,518 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-05-22 02:08:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:52,518 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-05-22 02:08:52,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-05-22 02:08:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:52,528 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:52,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:52,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-22 02:08:52,745 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-05-22 02:08:52,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:52,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778992695] [2021-05-22 02:08:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:52,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:52,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778992695] [2021-05-22 02:08:52,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778992695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:52,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016579382] [2021-05-22 02:08:52,851 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:52,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:08:52,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016579382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:53,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:53,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:08:53,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405905534] [2021-05-22 02:08:53,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:08:53,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:53,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:08:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:08:53,060 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:54,733 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-05-22 02:08:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:08:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:54,748 INFO L225 Difference]: With dead ends: 8593 [2021-05-22 02:08:54,748 INFO L226 Difference]: Without dead ends: 8581 [2021-05-22 02:08:54,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1363.6ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:08:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-05-22 02:08:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-05-22 02:08:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-05-22 02:08:54,870 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-05-22 02:08:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:54,870 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-05-22 02:08:54,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-05-22 02:08:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:54,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:54,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:55,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:55,096 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-05-22 02:08:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:55,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357446590] [2021-05-22 02:08:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357446590] [2021-05-22 02:08:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357446590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717769517] [2021-05-22 02:08:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:08:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:55,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717769517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:55,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:55,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-05-22 02:08:55,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499391837] [2021-05-22 02:08:55,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:08:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:08:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:08:55,239 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:55,581 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-05-22 02:08:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:08:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:55,598 INFO L225 Difference]: With dead ends: 8392 [2021-05-22 02:08:55,598 INFO L226 Difference]: Without dead ends: 8384 [2021-05-22 02:08:55,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:08:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-05-22 02:08:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-05-22 02:08:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-05-22 02:08:55,742 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-05-22 02:08:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:55,742 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-05-22 02:08:55,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-05-22 02:08:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:55,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:55,752 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:55,968 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-05-22 02:08:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:55,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539003754] [2021-05-22 02:08:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:56,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:56,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539003754] [2021-05-22 02:08:56,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539003754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:56,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151994828] [2021-05-22 02:08:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:08:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:56,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151994828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:56,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:56,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:08:56,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18607008] [2021-05-22 02:08:56,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:08:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:08:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:08:56,168 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:08:58,125 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-05-22 02:08:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:08:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:08:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:08:58,143 INFO L225 Difference]: With dead ends: 10663 [2021-05-22 02:08:58,144 INFO L226 Difference]: Without dead ends: 10663 [2021-05-22 02:08:58,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1441.4ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:08:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-05-22 02:08:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-05-22 02:08:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-05-22 02:08:58,357 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-05-22 02:08:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:08:58,357 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-05-22 02:08:58,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:08:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-05-22 02:08:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:08:58,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:08:58,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:08:58,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-22 02:08:58,583 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:08:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:08:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-05-22 02:08:58,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:08:58,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642308347] [2021-05-22 02:08:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:08:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:08:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:58,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:08:58,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642308347] [2021-05-22 02:08:58,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642308347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:58,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269891845] [2021-05-22 02:08:58,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:08:58,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:08:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:08:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:08:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:08:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:08:58,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269891845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:08:58,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:08:58,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:08:58,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733441347] [2021-05-22 02:08:58,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:08:58,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:08:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:08:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:08:58,774 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:00,297 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-05-22 02:09:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:09:00,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:00,315 INFO L225 Difference]: With dead ends: 9445 [2021-05-22 02:09:00,315 INFO L226 Difference]: Without dead ends: 9417 [2021-05-22 02:09:00,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:09:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-05-22 02:09:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-05-22 02:09:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-05-22 02:09:00,447 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-05-22 02:09:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:00,447 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-05-22 02:09:00,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-05-22 02:09:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:00,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:00,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:00,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:00,672 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-05-22 02:09:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:00,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194468662] [2021-05-22 02:09:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:00,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:00,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194468662] [2021-05-22 02:09:00,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194468662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:00,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285158505] [2021-05-22 02:09:00,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:00,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:00,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:00,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285158505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:00,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:00,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:00,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581132409] [2021-05-22 02:09:00,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:00,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:00,907 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:02,927 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-05-22 02:09:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:09:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:02,949 INFO L225 Difference]: With dead ends: 11207 [2021-05-22 02:09:02,949 INFO L226 Difference]: Without dead ends: 11207 [2021-05-22 02:09:02,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1451.6ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:09:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-05-22 02:09:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-05-22 02:09:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-05-22 02:09:03,119 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-05-22 02:09:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:03,119 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-05-22 02:09:03,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-05-22 02:09:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:03,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:03,130 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:03,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-22 02:09:03,330 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-05-22 02:09:03,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:03,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023997879] [2021-05-22 02:09:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:03,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:03,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023997879] [2021-05-22 02:09:03,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023997879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:03,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547990350] [2021-05-22 02:09:03,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:03,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:09:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:03,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547990350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:03,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:03,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:03,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752408323] [2021-05-22 02:09:03,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:03,550 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:05,038 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-05-22 02:09:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:09:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:05,056 INFO L225 Difference]: With dead ends: 10680 [2021-05-22 02:09:05,056 INFO L226 Difference]: Without dead ends: 10668 [2021-05-22 02:09:05,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1077.4ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:09:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-05-22 02:09:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-05-22 02:09:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-05-22 02:09:05,215 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-05-22 02:09:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:05,215 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-05-22 02:09:05,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-05-22 02:09:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:05,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:05,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:05,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-22 02:09:05,443 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-05-22 02:09:05,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:05,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611891115] [2021-05-22 02:09:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:05,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611891115] [2021-05-22 02:09:05,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611891115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616975018] [2021-05-22 02:09:05,500 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:05,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:09:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616975018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:05,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:05,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:05,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069097770] [2021-05-22 02:09:05,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:05,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:05,680 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:06,791 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-05-22 02:09:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:09:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:06,808 INFO L225 Difference]: With dead ends: 9675 [2021-05-22 02:09:06,808 INFO L226 Difference]: Without dead ends: 9654 [2021-05-22 02:09:06,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:09:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-05-22 02:09:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-05-22 02:09:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-05-22 02:09:06,949 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-05-22 02:09:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:06,949 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-05-22 02:09:06,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-05-22 02:09:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:06,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:06,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:07,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-22 02:09:07,173 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-05-22 02:09:07,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:07,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722868114] [2021-05-22 02:09:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:07,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:07,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722868114] [2021-05-22 02:09:07,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722868114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:07,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769655483] [2021-05-22 02:09:07,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:09:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:07,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769655483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:07,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:07,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:07,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54204564] [2021-05-22 02:09:07,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:07,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:07,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:07,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:07,450 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:08,847 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-05-22 02:09:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:09:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:08,865 INFO L225 Difference]: With dead ends: 10253 [2021-05-22 02:09:08,865 INFO L226 Difference]: Without dead ends: 10241 [2021-05-22 02:09:08,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1091.2ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:09:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-05-22 02:09:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-05-22 02:09:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-05-22 02:09:08,996 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-05-22 02:09:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:08,996 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-05-22 02:09:08,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-05-22 02:09:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:09,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:09,006 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:09,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:09,221 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-05-22 02:09:09,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:09,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400044012] [2021-05-22 02:09:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:09,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400044012] [2021-05-22 02:09:09,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400044012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208014160] [2021-05-22 02:09:09,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:09,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:09,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208014160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:09,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:09,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486163369] [2021-05-22 02:09:09,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:09,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:09,483 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:10,395 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-05-22 02:09:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:09:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:10,412 INFO L225 Difference]: With dead ends: 10693 [2021-05-22 02:09:10,412 INFO L226 Difference]: Without dead ends: 10630 [2021-05-22 02:09:10,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:09:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-05-22 02:09:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-05-22 02:09:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-05-22 02:09:10,619 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-05-22 02:09:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:10,619 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-05-22 02:09:10,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-05-22 02:09:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:10,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:10,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:10,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:10,847 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-05-22 02:09:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:10,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761069059] [2021-05-22 02:09:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:10,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761069059] [2021-05-22 02:09:10,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761069059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837956726] [2021-05-22 02:09:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:10,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:10,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:10,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837956726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:11,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:11,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759762401] [2021-05-22 02:09:11,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:11,025 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:12,210 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-05-22 02:09:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:09:12,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:12,230 INFO L225 Difference]: With dead ends: 11280 [2021-05-22 02:09:12,230 INFO L226 Difference]: Without dead ends: 11245 [2021-05-22 02:09:12,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 866.5ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:09:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-05-22 02:09:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-05-22 02:09:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-05-22 02:09:12,381 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-05-22 02:09:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:12,382 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-05-22 02:09:12,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-05-22 02:09:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:12,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:12,393 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:12,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:12,594 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-05-22 02:09:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:12,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870512039] [2021-05-22 02:09:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:12,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:12,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870512039] [2021-05-22 02:09:12,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870512039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:12,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710518729] [2021-05-22 02:09:12,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:12,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710518729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:12,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:12,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:12,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600206443] [2021-05-22 02:09:12,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:12,942 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:14,466 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-05-22 02:09:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:09:14,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:14,488 INFO L225 Difference]: With dead ends: 11657 [2021-05-22 02:09:14,488 INFO L226 Difference]: Without dead ends: 11645 [2021-05-22 02:09:14,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1246.9ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:09:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-05-22 02:09:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-05-22 02:09:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-05-22 02:09:14,658 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-05-22 02:09:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:14,658 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-05-22 02:09:14,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-05-22 02:09:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:14,669 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:14,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:14,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:14,886 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-05-22 02:09:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:14,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032555072] [2021-05-22 02:09:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:14,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:14,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032555072] [2021-05-22 02:09:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032555072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466624174] [2021-05-22 02:09:14,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:14,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:09:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:09:14,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:15,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466624174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:15,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:15,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-22 02:09:15,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769280912] [2021-05-22 02:09:15,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:09:15,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:09:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:09:15,009 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:15,359 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-05-22 02:09:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:09:15,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:15,396 INFO L225 Difference]: With dead ends: 17556 [2021-05-22 02:09:15,396 INFO L226 Difference]: Without dead ends: 17556 [2021-05-22 02:09:15,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:09:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-05-22 02:09:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-05-22 02:09:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-05-22 02:09:15,679 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-05-22 02:09:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:15,679 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-05-22 02:09:15,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-05-22 02:09:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:15,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:15,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:15,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-22 02:09:15,913 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-05-22 02:09:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:15,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958768363] [2021-05-22 02:09:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:15,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958768363] [2021-05-22 02:09:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958768363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857647815] [2021-05-22 02:09:15,972 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:16,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:09:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:09:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857647815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-22 02:09:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5517014] [2021-05-22 02:09:16,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:09:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:09:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:09:16,063 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:16,341 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-05-22 02:09:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:09:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:16,374 INFO L225 Difference]: With dead ends: 14487 [2021-05-22 02:09:16,374 INFO L226 Difference]: Without dead ends: 14473 [2021-05-22 02:09:16,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:09:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-05-22 02:09:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-05-22 02:09:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-05-22 02:09:16,684 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-05-22 02:09:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:16,685 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-05-22 02:09:16,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-05-22 02:09:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:16,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:16,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:16,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:16,912 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-05-22 02:09:16,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:16,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987303559] [2021-05-22 02:09:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:16,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987303559] [2021-05-22 02:09:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987303559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649722815] [2021-05-22 02:09:16,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:09:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:17,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:09:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649722815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:17,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:17,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-05-22 02:09:17,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200115632] [2021-05-22 02:09:17,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:09:17,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:17,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:09:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:09:17,065 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:17,354 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-05-22 02:09:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:09:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:17,383 INFO L225 Difference]: With dead ends: 13632 [2021-05-22 02:09:17,383 INFO L226 Difference]: Without dead ends: 13610 [2021-05-22 02:09:17,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:09:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-05-22 02:09:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-05-22 02:09:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-05-22 02:09:17,569 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-05-22 02:09:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:17,569 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-05-22 02:09:17,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-05-22 02:09:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:17,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:17,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:17,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:17,782 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-05-22 02:09:17,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:17,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452030500] [2021-05-22 02:09:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:17,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452030500] [2021-05-22 02:09:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452030500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111058232] [2021-05-22 02:09:17,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:17,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111058232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:17,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:17,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708101396] [2021-05-22 02:09:17,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:17,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:17,974 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:19,335 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-22 02:09:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:20,077 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-05-22 02:09:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-22 02:09:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:20,100 INFO L225 Difference]: With dead ends: 12080 [2021-05-22 02:09:20,100 INFO L226 Difference]: Without dead ends: 12080 [2021-05-22 02:09:20,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1629.4ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:09:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-05-22 02:09:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-05-22 02:09:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-05-22 02:09:20,288 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-05-22 02:09:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:20,288 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-05-22 02:09:20,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-05-22 02:09:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:20,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:20,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-22 02:09:20,517 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-05-22 02:09:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500849734] [2021-05-22 02:09:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500849734] [2021-05-22 02:09:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500849734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856165222] [2021-05-22 02:09:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:20,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856165222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:20,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:20,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:20,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857646401] [2021-05-22 02:09:20,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:20,870 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:22,112 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-05-22 02:09:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:09:22,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:22,131 INFO L225 Difference]: With dead ends: 10961 [2021-05-22 02:09:22,131 INFO L226 Difference]: Without dead ends: 10947 [2021-05-22 02:09:22,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:09:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-05-22 02:09:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-05-22 02:09:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-05-22 02:09:22,312 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-05-22 02:09:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:22,313 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-05-22 02:09:22,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-05-22 02:09:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:22,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:22,327 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:22,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:22,541 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-05-22 02:09:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:22,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701889152] [2021-05-22 02:09:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:09:22,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:22,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701889152] [2021-05-22 02:09:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701889152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:22,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855570259] [2021-05-22 02:09:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:22,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:22,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:22,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:22,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855570259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:22,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:22,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:22,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11389799] [2021-05-22 02:09:22,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:22,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:22,697 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:23,669 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-05-22 02:09:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:09:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:23,693 INFO L225 Difference]: With dead ends: 10752 [2021-05-22 02:09:23,693 INFO L226 Difference]: Without dead ends: 10689 [2021-05-22 02:09:23,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:09:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-05-22 02:09:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-05-22 02:09:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-05-22 02:09:23,892 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-05-22 02:09:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:23,892 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-05-22 02:09:23,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-05-22 02:09:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:23,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:23,906 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:24,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-22 02:09:24,110 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:24,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-05-22 02:09:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:24,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004460062] [2021-05-22 02:09:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:24,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:24,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004460062] [2021-05-22 02:09:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004460062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:24,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668425394] [2021-05-22 02:09:24,150 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:24,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:09:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:24,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668425394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:24,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:24,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280721928] [2021-05-22 02:09:24,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:24,303 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:25,179 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-05-22 02:09:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:09:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:25,196 INFO L225 Difference]: With dead ends: 9191 [2021-05-22 02:09:25,196 INFO L226 Difference]: Without dead ends: 9187 [2021-05-22 02:09:25,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:09:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-05-22 02:09:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-05-22 02:09:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-05-22 02:09:25,330 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-05-22 02:09:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:25,330 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-05-22 02:09:25,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-05-22 02:09:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:25,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:25,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:25,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:25,543 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-05-22 02:09:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:25,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758607466] [2021-05-22 02:09:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:25,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758607466] [2021-05-22 02:09:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758607466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012563359] [2021-05-22 02:09:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:25,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012563359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:25,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:25,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:09:25,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823361159] [2021-05-22 02:09:25,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:25,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:25,698 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:26,310 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-05-22 02:09:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:09:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:26,349 INFO L225 Difference]: With dead ends: 19794 [2021-05-22 02:09:26,349 INFO L226 Difference]: Without dead ends: 19766 [2021-05-22 02:09:26,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:09:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-05-22 02:09:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-05-22 02:09:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-05-22 02:09:26,621 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-05-22 02:09:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:26,621 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-05-22 02:09:26,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-05-22 02:09:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:26,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:26,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:26,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-05-22 02:09:26,836 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:26,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-05-22 02:09:26,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:26,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641170150] [2021-05-22 02:09:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:26,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641170150] [2021-05-22 02:09:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641170150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286479516] [2021-05-22 02:09:26,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:26,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:27,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286479516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:27,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:27,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:09:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559055152] [2021-05-22 02:09:27,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:09:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:09:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:09:27,019 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:27,640 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-05-22 02:09:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:09:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:27,691 INFO L225 Difference]: With dead ends: 24314 [2021-05-22 02:09:27,691 INFO L226 Difference]: Without dead ends: 24300 [2021-05-22 02:09:27,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:09:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-05-22 02:09:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-05-22 02:09:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-05-22 02:09:28,010 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-05-22 02:09:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-05-22 02:09:28,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-05-22 02:09:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:28,027 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:28,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:28,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:28,241 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-05-22 02:09:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:28,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558636133] [2021-05-22 02:09:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:28,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558636133] [2021-05-22 02:09:28,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558636133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020563477] [2021-05-22 02:09:28,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:28,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:28,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:28,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:28,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:28,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020563477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:28,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:28,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:28,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60123613] [2021-05-22 02:09:28,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:28,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:28,416 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:29,178 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-05-22 02:09:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:09:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:29,201 INFO L225 Difference]: With dead ends: 12255 [2021-05-22 02:09:29,202 INFO L226 Difference]: Without dead ends: 12241 [2021-05-22 02:09:29,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:09:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-05-22 02:09:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-05-22 02:09:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-05-22 02:09:29,484 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-05-22 02:09:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:29,484 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-05-22 02:09:29,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-05-22 02:09:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:29,502 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:29,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:29,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-22 02:09:29,702 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-05-22 02:09:29,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836721466] [2021-05-22 02:09:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:29,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:29,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836721466] [2021-05-22 02:09:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836721466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:29,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124167648] [2021-05-22 02:09:29,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:29,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:29,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124167648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:29,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:29,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588886109] [2021-05-22 02:09:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:29,894 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:30,558 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-05-22 02:09:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:09:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:30,580 INFO L225 Difference]: With dead ends: 12450 [2021-05-22 02:09:30,580 INFO L226 Difference]: Without dead ends: 12408 [2021-05-22 02:09:30,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:09:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-05-22 02:09:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-05-22 02:09:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-05-22 02:09:30,769 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-05-22 02:09:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:30,769 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-05-22 02:09:30,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-05-22 02:09:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:30,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:30,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:30,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:30,986 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-05-22 02:09:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:30,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070810491] [2021-05-22 02:09:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070810491] [2021-05-22 02:09:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070810491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251321625] [2021-05-22 02:09:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:31,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:09:31,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:31,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251321625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:31,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:31,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:09:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499916494] [2021-05-22 02:09:31,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:31,148 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:31,672 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-05-22 02:09:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:09:31,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:31,703 INFO L225 Difference]: With dead ends: 15314 [2021-05-22 02:09:31,704 INFO L226 Difference]: Without dead ends: 15307 [2021-05-22 02:09:31,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:09:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-05-22 02:09:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-05-22 02:09:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-05-22 02:09:31,907 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-05-22 02:09:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:31,907 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-05-22 02:09:31,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-05-22 02:09:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:31,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:31,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:32,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:32,125 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-05-22 02:09:32,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:32,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020455697] [2021-05-22 02:09:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020455697] [2021-05-22 02:09:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020455697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898523768] [2021-05-22 02:09:32,160 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:32,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:09:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:32,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:32,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898523768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:32,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:32,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791302788] [2021-05-22 02:09:32,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:32,297 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:32,784 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-05-22 02:09:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:09:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:32,809 INFO L225 Difference]: With dead ends: 12355 [2021-05-22 02:09:32,809 INFO L226 Difference]: Without dead ends: 12316 [2021-05-22 02:09:32,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:09:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-05-22 02:09:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-05-22 02:09:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-05-22 02:09:33,005 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-05-22 02:09:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:33,006 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-05-22 02:09:33,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-05-22 02:09:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:33,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:33,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:33,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:33,224 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-05-22 02:09:33,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:33,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592884601] [2021-05-22 02:09:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592884601] [2021-05-22 02:09:33,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592884601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319210230] [2021-05-22 02:09:33,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319210230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:33,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:33,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:09:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414845613] [2021-05-22 02:09:33,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:09:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:09:33,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:09:33,386 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:33,786 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-05-22 02:09:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:09:33,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:33,815 INFO L225 Difference]: With dead ends: 14434 [2021-05-22 02:09:33,815 INFO L226 Difference]: Without dead ends: 14427 [2021-05-22 02:09:33,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:09:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-05-22 02:09:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-05-22 02:09:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-05-22 02:09:34,040 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-05-22 02:09:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:34,040 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-05-22 02:09:34,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-05-22 02:09:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:34,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:34,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:34,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:34,260 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-05-22 02:09:34,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:34,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477859183] [2021-05-22 02:09:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:34,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477859183] [2021-05-22 02:09:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477859183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557789690] [2021-05-22 02:09:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:34,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557789690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:34,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:09:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025281631] [2021-05-22 02:09:34,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:09:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:09:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:09:34,425 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:35,530 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-05-22 02:09:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:09:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:35,568 INFO L225 Difference]: With dead ends: 18950 [2021-05-22 02:09:35,568 INFO L226 Difference]: Without dead ends: 18922 [2021-05-22 02:09:35,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:09:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-05-22 02:09:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-05-22 02:09:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-05-22 02:09:35,850 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-05-22 02:09:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:35,850 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-05-22 02:09:35,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-05-22 02:09:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:35,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:35,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:36,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-22 02:09:36,071 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-05-22 02:09:36,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:36,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952876412] [2021-05-22 02:09:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952876412] [2021-05-22 02:09:36,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952876412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672510650] [2021-05-22 02:09:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:36,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:36,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672510650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:36,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:36,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:36,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140736957] [2021-05-22 02:09:36,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:36,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:36,237 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:37,294 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-05-22 02:09:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:09:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:37,320 INFO L225 Difference]: With dead ends: 13312 [2021-05-22 02:09:37,320 INFO L226 Difference]: Without dead ends: 13300 [2021-05-22 02:09:37,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:09:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-05-22 02:09:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-05-22 02:09:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-05-22 02:09:37,526 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-05-22 02:09:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:37,526 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-05-22 02:09:37,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-05-22 02:09:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:37,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:37,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:37,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:37,744 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-05-22 02:09:37,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:37,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287853952] [2021-05-22 02:09:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:37,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287853952] [2021-05-22 02:09:37,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287853952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884272492] [2021-05-22 02:09:37,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:37,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884272492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:37,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:37,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:09:37,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065157819] [2021-05-22 02:09:37,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:09:37,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:09:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:09:37,918 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:38,764 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-05-22 02:09:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:09:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:38,790 INFO L225 Difference]: With dead ends: 12947 [2021-05-22 02:09:38,790 INFO L226 Difference]: Without dead ends: 12926 [2021-05-22 02:09:38,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:09:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-05-22 02:09:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-05-22 02:09:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-05-22 02:09:39,021 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-05-22 02:09:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:39,021 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-05-22 02:09:39,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-05-22 02:09:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:39,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:39,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:39,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-22 02:09:39,238 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-05-22 02:09:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:39,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630169119] [2021-05-22 02:09:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:39,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:39,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630169119] [2021-05-22 02:09:39,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630169119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608568119] [2021-05-22 02:09:39,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:39,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:09:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:39,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608568119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:39,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:39,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:39,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179313463] [2021-05-22 02:09:39,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:39,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:39,401 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:40,190 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-05-22 02:09:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:09:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:40,217 INFO L225 Difference]: With dead ends: 13151 [2021-05-22 02:09:40,217 INFO L226 Difference]: Without dead ends: 13088 [2021-05-22 02:09:40,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:09:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-05-22 02:09:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-05-22 02:09:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-05-22 02:09:40,416 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-05-22 02:09:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:40,416 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-05-22 02:09:40,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-05-22 02:09:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:40,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:40,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:40,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-22 02:09:40,634 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-05-22 02:09:40,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:40,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286012722] [2021-05-22 02:09:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:40,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286012722] [2021-05-22 02:09:40,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286012722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119704917] [2021-05-22 02:09:40,673 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:40,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:09:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:40,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119704917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:40,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:40,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:09:40,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176551100] [2021-05-22 02:09:40,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:09:40,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:09:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:09:40,795 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:41,643 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-05-22 02:09:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:09:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:41,701 INFO L225 Difference]: With dead ends: 25464 [2021-05-22 02:09:41,701 INFO L226 Difference]: Without dead ends: 25450 [2021-05-22 02:09:41,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:09:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-05-22 02:09:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-05-22 02:09:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-05-22 02:09:42,070 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-05-22 02:09:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:42,070 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-05-22 02:09:42,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-05-22 02:09:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:42,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:42,091 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-22 02:09:42,292 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-05-22 02:09:42,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:42,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008487287] [2021-05-22 02:09:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:42,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008487287] [2021-05-22 02:09:42,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008487287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790611937] [2021-05-22 02:09:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:42,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:42,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790611937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:42,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:42,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192517211] [2021-05-22 02:09:42,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:42,455 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:43,455 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-05-22 02:09:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:09:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:43,486 INFO L225 Difference]: With dead ends: 16105 [2021-05-22 02:09:43,486 INFO L226 Difference]: Without dead ends: 16097 [2021-05-22 02:09:43,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:09:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-05-22 02:09:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-05-22 02:09:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-05-22 02:09:43,746 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-05-22 02:09:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:43,746 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-05-22 02:09:43,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-05-22 02:09:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:43,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:43,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:43,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-22 02:09:43,969 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-05-22 02:09:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:43,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95314929] [2021-05-22 02:09:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:44,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:44,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95314929] [2021-05-22 02:09:44,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95314929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:44,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196090271] [2021-05-22 02:09:44,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:44,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:44,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196090271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:44,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:44,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403175580] [2021-05-22 02:09:44,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:44,133 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:45,547 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-05-22 02:09:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:09:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:45,580 INFO L225 Difference]: With dead ends: 16652 [2021-05-22 02:09:45,580 INFO L226 Difference]: Without dead ends: 16644 [2021-05-22 02:09:45,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 989.4ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:09:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-05-22 02:09:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-05-22 02:09:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-05-22 02:09:45,869 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-05-22 02:09:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:45,869 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-05-22 02:09:45,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-05-22 02:09:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:45,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:45,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:46,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:46,093 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-05-22 02:09:46,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:46,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441747438] [2021-05-22 02:09:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:46,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:46,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441747438] [2021-05-22 02:09:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441747438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:46,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294561470] [2021-05-22 02:09:46,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294561470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:46,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:46,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214680070] [2021-05-22 02:09:46,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:46,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:46,267 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:47,294 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-05-22 02:09:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:09:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:47,326 INFO L225 Difference]: With dead ends: 16318 [2021-05-22 02:09:47,327 INFO L226 Difference]: Without dead ends: 16297 [2021-05-22 02:09:47,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:09:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-05-22 02:09:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-05-22 02:09:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-05-22 02:09:47,691 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-05-22 02:09:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:47,691 INFO L482 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-05-22 02:09:47,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-05-22 02:09:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:47,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:47,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:47,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:47,915 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:47,915 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-05-22 02:09:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:47,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766060370] [2021-05-22 02:09:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:47,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766060370] [2021-05-22 02:09:47,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766060370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325328662] [2021-05-22 02:09:47,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:47,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:48,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325328662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:48,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:48,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:48,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574471704] [2021-05-22 02:09:48,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:48,080 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:49,272 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-05-22 02:09:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:09:49,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:49,306 INFO L225 Difference]: With dead ends: 17791 [2021-05-22 02:09:49,306 INFO L226 Difference]: Without dead ends: 17783 [2021-05-22 02:09:49,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 771.9ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:09:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-05-22 02:09:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-05-22 02:09:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-05-22 02:09:49,572 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-05-22 02:09:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-05-22 02:09:49,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-05-22 02:09:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:49,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:49,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:49,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-22 02:09:49,796 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-05-22 02:09:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181905172] [2021-05-22 02:09:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:49,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:49,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181905172] [2021-05-22 02:09:49,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181905172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:49,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665889142] [2021-05-22 02:09:49,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:49,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:09:49,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:09:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665889142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:49,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:49,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:09:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402956794] [2021-05-22 02:09:49,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:09:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:09:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:09:49,956 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:50,718 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-05-22 02:09:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:09:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:50,762 INFO L225 Difference]: With dead ends: 22000 [2021-05-22 02:09:50,762 INFO L226 Difference]: Without dead ends: 21980 [2021-05-22 02:09:50,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:09:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-05-22 02:09:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-05-22 02:09:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-05-22 02:09:51,203 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-05-22 02:09:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:51,203 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-05-22 02:09:51,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-05-22 02:09:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:51,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:51,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:51,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-22 02:09:51,441 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-05-22 02:09:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606988055] [2021-05-22 02:09:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:51,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606988055] [2021-05-22 02:09:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606988055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110099786] [2021-05-22 02:09:51,521 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:51,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:09:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110099786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:51,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:51,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:51,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014998295] [2021-05-22 02:09:51,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:51,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:51,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:51,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:51,664 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:52,372 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-05-22 02:09:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:09:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:52,401 INFO L225 Difference]: With dead ends: 16102 [2021-05-22 02:09:52,401 INFO L226 Difference]: Without dead ends: 16063 [2021-05-22 02:09:52,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 549.2ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:09:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-05-22 02:09:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-05-22 02:09:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-05-22 02:09:52,667 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-05-22 02:09:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:52,667 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-05-22 02:09:52,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-05-22 02:09:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:52,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:52,689 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:52,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-22 02:09:52,893 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-05-22 02:09:52,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:52,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535400506] [2021-05-22 02:09:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:52,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535400506] [2021-05-22 02:09:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535400506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759288086] [2021-05-22 02:09:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:53,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759288086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:53,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:53,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:53,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238097140] [2021-05-22 02:09:53,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:53,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:53,059 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:53,692 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-05-22 02:09:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:09:53,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:53,730 INFO L225 Difference]: With dead ends: 16364 [2021-05-22 02:09:53,730 INFO L226 Difference]: Without dead ends: 16325 [2021-05-22 02:09:53,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:09:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-05-22 02:09:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-05-22 02:09:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-05-22 02:09:54,180 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-05-22 02:09:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:54,180 INFO L482 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-05-22 02:09:54,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-05-22 02:09:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:54,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:54,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:54,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:54,405 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-05-22 02:09:54,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:54,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583059617] [2021-05-22 02:09:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:54,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583059617] [2021-05-22 02:09:54,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583059617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683047728] [2021-05-22 02:09:54,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:54,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:09:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:54,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683047728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:54,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:54,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:54,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981839210] [2021-05-22 02:09:54,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:54,582 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:55,430 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-05-22 02:09:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:09:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:55,467 INFO L225 Difference]: With dead ends: 17402 [2021-05-22 02:09:55,467 INFO L226 Difference]: Without dead ends: 17346 [2021-05-22 02:09:55,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:09:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-05-22 02:09:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-05-22 02:09:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-05-22 02:09:55,784 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-05-22 02:09:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:55,784 INFO L482 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-05-22 02:09:55,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-05-22 02:09:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:55,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:55,806 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:56,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:56,008 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-05-22 02:09:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698358431] [2021-05-22 02:09:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:56,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:56,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698358431] [2021-05-22 02:09:56,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698358431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:56,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554990297] [2021-05-22 02:09:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:56,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:09:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:56,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554990297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:56,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:56,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762741040] [2021-05-22 02:09:56,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:56,175 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:57,287 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-05-22 02:09:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:09:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:57,325 INFO L225 Difference]: With dead ends: 17837 [2021-05-22 02:09:57,325 INFO L226 Difference]: Without dead ends: 17809 [2021-05-22 02:09:57,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:09:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-05-22 02:09:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-05-22 02:09:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-05-22 02:09:57,734 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-05-22 02:09:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:57,734 INFO L482 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-05-22 02:09:57,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-05-22 02:09:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:57,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:57,756 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:57,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-22 02:09:57,956 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-05-22 02:09:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317941174] [2021-05-22 02:09:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:57,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:57,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317941174] [2021-05-22 02:09:57,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317941174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:57,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941370389] [2021-05-22 02:09:57,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:09:58,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:09:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:09:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:09:58,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:09:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:58,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941370389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:58,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:09:58,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:09:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367239271] [2021-05-22 02:09:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:09:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:09:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:09:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:09:58,128 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:09:59,405 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-05-22 02:09:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 02:09:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:09:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:09:59,438 INFO L225 Difference]: With dead ends: 18031 [2021-05-22 02:09:59,438 INFO L226 Difference]: Without dead ends: 18031 [2021-05-22 02:09:59,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 952.5ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-05-22 02:09:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-05-22 02:09:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-05-22 02:09:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-05-22 02:09:59,726 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-05-22 02:09:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:09:59,727 INFO L482 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-05-22 02:09:59,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:09:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-05-22 02:09:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:09:59,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:09:59,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:09:59,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-22 02:09:59,949 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:09:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:09:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-05-22 02:09:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:09:59,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89351473] [2021-05-22 02:09:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:09:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:09:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:09:59,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:09:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89351473] [2021-05-22 02:09:59,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89351473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:09:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664232206] [2021-05-22 02:09:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:10:00,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:10:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664232206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498579116] [2021-05-22 02:10:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:00,118 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:02,091 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-05-22 02:10:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-22 02:10:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:02,176 INFO L225 Difference]: With dead ends: 35647 [2021-05-22 02:10:02,177 INFO L226 Difference]: Without dead ends: 35617 [2021-05-22 02:10:02,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1271.7ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:10:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-05-22 02:10:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-05-22 02:10:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-05-22 02:10:02,696 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-05-22 02:10:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:02,696 INFO L482 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-05-22 02:10:02,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-05-22 02:10:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:02,726 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:02,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:02,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:02,927 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-05-22 02:10:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:02,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488393697] [2021-05-22 02:10:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:02,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:02,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488393697] [2021-05-22 02:10:02,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488393697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:02,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850306923] [2021-05-22 02:10:02,958 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:02,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:10:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:03,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850306923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:03,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:03,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313727399] [2021-05-22 02:10:03,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:03,189 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:05,259 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-05-22 02:10:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:10:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:05,361 INFO L225 Difference]: With dead ends: 41975 [2021-05-22 02:10:05,362 INFO L226 Difference]: Without dead ends: 41947 [2021-05-22 02:10:05,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1472.6ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:10:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-05-22 02:10:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-05-22 02:10:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-05-22 02:10:06,019 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-05-22 02:10:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:06,019 INFO L482 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-05-22 02:10:06,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-05-22 02:10:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:06,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:06,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:06,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-22 02:10:06,266 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-05-22 02:10:06,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:06,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244896438] [2021-05-22 02:10:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:06,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:06,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244896438] [2021-05-22 02:10:06,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244896438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:06,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260081782] [2021-05-22 02:10:06,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:06,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260081782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:06,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3108554] [2021-05-22 02:10:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:06,414 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:08,504 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-05-22 02:10:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:10:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:08,602 INFO L225 Difference]: With dead ends: 36580 [2021-05-22 02:10:08,602 INFO L226 Difference]: Without dead ends: 36556 [2021-05-22 02:10:08,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1295.7ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:10:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-05-22 02:10:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-05-22 02:10:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-05-22 02:10:09,407 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-05-22 02:10:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:09,407 INFO L482 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-05-22 02:10:09,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-05-22 02:10:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:09,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:09,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:09,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:09,657 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-05-22 02:10:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835177196] [2021-05-22 02:10:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:09,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:09,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835177196] [2021-05-22 02:10:09,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835177196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:09,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207721962] [2021-05-22 02:10:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:09,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:09,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207721962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:09,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:09,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:09,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992370584] [2021-05-22 02:10:09,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:09,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:09,835 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:11,519 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-05-22 02:10:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:10:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:11,625 INFO L225 Difference]: With dead ends: 41528 [2021-05-22 02:10:11,625 INFO L226 Difference]: Without dead ends: 41528 [2021-05-22 02:10:11,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1055.8ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:10:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-05-22 02:10:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-05-22 02:10:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-05-22 02:10:12,354 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-05-22 02:10:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:12,355 INFO L482 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-05-22 02:10:12,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-05-22 02:10:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:12,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:12,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:12,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-22 02:10:12,599 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-05-22 02:10:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:12,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690840953] [2021-05-22 02:10:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:12,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690840953] [2021-05-22 02:10:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690840953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338936581] [2021-05-22 02:10:12,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:12,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:10:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:12,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338936581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:12,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:12,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583220885] [2021-05-22 02:10:12,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:12,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:12,758 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:14,349 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-05-22 02:10:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:10:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:14,419 INFO L225 Difference]: With dead ends: 27513 [2021-05-22 02:10:14,420 INFO L226 Difference]: Without dead ends: 27489 [2021-05-22 02:10:14,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1006.0ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:10:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-05-22 02:10:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-05-22 02:10:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-05-22 02:10:15,007 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-05-22 02:10:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:15,007 INFO L482 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-05-22 02:10:15,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-05-22 02:10:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:15,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:15,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:15,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:15,253 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-05-22 02:10:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:15,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875740704] [2021-05-22 02:10:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:15,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875740704] [2021-05-22 02:10:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875740704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127641770] [2021-05-22 02:10:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:15,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:15,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:15,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:15,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127641770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:15,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:15,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068160413] [2021-05-22 02:10:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:15,396 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:16,574 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-05-22 02:10:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:10:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:16,639 INFO L225 Difference]: With dead ends: 26218 [2021-05-22 02:10:16,640 INFO L226 Difference]: Without dead ends: 26184 [2021-05-22 02:10:16,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:10:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-05-22 02:10:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-05-22 02:10:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-05-22 02:10:17,208 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-05-22 02:10:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:17,208 INFO L482 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-05-22 02:10:17,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-05-22 02:10:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:17,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:17,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:17,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-22 02:10:17,457 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-05-22 02:10:17,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:17,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298028847] [2021-05-22 02:10:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298028847] [2021-05-22 02:10:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298028847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845364386] [2021-05-22 02:10:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:17,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:17,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:17,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845364386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:17,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:17,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:17,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119001848] [2021-05-22 02:10:17,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:17,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:17,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:17,612 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:19,449 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-05-22 02:10:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:10:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:19,566 INFO L225 Difference]: With dead ends: 44899 [2021-05-22 02:10:19,566 INFO L226 Difference]: Without dead ends: 44892 [2021-05-22 02:10:19,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1160.5ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:10:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-05-22 02:10:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-05-22 02:10:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-05-22 02:10:20,498 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-05-22 02:10:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:20,498 INFO L482 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-05-22 02:10:20,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-05-22 02:10:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:20,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:20,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:20,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:20,753 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-05-22 02:10:20,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:20,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810855637] [2021-05-22 02:10:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:20,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810855637] [2021-05-22 02:10:20,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810855637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:20,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403412344] [2021-05-22 02:10:20,790 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:20,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:10:20,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403412344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:20,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735197760] [2021-05-22 02:10:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:20,942 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:22,890 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-05-22 02:10:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:10:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:22,996 INFO L225 Difference]: With dead ends: 37958 [2021-05-22 02:10:22,997 INFO L226 Difference]: Without dead ends: 37918 [2021-05-22 02:10:22,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:10:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-05-22 02:10:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-05-22 02:10:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-05-22 02:10:23,609 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-05-22 02:10:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:23,609 INFO L482 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-05-22 02:10:23,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-05-22 02:10:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:23,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:23,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:23,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:23,864 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-05-22 02:10:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749778735] [2021-05-22 02:10:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:23,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:23,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749778735] [2021-05-22 02:10:23,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749778735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:23,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951860523] [2021-05-22 02:10:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951860523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:24,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:24,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:24,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035858226] [2021-05-22 02:10:24,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:24,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:24,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:24,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:24,026 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:26,451 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-05-22 02:10:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:10:26,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:26,567 INFO L225 Difference]: With dead ends: 43788 [2021-05-22 02:10:26,567 INFO L226 Difference]: Without dead ends: 43753 [2021-05-22 02:10:26,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1602.6ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:10:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-05-22 02:10:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-05-22 02:10:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-05-22 02:10:27,213 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-05-22 02:10:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:27,213 INFO L482 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-05-22 02:10:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-05-22 02:10:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:27,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:27,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:27,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:27,473 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-05-22 02:10:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:27,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106132721] [2021-05-22 02:10:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:27,641 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-22 02:10:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106132721] [2021-05-22 02:10:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106132721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378330653] [2021-05-22 02:10:27,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:27,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:27,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378330653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:27,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:27,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858189799] [2021-05-22 02:10:27,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:27,784 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:28,994 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-05-22 02:10:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:10:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:29,091 INFO L225 Difference]: With dead ends: 34933 [2021-05-22 02:10:29,091 INFO L226 Difference]: Without dead ends: 34912 [2021-05-22 02:10:29,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 924.5ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:10:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-05-22 02:10:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-05-22 02:10:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-05-22 02:10:29,691 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-05-22 02:10:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:29,691 INFO L482 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-05-22 02:10:29,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-05-22 02:10:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:29,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:29,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:30,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-22 02:10:30,101 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-05-22 02:10:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:30,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115430604] [2021-05-22 02:10:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:30,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115430604] [2021-05-22 02:10:30,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115430604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164565729] [2021-05-22 02:10:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:30,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:10:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:30,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164565729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:30,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:30,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:30,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839017559] [2021-05-22 02:10:30,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:30,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:30,272 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:31,177 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-05-22 02:10:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:10:31,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:31,279 INFO L225 Difference]: With dead ends: 39052 [2021-05-22 02:10:31,279 INFO L226 Difference]: Without dead ends: 39052 [2021-05-22 02:10:31,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:10:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-05-22 02:10:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-05-22 02:10:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-05-22 02:10:32,110 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-05-22 02:10:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:32,111 INFO L482 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-05-22 02:10:32,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-05-22 02:10:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:32,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:32,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:32,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:32,377 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-05-22 02:10:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:32,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319027111] [2021-05-22 02:10:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319027111] [2021-05-22 02:10:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319027111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271738692] [2021-05-22 02:10:32,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:32,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:32,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:32,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271738692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:32,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:32,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:32,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303378958] [2021-05-22 02:10:32,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:32,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:32,579 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:34,709 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-05-22 02:10:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:10:34,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:34,806 INFO L225 Difference]: With dead ends: 36484 [2021-05-22 02:10:34,806 INFO L226 Difference]: Without dead ends: 36484 [2021-05-22 02:10:34,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1189.7ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:10:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-05-22 02:10:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-05-22 02:10:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-05-22 02:10:35,519 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-05-22 02:10:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:35,519 INFO L482 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-05-22 02:10:35,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-05-22 02:10:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:35,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:35,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:35,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-22 02:10:35,779 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:35,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-05-22 02:10:35,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:35,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819930478] [2021-05-22 02:10:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:35,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:35,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819930478] [2021-05-22 02:10:35,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819930478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:35,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458218702] [2021-05-22 02:10:35,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:35,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:10:35,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:35,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458218702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:35,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:35,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:35,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176102758] [2021-05-22 02:10:35,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:35,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:35,987 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:36,711 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-22 02:10:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:37,986 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-05-22 02:10:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:10:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:38,091 INFO L225 Difference]: With dead ends: 36924 [2021-05-22 02:10:38,092 INFO L226 Difference]: Without dead ends: 36924 [2021-05-22 02:10:38,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1372.6ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:10:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-05-22 02:10:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-05-22 02:10:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-05-22 02:10:38,890 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-05-22 02:10:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:38,891 INFO L482 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-05-22 02:10:38,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-05-22 02:10:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:38,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:38,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:39,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-22 02:10:39,149 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-05-22 02:10:39,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:39,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088405543] [2021-05-22 02:10:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:39,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088405543] [2021-05-22 02:10:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088405543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91335443] [2021-05-22 02:10:39,183 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:39,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:39,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:39,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91335443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:39,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:39,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:39,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998347908] [2021-05-22 02:10:39,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:39,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:39,324 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:40,327 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-05-22 02:10:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:10:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:40,422 INFO L225 Difference]: With dead ends: 36712 [2021-05-22 02:10:40,422 INFO L226 Difference]: Without dead ends: 36694 [2021-05-22 02:10:40,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 523.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:10:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-05-22 02:10:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-05-22 02:10:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-05-22 02:10:41,161 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-05-22 02:10:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:41,161 INFO L482 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-05-22 02:10:41,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-05-22 02:10:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:41,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:41,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:41,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:41,404 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-05-22 02:10:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:41,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868914953] [2021-05-22 02:10:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:41,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868914953] [2021-05-22 02:10:41,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868914953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520079304] [2021-05-22 02:10:41,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:41,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:41,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520079304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:41,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:41,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319704152] [2021-05-22 02:10:41,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:41,597 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:43,454 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-05-22 02:10:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:10:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:43,539 INFO L225 Difference]: With dead ends: 30537 [2021-05-22 02:10:43,540 INFO L226 Difference]: Without dead ends: 30533 [2021-05-22 02:10:43,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1223.8ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:10:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-05-22 02:10:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-05-22 02:10:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-05-22 02:10:44,235 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-05-22 02:10:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:44,235 INFO L482 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-05-22 02:10:44,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-05-22 02:10:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:44,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:44,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:44,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:44,497 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-05-22 02:10:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:44,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674061470] [2021-05-22 02:10:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:44,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674061470] [2021-05-22 02:10:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674061470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675426587] [2021-05-22 02:10:44,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:44,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:44,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:44,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675426587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:44,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:44,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169067153] [2021-05-22 02:10:44,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:44,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:44,686 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:46,436 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-05-22 02:10:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:10:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:46,518 INFO L225 Difference]: With dead ends: 30537 [2021-05-22 02:10:46,518 INFO L226 Difference]: Without dead ends: 30531 [2021-05-22 02:10:46,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:10:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-05-22 02:10:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-05-22 02:10:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-05-22 02:10:47,172 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-05-22 02:10:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:47,172 INFO L482 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-05-22 02:10:47,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-05-22 02:10:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:47,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:47,220 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:47,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-22 02:10:47,421 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-05-22 02:10:47,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329330212] [2021-05-22 02:10:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:47,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:47,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329330212] [2021-05-22 02:10:47,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329330212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:47,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459789841] [2021-05-22 02:10:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:10:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:47,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459789841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:47,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:47,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:47,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353671670] [2021-05-22 02:10:47,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:47,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:47,608 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:49,106 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-05-22 02:10:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:10:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:49,171 INFO L225 Difference]: With dead ends: 26398 [2021-05-22 02:10:49,171 INFO L226 Difference]: Without dead ends: 26377 [2021-05-22 02:10:49,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:10:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-05-22 02:10:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-05-22 02:10:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-05-22 02:10:49,790 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-05-22 02:10:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:49,790 INFO L482 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-05-22 02:10:49,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-05-22 02:10:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:49,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:49,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:50,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:50,049 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-05-22 02:10:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:50,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159193216] [2021-05-22 02:10:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:50,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159193216] [2021-05-22 02:10:50,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159193216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328174305] [2021-05-22 02:10:50,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:50,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:10:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:50,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328174305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:50,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:50,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:50,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947372651] [2021-05-22 02:10:50,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:50,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:50,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:50,226 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:51,322 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-22 02:10:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:51,797 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-05-22 02:10:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:10:51,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:51,868 INFO L225 Difference]: With dead ends: 26773 [2021-05-22 02:10:51,868 INFO L226 Difference]: Without dead ends: 26767 [2021-05-22 02:10:51,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:10:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-05-22 02:10:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-05-22 02:10:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-05-22 02:10:52,493 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-05-22 02:10:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:52,494 INFO L482 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-05-22 02:10:52,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-05-22 02:10:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:52,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:52,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:52,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:52,741 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-05-22 02:10:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334825673] [2021-05-22 02:10:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:52,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:52,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334825673] [2021-05-22 02:10:52,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334825673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:52,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094102274] [2021-05-22 02:10:52,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:52,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:10:52,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:10:52,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:52,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094102274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:52,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:52,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:10:52,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938323489] [2021-05-22 02:10:52,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:10:52,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:52,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:10:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:10:52,915 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:53,666 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-05-22 02:10:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:10:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:53,761 INFO L225 Difference]: With dead ends: 34026 [2021-05-22 02:10:53,761 INFO L226 Difference]: Without dead ends: 33998 [2021-05-22 02:10:53,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:10:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-05-22 02:10:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-05-22 02:10:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-05-22 02:10:54,458 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-05-22 02:10:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:54,458 INFO L482 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-05-22 02:10:54,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-05-22 02:10:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:54,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:54,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:54,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:54,705 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-05-22 02:10:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:54,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29679978] [2021-05-22 02:10:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:54,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:54,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29679978] [2021-05-22 02:10:54,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29679978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:54,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320143389] [2021-05-22 02:10:54,742 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:54,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:10:54,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:54,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:54,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:54,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320143389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:54,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:54,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270266845] [2021-05-22 02:10:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:54,876 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:55,247 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-05-22 02:10:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:56,109 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-05-22 02:10:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:10:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:56,184 INFO L225 Difference]: With dead ends: 27117 [2021-05-22 02:10:56,184 INFO L226 Difference]: Without dead ends: 27075 [2021-05-22 02:10:56,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:10:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-05-22 02:10:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-05-22 02:10:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-05-22 02:10:56,749 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-05-22 02:10:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:56,749 INFO L482 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-05-22 02:10:56,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-05-22 02:10:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:56,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:56,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:56,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-05-22 02:10:56,990 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-05-22 02:10:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:56,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265548265] [2021-05-22 02:10:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:57,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:57,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265548265] [2021-05-22 02:10:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265548265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:57,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119742031] [2021-05-22 02:10:57,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:57,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119742031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:57,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:57,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336839558] [2021-05-22 02:10:57,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:57,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:57,177 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:10:58,575 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-05-22 02:10:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:10:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:10:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:10:58,664 INFO L225 Difference]: With dead ends: 28292 [2021-05-22 02:10:58,664 INFO L226 Difference]: Without dead ends: 28257 [2021-05-22 02:10:58,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:10:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-05-22 02:10:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-05-22 02:10:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-05-22 02:10:59,305 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-05-22 02:10:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:10:59,305 INFO L482 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-05-22 02:10:59,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:10:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-05-22 02:10:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:10:59,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:10:59,348 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:10:59,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-22 02:10:59,550 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:10:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:10:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-05-22 02:10:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:10:59,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872431310] [2021-05-22 02:10:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:10:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:10:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:59,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:10:59,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872431310] [2021-05-22 02:10:59,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872431310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62047060] [2021-05-22 02:10:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:10:59,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:10:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:10:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:10:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:10:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:10:59,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62047060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:10:59,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:10:59,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:10:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864886301] [2021-05-22 02:10:59,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:10:59,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:10:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:10:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:10:59,841 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:01,217 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-05-22 02:11:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:11:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:01,283 INFO L225 Difference]: With dead ends: 28749 [2021-05-22 02:11:01,283 INFO L226 Difference]: Without dead ends: 28749 [2021-05-22 02:11:01,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:11:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-05-22 02:11:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-05-22 02:11:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-05-22 02:11:01,796 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-05-22 02:11:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:01,797 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-05-22 02:11:01,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-05-22 02:11:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:01,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:01,921 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:02,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-22 02:11:02,122 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-05-22 02:11:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:02,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982659688] [2021-05-22 02:11:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:02,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982659688] [2021-05-22 02:11:02,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982659688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759787995] [2021-05-22 02:11:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:02,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:11:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:02,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759787995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:02,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:11:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777040560] [2021-05-22 02:11:02,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:11:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:11:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:11:02,398 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:03,980 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-05-22 02:11:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:11:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:04,077 INFO L225 Difference]: With dead ends: 29221 [2021-05-22 02:11:04,077 INFO L226 Difference]: Without dead ends: 29217 [2021-05-22 02:11:04,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1046.5ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:11:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-05-22 02:11:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-05-22 02:11:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-05-22 02:11:04,631 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-05-22 02:11:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:04,632 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-05-22 02:11:04,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-05-22 02:11:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:04,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:04,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:05,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-22 02:11:05,002 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:05,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-05-22 02:11:05,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:05,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503042625] [2021-05-22 02:11:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:05,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:05,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503042625] [2021-05-22 02:11:05,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503042625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:05,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080776547] [2021-05-22 02:11:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:05,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080776547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:05,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:05,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:11:05,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344877696] [2021-05-22 02:11:05,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:11:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:11:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:11:05,178 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:06,751 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-05-22 02:11:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:11:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:06,840 INFO L225 Difference]: With dead ends: 29744 [2021-05-22 02:11:06,840 INFO L226 Difference]: Without dead ends: 29744 [2021-05-22 02:11:06,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 935.0ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:11:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-05-22 02:11:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-05-22 02:11:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-05-22 02:11:07,471 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-05-22 02:11:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:07,471 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-05-22 02:11:07,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-05-22 02:11:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:07,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:07,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:07,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-22 02:11:07,852 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-05-22 02:11:07,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:07,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948105688] [2021-05-22 02:11:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:07,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948105688] [2021-05-22 02:11:07,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948105688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557078560] [2021-05-22 02:11:07,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:07,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:11:07,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:07,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:08,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557078560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:08,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:08,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:08,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987397213] [2021-05-22 02:11:08,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:08,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:08,043 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:08,221 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-05-22 02:11:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:08,971 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-05-22 02:11:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:11:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:09,046 INFO L225 Difference]: With dead ends: 27264 [2021-05-22 02:11:09,047 INFO L226 Difference]: Without dead ends: 27186 [2021-05-22 02:11:09,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:11:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-05-22 02:11:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-05-22 02:11:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-05-22 02:11:09,710 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-05-22 02:11:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:09,710 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-05-22 02:11:09,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-05-22 02:11:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:09,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:09,752 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:09,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:09,967 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-05-22 02:11:09,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:09,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263324764] [2021-05-22 02:11:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:10,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263324764] [2021-05-22 02:11:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263324764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628877804] [2021-05-22 02:11:10,000 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:11:10,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:11:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628877804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:10,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:10,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711200955] [2021-05-22 02:11:10,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:10,140 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:11,095 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-05-22 02:11:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:11:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:11,171 INFO L225 Difference]: With dead ends: 27092 [2021-05-22 02:11:11,171 INFO L226 Difference]: Without dead ends: 27014 [2021-05-22 02:11:11,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:11:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-05-22 02:11:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-05-22 02:11:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-05-22 02:11:11,804 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-05-22 02:11:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:11,804 INFO L482 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-05-22 02:11:11,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-05-22 02:11:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:11,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:11,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:12,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-22 02:11:12,069 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-05-22 02:11:12,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:12,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260345524] [2021-05-22 02:11:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:12,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:12,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260345524] [2021-05-22 02:11:12,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260345524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:12,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935323275] [2021-05-22 02:11:12,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:12,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935323275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:12,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:12,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:12,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142557720] [2021-05-22 02:11:12,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:12,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:12,270 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:13,270 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-05-22 02:11:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:13,601 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-05-22 02:11:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:11:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:13,680 INFO L225 Difference]: With dead ends: 29237 [2021-05-22 02:11:13,681 INFO L226 Difference]: Without dead ends: 29132 [2021-05-22 02:11:13,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:11:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-05-22 02:11:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-05-22 02:11:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-05-22 02:11:14,375 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-05-22 02:11:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:14,375 INFO L482 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-05-22 02:11:14,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-05-22 02:11:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:14,421 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:14,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:14,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-22 02:11:14,621 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-05-22 02:11:14,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:14,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793508755] [2021-05-22 02:11:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:14,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793508755] [2021-05-22 02:11:14,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793508755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041344874] [2021-05-22 02:11:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:14,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:11:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:14,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041344874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:14,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:14,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:14,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488740284] [2021-05-22 02:11:14,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:14,793 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:16,294 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-05-22 02:11:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:11:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:16,375 INFO L225 Difference]: With dead ends: 30260 [2021-05-22 02:11:16,375 INFO L226 Difference]: Without dead ends: 30225 [2021-05-22 02:11:16,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:11:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-05-22 02:11:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-05-22 02:11:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-05-22 02:11:17,137 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-05-22 02:11:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:17,138 INFO L482 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-05-22 02:11:17,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-05-22 02:11:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:17,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:17,195 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:17,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:17,409 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-05-22 02:11:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:17,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203653203] [2021-05-22 02:11:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:17,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203653203] [2021-05-22 02:11:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203653203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184071202] [2021-05-22 02:11:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:17,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:11:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:17,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184071202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:17,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:17,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:17,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795617916] [2021-05-22 02:11:17,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:17,615 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:18,521 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-22 02:11:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:19,291 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-05-22 02:11:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:11:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:19,376 INFO L225 Difference]: With dead ends: 30555 [2021-05-22 02:11:19,376 INFO L226 Difference]: Without dead ends: 30555 [2021-05-22 02:11:19,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:11:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-05-22 02:11:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-05-22 02:11:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-05-22 02:11:20,081 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-05-22 02:11:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:20,081 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-05-22 02:11:20,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-05-22 02:11:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:20,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:20,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:20,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:20,337 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-05-22 02:11:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:20,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755557668] [2021-05-22 02:11:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:20,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755557668] [2021-05-22 02:11:20,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755557668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156371368] [2021-05-22 02:11:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:20,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156371368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:20,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:20,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803777018] [2021-05-22 02:11:20,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:20,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:20,538 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:21,615 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-05-22 02:11:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:11:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:21,693 INFO L225 Difference]: With dead ends: 29274 [2021-05-22 02:11:21,693 INFO L226 Difference]: Without dead ends: 29190 [2021-05-22 02:11:21,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:11:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-05-22 02:11:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-05-22 02:11:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-05-22 02:11:22,352 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-05-22 02:11:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:22,352 INFO L482 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-05-22 02:11:22,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-05-22 02:11:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:22,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:22,400 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:22,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:22,615 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-05-22 02:11:22,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:22,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232384117] [2021-05-22 02:11:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:22,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232384117] [2021-05-22 02:11:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232384117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612922098] [2021-05-22 02:11:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:11:22,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612922098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576814280] [2021-05-22 02:11:22,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:22,771 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:24,065 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-22 02:11:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:24,635 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-05-22 02:11:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:11:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:24,718 INFO L225 Difference]: With dead ends: 30288 [2021-05-22 02:11:24,718 INFO L226 Difference]: Without dead ends: 30239 [2021-05-22 02:11:24,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1351.2ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:11:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-05-22 02:11:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-05-22 02:11:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-05-22 02:11:25,454 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-05-22 02:11:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:25,454 INFO L482 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-05-22 02:11:25,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-05-22 02:11:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:25,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:25,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:25,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:25,713 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-05-22 02:11:25,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:25,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477870333] [2021-05-22 02:11:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:25,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:25,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477870333] [2021-05-22 02:11:25,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477870333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:25,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535114215] [2021-05-22 02:11:25,746 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:25,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:11:25,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:25,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535114215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:25,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:25,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:25,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020291634] [2021-05-22 02:11:25,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:25,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:25,886 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:27,450 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-05-22 02:11:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:11:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:27,530 INFO L225 Difference]: With dead ends: 30750 [2021-05-22 02:11:27,531 INFO L226 Difference]: Without dead ends: 30750 [2021-05-22 02:11:27,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1097.2ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:11:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-05-22 02:11:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-05-22 02:11:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-05-22 02:11:28,239 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-05-22 02:11:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:28,239 INFO L482 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-05-22 02:11:28,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-05-22 02:11:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:28,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:28,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:28,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-22 02:11:28,503 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:28,503 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-05-22 02:11:28,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:28,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369751141] [2021-05-22 02:11:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:28,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369751141] [2021-05-22 02:11:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369751141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917650849] [2021-05-22 02:11:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:28,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917650849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:28,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:28,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769222152] [2021-05-22 02:11:28,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:28,717 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:30,267 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-05-22 02:11:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:11:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:30,360 INFO L225 Difference]: With dead ends: 29361 [2021-05-22 02:11:30,360 INFO L226 Difference]: Without dead ends: 29361 [2021-05-22 02:11:30,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1033.1ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:11:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-05-22 02:11:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-05-22 02:11:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-05-22 02:11:31,106 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-05-22 02:11:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:31,106 INFO L482 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-05-22 02:11:31,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-05-22 02:11:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:31,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:31,149 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:31,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-22 02:11:31,349 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-05-22 02:11:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:31,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926946756] [2021-05-22 02:11:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:31,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:31,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926946756] [2021-05-22 02:11:31,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926946756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:31,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774932827] [2021-05-22 02:11:31,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:31,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:11:31,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774932827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:31,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:31,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38996354] [2021-05-22 02:11:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:31,513 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:32,656 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-05-22 02:11:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:11:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:32,727 INFO L225 Difference]: With dead ends: 28982 [2021-05-22 02:11:32,727 INFO L226 Difference]: Without dead ends: 28947 [2021-05-22 02:11:32,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:11:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-05-22 02:11:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-05-22 02:11:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-05-22 02:11:33,279 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-05-22 02:11:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:33,279 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-05-22 02:11:33,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-05-22 02:11:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:33,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:33,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:33,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-22 02:11:33,677 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-05-22 02:11:33,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:33,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287357392] [2021-05-22 02:11:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:33,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:33,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287357392] [2021-05-22 02:11:33,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287357392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:33,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006208086] [2021-05-22 02:11:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:33,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:11:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:33,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006208086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:33,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:33,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697625217] [2021-05-22 02:11:33,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:33,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:33,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:33,851 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:35,384 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-05-22 02:11:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:11:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:35,471 INFO L225 Difference]: With dead ends: 33306 [2021-05-22 02:11:35,471 INFO L226 Difference]: Without dead ends: 33306 [2021-05-22 02:11:35,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:11:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-05-22 02:11:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-05-22 02:11:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-05-22 02:11:36,070 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-05-22 02:11:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:36,071 INFO L482 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-05-22 02:11:36,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-05-22 02:11:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:36,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:36,225 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:36,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-22 02:11:36,428 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-05-22 02:11:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:36,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071289800] [2021-05-22 02:11:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:36,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:36,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071289800] [2021-05-22 02:11:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071289800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:36,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272426227] [2021-05-22 02:11:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:36,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:36,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272426227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:36,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:36,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:36,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046114330] [2021-05-22 02:11:36,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:36,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:36,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:36,643 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:38,029 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-05-22 02:11:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:11:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:38,200 INFO L225 Difference]: With dead ends: 33343 [2021-05-22 02:11:38,200 INFO L226 Difference]: Without dead ends: 33343 [2021-05-22 02:11:38,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:11:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-05-22 02:11:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-05-22 02:11:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-05-22 02:11:38,718 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-05-22 02:11:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:38,718 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-05-22 02:11:38,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-05-22 02:11:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:38,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:38,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:38,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-22 02:11:38,970 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-05-22 02:11:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:38,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977973930] [2021-05-22 02:11:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:39,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977973930] [2021-05-22 02:11:39,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977973930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:39,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292853350] [2021-05-22 02:11:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:39,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:39,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292853350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:39,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:39,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:39,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125865624] [2021-05-22 02:11:39,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:39,132 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:40,136 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-05-22 02:11:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:11:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:40,204 INFO L225 Difference]: With dead ends: 29062 [2021-05-22 02:11:40,204 INFO L226 Difference]: Without dead ends: 29027 [2021-05-22 02:11:40,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:11:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-05-22 02:11:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-05-22 02:11:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-05-22 02:11:40,804 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-05-22 02:11:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:40,804 INFO L482 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-05-22 02:11:40,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-05-22 02:11:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:40,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:40,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:41,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-22 02:11:41,052 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-05-22 02:11:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:41,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046708520] [2021-05-22 02:11:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:41,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046708520] [2021-05-22 02:11:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046708520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099934642] [2021-05-22 02:11:41,092 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:41,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:11:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099934642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:41,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:41,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:41,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655994847] [2021-05-22 02:11:41,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:41,220 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:42,582 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-05-22 02:11:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:11:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:42,646 INFO L225 Difference]: With dead ends: 29427 [2021-05-22 02:11:42,646 INFO L226 Difference]: Without dead ends: 29427 [2021-05-22 02:11:42,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:11:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-05-22 02:11:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-05-22 02:11:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-05-22 02:11:43,171 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-05-22 02:11:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:43,171 INFO L482 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-05-22 02:11:43,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-05-22 02:11:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:43,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:43,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:43,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:43,423 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:43,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:43,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-05-22 02:11:43,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:43,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340111295] [2021-05-22 02:11:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:43,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:43,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340111295] [2021-05-22 02:11:43,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340111295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:43,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969252579] [2021-05-22 02:11:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:43,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:43,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:11:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:43,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969252579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:43,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:43,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-22 02:11:43,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912744875] [2021-05-22 02:11:43,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:11:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:11:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:11:43,542 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:44,008 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-05-22 02:11:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:11:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:44,096 INFO L225 Difference]: With dead ends: 35828 [2021-05-22 02:11:44,096 INFO L226 Difference]: Without dead ends: 35821 [2021-05-22 02:11:44,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:11:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-05-22 02:11:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-05-22 02:11:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-05-22 02:11:44,866 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-05-22 02:11:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:44,867 INFO L482 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-05-22 02:11:44,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-05-22 02:11:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:44,912 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:44,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:45,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:45,125 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-05-22 02:11:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:45,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723878269] [2021-05-22 02:11:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723878269] [2021-05-22 02:11:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723878269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577077989] [2021-05-22 02:11:45,149 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:45,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:11:45,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:11:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:45,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577077989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:45,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:45,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:11:45,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902075869] [2021-05-22 02:11:45,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:11:45,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:11:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:45,246 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:45,794 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-05-22 02:11:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:11:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:45,923 INFO L225 Difference]: With dead ends: 44652 [2021-05-22 02:11:45,924 INFO L226 Difference]: Without dead ends: 44652 [2021-05-22 02:11:45,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:11:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-05-22 02:11:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-05-22 02:11:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-05-22 02:11:47,109 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-05-22 02:11:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:47,109 INFO L482 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-05-22 02:11:47,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-05-22 02:11:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:47,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:47,373 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:47,584 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-05-22 02:11:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786392438] [2021-05-22 02:11:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:47,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:47,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786392438] [2021-05-22 02:11:47,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786392438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:47,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340251100] [2021-05-22 02:11:47,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:48,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340251100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:48,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:48,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:48,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144430417] [2021-05-22 02:11:48,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:48,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:48,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:48,036 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:48,995 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-05-22 02:11:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:11:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:49,097 INFO L225 Difference]: With dead ends: 33629 [2021-05-22 02:11:49,097 INFO L226 Difference]: Without dead ends: 33615 [2021-05-22 02:11:49,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 594.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:11:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-05-22 02:11:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-05-22 02:11:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-05-22 02:11:49,938 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-05-22 02:11:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-05-22 02:11:49,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-05-22 02:11:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:50,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:50,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:50,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:50,218 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-05-22 02:11:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:50,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114365196] [2021-05-22 02:11:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114365196] [2021-05-22 02:11:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114365196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008712252] [2021-05-22 02:11:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:50,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:11:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:11:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008712252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:11:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018453260] [2021-05-22 02:11:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:11:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:11:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:11:50,431 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:51,364 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-05-22 02:11:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:11:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:51,457 INFO L225 Difference]: With dead ends: 33760 [2021-05-22 02:11:51,458 INFO L226 Difference]: Without dead ends: 33754 [2021-05-22 02:11:51,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:11:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-05-22 02:11:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-05-22 02:11:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-05-22 02:11:52,427 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-05-22 02:11:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:52,427 INFO L482 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-05-22 02:11:52,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-05-22 02:11:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:52,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:52,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:52,709 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-05-22 02:11:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:52,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798480886] [2021-05-22 02:11:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:52,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:52,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798480886] [2021-05-22 02:11:52,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798480886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:52,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922858121] [2021-05-22 02:11:52,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:52,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:11:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:11:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:52,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922858121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:52,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:52,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-22 02:11:52,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776555247] [2021-05-22 02:11:52,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:11:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:11:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:11:52,878 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:53,242 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-05-22 02:11:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:11:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:53,616 INFO L225 Difference]: With dead ends: 41266 [2021-05-22 02:11:53,616 INFO L226 Difference]: Without dead ends: 41260 [2021-05-22 02:11:53,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:11:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-05-22 02:11:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-05-22 02:11:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-05-22 02:11:54,661 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-05-22 02:11:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:54,661 INFO L482 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-05-22 02:11:54,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-05-22 02:11:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:54,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:54,726 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:54,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-22 02:11:54,926 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-05-22 02:11:54,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:54,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282102503] [2021-05-22 02:11:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:54,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:54,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282102503] [2021-05-22 02:11:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282102503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:54,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176716838] [2021-05-22 02:11:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:54,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:11:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:11:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:11:55,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176716838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:55,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:55,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-22 02:11:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979993474] [2021-05-22 02:11:55,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:11:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:11:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:11:55,044 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:55,378 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-05-22 02:11:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:11:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:55,495 INFO L225 Difference]: With dead ends: 41324 [2021-05-22 02:11:55,495 INFO L226 Difference]: Without dead ends: 41306 [2021-05-22 02:11:55,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:11:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-05-22 02:11:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-05-22 02:11:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-05-22 02:11:56,448 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-05-22 02:11:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:56,448 INFO L482 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-05-22 02:11:56,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-05-22 02:11:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:56,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:56,512 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:56,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-22 02:11:56,728 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-05-22 02:11:56,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:56,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110470300] [2021-05-22 02:11:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:56,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:56,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110470300] [2021-05-22 02:11:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110470300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541398854] [2021-05-22 02:11:56,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:56,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:11:56,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:11:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:11:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:56,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541398854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:56,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:56,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-22 02:11:56,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175420988] [2021-05-22 02:11:56,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:11:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:11:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:11:56,887 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:11:57,540 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-05-22 02:11:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:11:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:11:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:11:57,663 INFO L225 Difference]: With dead ends: 41161 [2021-05-22 02:11:57,663 INFO L226 Difference]: Without dead ends: 41131 [2021-05-22 02:11:57,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:11:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-05-22 02:11:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-05-22 02:11:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-05-22 02:11:58,717 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-05-22 02:11:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:11:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-05-22 02:11:58,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:11:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-05-22 02:11:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:11:58,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:11:58,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:11:58,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-22 02:11:58,981 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:11:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:11:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-05-22 02:11:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:11:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802075770] [2021-05-22 02:11:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:11:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:11:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802075770] [2021-05-22 02:11:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802075770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376697572] [2021-05-22 02:11:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:11:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:11:59,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:11:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:11:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:11:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376697572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:11:59,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:11:59,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:11:59,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897100441] [2021-05-22 02:11:59,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:11:59,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:11:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:11:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:11:59,156 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:01,047 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-05-22 02:12:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:12:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:01,228 INFO L225 Difference]: With dead ends: 66239 [2021-05-22 02:12:01,229 INFO L226 Difference]: Without dead ends: 66187 [2021-05-22 02:12:01,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1059.0ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:12:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-05-22 02:12:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-05-22 02:12:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-05-22 02:12:02,443 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-05-22 02:12:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:02,443 INFO L482 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-05-22 02:12:02,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-05-22 02:12:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:02,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:02,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:02,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-22 02:12:02,965 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-05-22 02:12:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89160808] [2021-05-22 02:12:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:02,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:02,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89160808] [2021-05-22 02:12:02,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89160808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:02,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052627149] [2021-05-22 02:12:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:03,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:03,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052627149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:03,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:03,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:03,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179187665] [2021-05-22 02:12:03,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:03,123 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:05,074 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-05-22 02:12:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-22 02:12:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:05,266 INFO L225 Difference]: With dead ends: 74432 [2021-05-22 02:12:05,266 INFO L226 Difference]: Without dead ends: 74390 [2021-05-22 02:12:05,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1017.8ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:12:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states. [2021-05-22 02:12:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74390 to 35919. [2021-05-22 02:12:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35919 states, 35918 states have (on average 3.9112422740687123) internal successors, (140484), 35918 states have internal predecessors, (140484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35919 states to 35919 states and 140484 transitions. [2021-05-22 02:12:06,459 INFO L78 Accepts]: Start accepts. Automaton has 35919 states and 140484 transitions. Word has length 25 [2021-05-22 02:12:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:06,459 INFO L482 AbstractCegarLoop]: Abstraction has 35919 states and 140484 transitions. [2021-05-22 02:12:06,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 35919 states and 140484 transitions. [2021-05-22 02:12:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:06,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:06,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:06,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:06,733 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 81 times [2021-05-22 02:12:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:06,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428358571] [2021-05-22 02:12:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:06,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:06,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428358571] [2021-05-22 02:12:06,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428358571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:06,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765186448] [2021-05-22 02:12:06,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:06,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:12:06,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765186448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:06,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:06,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:06,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827798446] [2021-05-22 02:12:06,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:06,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:06,911 INFO L87 Difference]: Start difference. First operand 35919 states and 140484 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:08,823 INFO L93 Difference]: Finished difference Result 61858 states and 228818 transitions. [2021-05-22 02:12:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:12:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:09,005 INFO L225 Difference]: With dead ends: 61858 [2021-05-22 02:12:09,006 INFO L226 Difference]: Without dead ends: 61830 [2021-05-22 02:12:09,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:12:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61830 states. [2021-05-22 02:12:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61830 to 38738. [2021-05-22 02:12:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38738 states, 38737 states have (on average 3.9098794434261817) internal successors, (151457), 38737 states have internal predecessors, (151457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38738 states to 38738 states and 151457 transitions. [2021-05-22 02:12:10,252 INFO L78 Accepts]: Start accepts. Automaton has 38738 states and 151457 transitions. Word has length 25 [2021-05-22 02:12:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:10,252 INFO L482 AbstractCegarLoop]: Abstraction has 38738 states and 151457 transitions. [2021-05-22 02:12:10,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 38738 states and 151457 transitions. [2021-05-22 02:12:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:10,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:10,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:10,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:10,526 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 82 times [2021-05-22 02:12:10,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:10,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090687715] [2021-05-22 02:12:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:10,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:10,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090687715] [2021-05-22 02:12:10,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090687715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:10,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73206744] [2021-05-22 02:12:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:10,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:12:10,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:10,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73206744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:10,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:10,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:10,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972120568] [2021-05-22 02:12:10,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:10,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:10,678 INFO L87 Difference]: Start difference. First operand 38738 states and 151457 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:11,487 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-22 02:12:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:12,741 INFO L93 Difference]: Finished difference Result 77268 states and 287634 transitions. [2021-05-22 02:12:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:12:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:12,988 INFO L225 Difference]: With dead ends: 77268 [2021-05-22 02:12:12,988 INFO L226 Difference]: Without dead ends: 77240 [2021-05-22 02:12:12,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1262.4ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:12:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77240 states. [2021-05-22 02:12:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77240 to 45925. [2021-05-22 02:12:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45925 states, 45924 states have (on average 3.9262477136137965) internal successors, (180309), 45924 states have internal predecessors, (180309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45925 states to 45925 states and 180309 transitions. [2021-05-22 02:12:14,891 INFO L78 Accepts]: Start accepts. Automaton has 45925 states and 180309 transitions. Word has length 25 [2021-05-22 02:12:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:14,892 INFO L482 AbstractCegarLoop]: Abstraction has 45925 states and 180309 transitions. [2021-05-22 02:12:14,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 45925 states and 180309 transitions. [2021-05-22 02:12:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:14,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:14,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:15,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-22 02:12:15,194 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 83 times [2021-05-22 02:12:15,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:15,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350713776] [2021-05-22 02:12:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:15,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:15,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350713776] [2021-05-22 02:12:15,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350713776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:15,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264856333] [2021-05-22 02:12:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:15,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:12:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:15,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264856333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:15,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:15,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:15,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463367278] [2021-05-22 02:12:15,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:15,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:15,340 INFO L87 Difference]: Start difference. First operand 45925 states and 180309 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:17,015 INFO L93 Difference]: Finished difference Result 66048 states and 249082 transitions. [2021-05-22 02:12:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:12:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:17,221 INFO L225 Difference]: With dead ends: 66048 [2021-05-22 02:12:17,221 INFO L226 Difference]: Without dead ends: 65996 [2021-05-22 02:12:17,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:12:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65996 states. [2021-05-22 02:12:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65996 to 40933. [2021-05-22 02:12:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 3.9125378676829863) internal successors, (160148), 40932 states have internal predecessors, (160148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 160148 transitions. [2021-05-22 02:12:18,662 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 160148 transitions. Word has length 25 [2021-05-22 02:12:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:18,663 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 160148 transitions. [2021-05-22 02:12:18,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 160148 transitions. [2021-05-22 02:12:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:18,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:18,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:18,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:18,968 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 84 times [2021-05-22 02:12:18,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:18,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872869928] [2021-05-22 02:12:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:19,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:19,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872869928] [2021-05-22 02:12:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872869928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256429271] [2021-05-22 02:12:19,004 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:19,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:12:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:19,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256429271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:19,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:19,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:19,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134277410] [2021-05-22 02:12:19,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:19,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:19,133 INFO L87 Difference]: Start difference. First operand 40933 states and 160148 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:20,728 INFO L93 Difference]: Finished difference Result 67539 states and 253876 transitions. [2021-05-22 02:12:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:12:20,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:20,917 INFO L225 Difference]: With dead ends: 67539 [2021-05-22 02:12:20,917 INFO L226 Difference]: Without dead ends: 67515 [2021-05-22 02:12:20,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 861.8ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:12:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-05-22 02:12:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42889. [2021-05-22 02:12:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42888 states have (on average 3.9317524715538146) internal successors, (168625), 42888 states have internal predecessors, (168625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 168625 transitions. [2021-05-22 02:12:22,267 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 168625 transitions. Word has length 25 [2021-05-22 02:12:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:22,267 INFO L482 AbstractCegarLoop]: Abstraction has 42889 states and 168625 transitions. [2021-05-22 02:12:22,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 168625 transitions. [2021-05-22 02:12:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:22,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:22,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:22,557 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 85 times [2021-05-22 02:12:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705247434] [2021-05-22 02:12:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:22,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:22,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705247434] [2021-05-22 02:12:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705247434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:22,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212220917] [2021-05-22 02:12:22,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:22,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212220917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:22,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:22,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148529078] [2021-05-22 02:12:22,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:22,709 INFO L87 Difference]: Start difference. First operand 42889 states and 168625 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:24,160 INFO L93 Difference]: Finished difference Result 73498 states and 274895 transitions. [2021-05-22 02:12:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:12:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:24,384 INFO L225 Difference]: With dead ends: 73498 [2021-05-22 02:12:24,384 INFO L226 Difference]: Without dead ends: 73498 [2021-05-22 02:12:24,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:12:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73498 states. [2021-05-22 02:12:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73498 to 42843. [2021-05-22 02:12:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42843 states, 42842 states have (on average 3.928574763082956) internal successors, (168308), 42842 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42843 states to 42843 states and 168308 transitions. [2021-05-22 02:12:25,962 INFO L78 Accepts]: Start accepts. Automaton has 42843 states and 168308 transitions. Word has length 25 [2021-05-22 02:12:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:25,962 INFO L482 AbstractCegarLoop]: Abstraction has 42843 states and 168308 transitions. [2021-05-22 02:12:25,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 42843 states and 168308 transitions. [2021-05-22 02:12:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:26,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:26,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:26,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:26,263 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 54 times [2021-05-22 02:12:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:26,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006800802] [2021-05-22 02:12:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006800802] [2021-05-22 02:12:26,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006800802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:26,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217737833] [2021-05-22 02:12:26,309 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:26,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:12:26,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:12:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:26,603 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-22 02:12:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:26,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217737833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:26,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:26,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:12:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953068432] [2021-05-22 02:12:26,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:12:26,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:12:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:12:26,699 INFO L87 Difference]: Start difference. First operand 42843 states and 168308 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:27,593 INFO L93 Difference]: Finished difference Result 48257 states and 184838 transitions. [2021-05-22 02:12:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:12:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:27,728 INFO L225 Difference]: With dead ends: 48257 [2021-05-22 02:12:27,729 INFO L226 Difference]: Without dead ends: 48257 [2021-05-22 02:12:27,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:12:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48257 states. [2021-05-22 02:12:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48257 to 42793. [2021-05-22 02:12:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42793 states, 42792 states have (on average 3.928608151056272) internal successors, (168113), 42792 states have internal predecessors, (168113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42793 states to 42793 states and 168113 transitions. [2021-05-22 02:12:28,949 INFO L78 Accepts]: Start accepts. Automaton has 42793 states and 168113 transitions. Word has length 25 [2021-05-22 02:12:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:28,949 INFO L482 AbstractCegarLoop]: Abstraction has 42793 states and 168113 transitions. [2021-05-22 02:12:28,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 42793 states and 168113 transitions. [2021-05-22 02:12:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:29,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:29,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:29,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-05-22 02:12:29,245 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 55 times [2021-05-22 02:12:29,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:29,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665546703] [2021-05-22 02:12:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:29,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665546703] [2021-05-22 02:12:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665546703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:29,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715840941] [2021-05-22 02:12:29,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:29,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:12:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715840941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:29,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:12:29,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207695214] [2021-05-22 02:12:29,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:12:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:12:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:12:29,428 INFO L87 Difference]: Start difference. First operand 42793 states and 168113 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:30,458 INFO L93 Difference]: Finished difference Result 44296 states and 172371 transitions. [2021-05-22 02:12:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:12:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:30,584 INFO L225 Difference]: With dead ends: 44296 [2021-05-22 02:12:30,584 INFO L226 Difference]: Without dead ends: 44282 [2021-05-22 02:12:30,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:12:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-05-22 02:12:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 43170. [2021-05-22 02:12:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 43169 states have (on average 3.922814982973893) internal successors, (169344), 43169 states have internal predecessors, (169344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 169344 transitions. [2021-05-22 02:12:31,928 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 169344 transitions. Word has length 25 [2021-05-22 02:12:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:31,929 INFO L482 AbstractCegarLoop]: Abstraction has 43170 states and 169344 transitions. [2021-05-22 02:12:31,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 169344 transitions. [2021-05-22 02:12:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:32,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:32,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:32,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-22 02:12:32,252 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 56 times [2021-05-22 02:12:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:32,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234657993] [2021-05-22 02:12:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:32,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:32,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234657993] [2021-05-22 02:12:32,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234657993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:32,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678712435] [2021-05-22 02:12:32,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:32,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:32,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:12:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:32,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678712435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:32,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:32,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:12:32,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447436495] [2021-05-22 02:12:32,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:12:32,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:12:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:12:32,442 INFO L87 Difference]: Start difference. First operand 43170 states and 169344 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:33,401 INFO L93 Difference]: Finished difference Result 44660 states and 173461 transitions. [2021-05-22 02:12:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:12:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:33,534 INFO L225 Difference]: With dead ends: 44660 [2021-05-22 02:12:33,534 INFO L226 Difference]: Without dead ends: 44654 [2021-05-22 02:12:33,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:12:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44654 states. [2021-05-22 02:12:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44654 to 42990. [2021-05-22 02:12:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.9254925678661983) internal successors, (168753), 42989 states have internal predecessors, (168753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168753 transitions. [2021-05-22 02:12:34,702 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168753 transitions. Word has length 25 [2021-05-22 02:12:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:34,703 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168753 transitions. [2021-05-22 02:12:34,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168753 transitions. [2021-05-22 02:12:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:34,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:34,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:35,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-22 02:12:35,000 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:35,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 86 times [2021-05-22 02:12:35,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:35,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913672520] [2021-05-22 02:12:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:35,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913672520] [2021-05-22 02:12:35,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913672520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594391056] [2021-05-22 02:12:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:12:35,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:35,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594391056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:35,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:35,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:35,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290989280] [2021-05-22 02:12:35,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:35,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:35,175 INFO L87 Difference]: Start difference. First operand 42990 states and 168753 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:35,877 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-22 02:12:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:36,916 INFO L93 Difference]: Finished difference Result 60797 states and 230049 transitions. [2021-05-22 02:12:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:12:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:37,111 INFO L225 Difference]: With dead ends: 60797 [2021-05-22 02:12:37,112 INFO L226 Difference]: Without dead ends: 60773 [2021-05-22 02:12:37,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1104.8ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:12:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60773 states. [2021-05-22 02:12:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60773 to 43024. [2021-05-22 02:12:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 3.925342258791809) internal successors, (168880), 43023 states have internal predecessors, (168880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 168880 transitions. [2021-05-22 02:12:38,479 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 168880 transitions. Word has length 25 [2021-05-22 02:12:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:38,480 INFO L482 AbstractCegarLoop]: Abstraction has 43024 states and 168880 transitions. [2021-05-22 02:12:38,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 168880 transitions. [2021-05-22 02:12:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:38,564 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:38,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:38,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-22 02:12:38,765 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 87 times [2021-05-22 02:12:38,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:38,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062651664] [2021-05-22 02:12:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:38,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062651664] [2021-05-22 02:12:38,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062651664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716529262] [2021-05-22 02:12:38,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:38,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:12:38,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:38,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716529262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:38,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:38,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:38,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601686703] [2021-05-22 02:12:38,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:38,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:38,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:38,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:38,917 INFO L87 Difference]: Start difference. First operand 43024 states and 168880 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:39,253 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-05-22 02:12:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:40,316 INFO L93 Difference]: Finished difference Result 59275 states and 225591 transitions. [2021-05-22 02:12:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:12:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:40,484 INFO L225 Difference]: With dead ends: 59275 [2021-05-22 02:12:40,484 INFO L226 Difference]: Without dead ends: 59251 [2021-05-22 02:12:40,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 868.6ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:12:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59251 states. [2021-05-22 02:12:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59251 to 42990. [2021-05-22 02:12:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.925469306101561) internal successors, (168752), 42989 states have internal predecessors, (168752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168752 transitions. [2021-05-22 02:12:41,702 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168752 transitions. Word has length 25 [2021-05-22 02:12:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:41,703 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168752 transitions. [2021-05-22 02:12:41,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168752 transitions. [2021-05-22 02:12:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:41,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:41,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:41,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-22 02:12:41,999 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 88 times [2021-05-22 02:12:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:41,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224285574] [2021-05-22 02:12:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224285574] [2021-05-22 02:12:42,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224285574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891324325] [2021-05-22 02:12:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:42,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:12:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:42,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891324325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:42,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:42,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:42,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573706702] [2021-05-22 02:12:42,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:42,651 INFO L87 Difference]: Start difference. First operand 42990 states and 168752 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:44,096 INFO L93 Difference]: Finished difference Result 75858 states and 282972 transitions. [2021-05-22 02:12:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:12:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:44,333 INFO L225 Difference]: With dead ends: 75858 [2021-05-22 02:12:44,333 INFO L226 Difference]: Without dead ends: 75858 [2021-05-22 02:12:44,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:12:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75858 states. [2021-05-22 02:12:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75858 to 43007. [2021-05-22 02:12:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43007 states, 43006 states have (on average 3.9260103241408175) internal successors, (168842), 43006 states have internal predecessors, (168842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43007 states to 43007 states and 168842 transitions. [2021-05-22 02:12:45,815 INFO L78 Accepts]: Start accepts. Automaton has 43007 states and 168842 transitions. Word has length 25 [2021-05-22 02:12:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:45,815 INFO L482 AbstractCegarLoop]: Abstraction has 43007 states and 168842 transitions. [2021-05-22 02:12:45,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 43007 states and 168842 transitions. [2021-05-22 02:12:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:45,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:45,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:46,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-22 02:12:46,099 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 89 times [2021-05-22 02:12:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:46,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434015479] [2021-05-22 02:12:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:46,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434015479] [2021-05-22 02:12:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434015479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528766171] [2021-05-22 02:12:46,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:46,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:12:46,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:46,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528766171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:46,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:46,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499695317] [2021-05-22 02:12:46,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:46,259 INFO L87 Difference]: Start difference. First operand 43007 states and 168842 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:46,703 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-05-22 02:12:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:47,811 INFO L93 Difference]: Finished difference Result 70213 states and 263905 transitions. [2021-05-22 02:12:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:12:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:48,019 INFO L225 Difference]: With dead ends: 70213 [2021-05-22 02:12:48,019 INFO L226 Difference]: Without dead ends: 70191 [2021-05-22 02:12:48,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:12:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70191 states. [2021-05-22 02:12:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70191 to 42956. [2021-05-22 02:12:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42956 states, 42955 states have (on average 3.924967989756722) internal successors, (168597), 42955 states have internal predecessors, (168597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42956 states to 42956 states and 168597 transitions. [2021-05-22 02:12:49,454 INFO L78 Accepts]: Start accepts. Automaton has 42956 states and 168597 transitions. Word has length 25 [2021-05-22 02:12:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:49,454 INFO L482 AbstractCegarLoop]: Abstraction has 42956 states and 168597 transitions. [2021-05-22 02:12:49,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42956 states and 168597 transitions. [2021-05-22 02:12:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:49,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:49,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:49,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:49,757 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 90 times [2021-05-22 02:12:49,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:49,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675911286] [2021-05-22 02:12:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:49,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:49,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675911286] [2021-05-22 02:12:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675911286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:49,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650449189] [2021-05-22 02:12:49,795 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:49,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:12:49,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650449189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:49,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:49,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:49,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546870599] [2021-05-22 02:12:49,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:49,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:49,919 INFO L87 Difference]: Start difference. First operand 42956 states and 168597 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:51,100 INFO L93 Difference]: Finished difference Result 56698 states and 216274 transitions. [2021-05-22 02:12:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:12:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:51,279 INFO L225 Difference]: With dead ends: 56698 [2021-05-22 02:12:51,279 INFO L226 Difference]: Without dead ends: 56674 [2021-05-22 02:12:51,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:12:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56674 states. [2021-05-22 02:12:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56674 to 42976. [2021-05-22 02:12:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 3.9249098312972657) internal successors, (168673), 42975 states have internal predecessors, (168673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 168673 transitions. [2021-05-22 02:12:52,565 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 168673 transitions. Word has length 25 [2021-05-22 02:12:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:52,565 INFO L482 AbstractCegarLoop]: Abstraction has 42976 states and 168673 transitions. [2021-05-22 02:12:52,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 168673 transitions. [2021-05-22 02:12:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:52,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:52,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:52,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:52,857 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 91 times [2021-05-22 02:12:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:52,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982961306] [2021-05-22 02:12:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:52,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:52,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982961306] [2021-05-22 02:12:52,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982961306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:52,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123828165] [2021-05-22 02:12:52,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:52,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123828165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:53,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:53,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368626490] [2021-05-22 02:12:53,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:53,023 INFO L87 Difference]: Start difference. First operand 42976 states and 168673 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:54,072 INFO L93 Difference]: Finished difference Result 55282 states and 212006 transitions. [2021-05-22 02:12:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:12:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:54,245 INFO L225 Difference]: With dead ends: 55282 [2021-05-22 02:12:54,246 INFO L226 Difference]: Without dead ends: 55258 [2021-05-22 02:12:54,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:12:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55258 states. [2021-05-22 02:12:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55258 to 42948. [2021-05-22 02:12:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42948 states, 42947 states have (on average 3.9250937201667173) internal successors, (168571), 42947 states have internal predecessors, (168571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42948 states to 42948 states and 168571 transitions. [2021-05-22 02:12:55,585 INFO L78 Accepts]: Start accepts. Automaton has 42948 states and 168571 transitions. Word has length 25 [2021-05-22 02:12:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:55,585 INFO L482 AbstractCegarLoop]: Abstraction has 42948 states and 168571 transitions. [2021-05-22 02:12:55,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42948 states and 168571 transitions. [2021-05-22 02:12:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:55,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:55,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:55,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:55,866 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 92 times [2021-05-22 02:12:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:55,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50630618] [2021-05-22 02:12:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:55,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:55,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50630618] [2021-05-22 02:12:55,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50630618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:55,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094938673] [2021-05-22 02:12:55,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:55,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:12:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094938673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:56,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:56,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599860123] [2021-05-22 02:12:56,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:56,028 INFO L87 Difference]: Start difference. First operand 42948 states and 168571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:12:56,720 INFO L93 Difference]: Finished difference Result 55613 states and 213184 transitions. [2021-05-22 02:12:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:12:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:12:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:12:56,893 INFO L225 Difference]: With dead ends: 55613 [2021-05-22 02:12:56,893 INFO L226 Difference]: Without dead ends: 55585 [2021-05-22 02:12:56,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:12:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-05-22 02:12:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 42946. [2021-05-22 02:12:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 3.9251833740831295) internal successors, (168567), 42945 states have internal predecessors, (168567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 168567 transitions. [2021-05-22 02:12:58,087 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 168567 transitions. Word has length 25 [2021-05-22 02:12:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:12:58,087 INFO L482 AbstractCegarLoop]: Abstraction has 42946 states and 168567 transitions. [2021-05-22 02:12:58,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 168567 transitions. [2021-05-22 02:12:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:12:58,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:12:58,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:12:58,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:58,366 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:12:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:12:58,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 93 times [2021-05-22 02:12:58,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:12:58,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154634787] [2021-05-22 02:12:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:12:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:12:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:58,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:12:58,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154634787] [2021-05-22 02:12:58,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154634787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:58,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203093293] [2021-05-22 02:12:58,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:12:58,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:12:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:12:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:12:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:12:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:12:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203093293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:12:58,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:12:58,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:12:58,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304540342] [2021-05-22 02:12:58,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:12:58,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:12:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:12:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:12:58,535 INFO L87 Difference]: Start difference. First operand 42946 states and 168567 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:12:59,107 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-05-22 02:13:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:00,139 INFO L93 Difference]: Finished difference Result 74999 states and 282718 transitions. [2021-05-22 02:13:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:13:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:00,378 INFO L225 Difference]: With dead ends: 74999 [2021-05-22 02:13:00,378 INFO L226 Difference]: Without dead ends: 74999 [2021-05-22 02:13:00,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1023.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:13:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74999 states. [2021-05-22 02:13:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74999 to 42943. [2021-05-22 02:13:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42943 states, 42942 states have (on average 3.9248521261236085) internal successors, (168541), 42942 states have internal predecessors, (168541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42943 states to 42943 states and 168541 transitions. [2021-05-22 02:13:01,939 INFO L78 Accepts]: Start accepts. Automaton has 42943 states and 168541 transitions. Word has length 25 [2021-05-22 02:13:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:01,939 INFO L482 AbstractCegarLoop]: Abstraction has 42943 states and 168541 transitions. [2021-05-22 02:13:01,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42943 states and 168541 transitions. [2021-05-22 02:13:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:02,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:02,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:02,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:02,242 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 94 times [2021-05-22 02:13:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:02,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196828767] [2021-05-22 02:13:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196828767] [2021-05-22 02:13:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196828767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458919262] [2021-05-22 02:13:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:02,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:13:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:02,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:02,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458919262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:02,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:02,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:13:02,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782299525] [2021-05-22 02:13:02,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:13:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:13:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:13:02,415 INFO L87 Difference]: Start difference. First operand 42943 states and 168541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:02,843 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-22 02:13:03,054 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-05-22 02:13:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:04,178 INFO L93 Difference]: Finished difference Result 72540 states and 274174 transitions. [2021-05-22 02:13:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:13:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:04,413 INFO L225 Difference]: With dead ends: 72540 [2021-05-22 02:13:04,413 INFO L226 Difference]: Without dead ends: 72522 [2021-05-22 02:13:04,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1219.9ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:13:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72522 states. [2021-05-22 02:13:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72522 to 42930. [2021-05-22 02:13:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42930 states, 42929 states have (on average 3.92459642665797) internal successors, (168479), 42929 states have internal predecessors, (168479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42930 states to 42930 states and 168479 transitions. [2021-05-22 02:13:05,867 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 168479 transitions. Word has length 25 [2021-05-22 02:13:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:05,867 INFO L482 AbstractCegarLoop]: Abstraction has 42930 states and 168479 transitions. [2021-05-22 02:13:05,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 168479 transitions. [2021-05-22 02:13:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:05,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:05,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:06,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:06,166 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 95 times [2021-05-22 02:13:06,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:06,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156616666] [2021-05-22 02:13:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:06,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:06,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156616666] [2021-05-22 02:13:06,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156616666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:06,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918480600] [2021-05-22 02:13:06,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:06,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:13:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918480600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:06,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:06,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:13:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581173493] [2021-05-22 02:13:06,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:13:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:13:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:13:06,342 INFO L87 Difference]: Start difference. First operand 42930 states and 168479 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:06,709 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 12 [2021-05-22 02:13:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:07,753 INFO L93 Difference]: Finished difference Result 59679 states and 226607 transitions. [2021-05-22 02:13:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:13:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:07,939 INFO L225 Difference]: With dead ends: 59679 [2021-05-22 02:13:07,939 INFO L226 Difference]: Without dead ends: 59653 [2021-05-22 02:13:07,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:13:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59653 states. [2021-05-22 02:13:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59653 to 42909. [2021-05-22 02:13:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 42908 states have (on average 3.9246993567633077) internal successors, (168401), 42908 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 168401 transitions. [2021-05-22 02:13:09,289 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 168401 transitions. Word has length 25 [2021-05-22 02:13:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:09,290 INFO L482 AbstractCegarLoop]: Abstraction has 42909 states and 168401 transitions. [2021-05-22 02:13:09,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 168401 transitions. [2021-05-22 02:13:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:09,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:09,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:09,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-22 02:13:09,586 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 96 times [2021-05-22 02:13:09,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:09,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352209891] [2021-05-22 02:13:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:09,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:09,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352209891] [2021-05-22 02:13:09,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352209891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:09,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910823217] [2021-05-22 02:13:09,620 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:09,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:13:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910823217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:09,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:09,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-22 02:13:09,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751687347] [2021-05-22 02:13:09,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:13:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:13:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:13:09,740 INFO L87 Difference]: Start difference. First operand 42909 states and 168401 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:10,763 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-22 02:13:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:11,504 INFO L93 Difference]: Finished difference Result 70768 states and 265935 transitions. [2021-05-22 02:13:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:13:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:11,733 INFO L225 Difference]: With dead ends: 70768 [2021-05-22 02:13:11,733 INFO L226 Difference]: Without dead ends: 70747 [2021-05-22 02:13:11,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1092.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:13:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2021-05-22 02:13:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 46142. [2021-05-22 02:13:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9316226349667325) internal successors, (181409), 46141 states have internal predecessors, (181409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181409 transitions. [2021-05-22 02:13:13,202 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181409 transitions. Word has length 25 [2021-05-22 02:13:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:13,202 INFO L482 AbstractCegarLoop]: Abstraction has 46142 states and 181409 transitions. [2021-05-22 02:13:13,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181409 transitions. [2021-05-22 02:13:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:13,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:13,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:13,511 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 97 times [2021-05-22 02:13:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:13,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750689659] [2021-05-22 02:13:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:13,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:13,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750689659] [2021-05-22 02:13:13,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750689659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:13,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228001444] [2021-05-22 02:13:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:13,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228001444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:13,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:13,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:13:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266626478] [2021-05-22 02:13:13,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:13,704 INFO L87 Difference]: Start difference. First operand 46142 states and 181409 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:14,561 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-22 02:13:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:15,531 INFO L93 Difference]: Finished difference Result 70061 states and 263721 transitions. [2021-05-22 02:13:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:13:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:15,753 INFO L225 Difference]: With dead ends: 70061 [2021-05-22 02:13:15,754 INFO L226 Difference]: Without dead ends: 70061 [2021-05-22 02:13:15,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1285.6ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:13:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70061 states. [2021-05-22 02:13:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70061 to 46133. [2021-05-22 02:13:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46132 states have (on average 3.931414202722622) internal successors, (181364), 46132 states have internal predecessors, (181364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 181364 transitions. [2021-05-22 02:13:17,235 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 181364 transitions. Word has length 25 [2021-05-22 02:13:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:17,235 INFO L482 AbstractCegarLoop]: Abstraction has 46133 states and 181364 transitions. [2021-05-22 02:13:17,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 181364 transitions. [2021-05-22 02:13:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:17,330 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:17,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:17,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-22 02:13:17,545 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 98 times [2021-05-22 02:13:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:17,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763220743] [2021-05-22 02:13:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:17,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:17,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763220743] [2021-05-22 02:13:17,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763220743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:17,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140795156] [2021-05-22 02:13:17,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:17,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:13:17,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:17,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140795156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:17,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:17,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:13:17,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217327028] [2021-05-22 02:13:17,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:17,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:17,712 INFO L87 Difference]: Start difference. First operand 46133 states and 181364 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:19,435 INFO L93 Difference]: Finished difference Result 66793 states and 252387 transitions. [2021-05-22 02:13:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:13:19,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:19,644 INFO L225 Difference]: With dead ends: 66793 [2021-05-22 02:13:19,644 INFO L226 Difference]: Without dead ends: 66779 [2021-05-22 02:13:19,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:13:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66779 states. [2021-05-22 02:13:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66779 to 46121. [2021-05-22 02:13:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46121 states, 46120 states have (on average 3.9313313096270597) internal successors, (181313), 46120 states have internal predecessors, (181313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46121 states to 46121 states and 181313 transitions. [2021-05-22 02:13:21,139 INFO L78 Accepts]: Start accepts. Automaton has 46121 states and 181313 transitions. Word has length 25 [2021-05-22 02:13:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:21,139 INFO L482 AbstractCegarLoop]: Abstraction has 46121 states and 181313 transitions. [2021-05-22 02:13:21,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46121 states and 181313 transitions. [2021-05-22 02:13:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:21,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:21,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:21,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:21,441 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 99 times [2021-05-22 02:13:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:21,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041695175] [2021-05-22 02:13:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:21,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:21,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041695175] [2021-05-22 02:13:21,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041695175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:21,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505838501] [2021-05-22 02:13:21,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:21,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:13:21,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:13:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:21,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505838501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:21,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:21,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-22 02:13:21,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429689559] [2021-05-22 02:13:21,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:21,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:21,606 INFO L87 Difference]: Start difference. First operand 46121 states and 181313 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:22,174 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-22 02:13:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:23,014 INFO L93 Difference]: Finished difference Result 61745 states and 236680 transitions. [2021-05-22 02:13:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:13:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:23,206 INFO L225 Difference]: With dead ends: 61745 [2021-05-22 02:13:23,206 INFO L226 Difference]: Without dead ends: 61721 [2021-05-22 02:13:23,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:13:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-05-22 02:13:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 46081. [2021-05-22 02:13:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46081 states, 46080 states have (on average 3.931640625) internal successors, (181170), 46080 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46081 states to 46081 states and 181170 transitions. [2021-05-22 02:13:24,622 INFO L78 Accepts]: Start accepts. Automaton has 46081 states and 181170 transitions. Word has length 25 [2021-05-22 02:13:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 46081 states and 181170 transitions. [2021-05-22 02:13:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 46081 states and 181170 transitions. [2021-05-22 02:13:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:24,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:24,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:24,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:24,930 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 57 times [2021-05-22 02:13:24,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:24,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520618352] [2021-05-22 02:13:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:24,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520618352] [2021-05-22 02:13:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520618352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800312588] [2021-05-22 02:13:24,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:25,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:13:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800312588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:25,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:25,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:13:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901698677] [2021-05-22 02:13:25,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:13:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:13:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:13:25,147 INFO L87 Difference]: Start difference. First operand 46081 states and 181170 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:26,197 INFO L93 Difference]: Finished difference Result 47008 states and 183685 transitions. [2021-05-22 02:13:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:13:26,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:26,333 INFO L225 Difference]: With dead ends: 47008 [2021-05-22 02:13:26,333 INFO L226 Difference]: Without dead ends: 47001 [2021-05-22 02:13:26,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:13:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47001 states. [2021-05-22 02:13:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47001 to 46162. [2021-05-22 02:13:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 3.9308507181386885) internal successors, (181452), 46161 states have internal predecessors, (181452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 181452 transitions. [2021-05-22 02:13:27,755 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 181452 transitions. Word has length 25 [2021-05-22 02:13:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:27,755 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 181452 transitions. [2021-05-22 02:13:27,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 181452 transitions. [2021-05-22 02:13:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:27,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:27,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:28,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-22 02:13:28,071 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:28,072 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 58 times [2021-05-22 02:13:28,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:28,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180772099] [2021-05-22 02:13:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:28,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:28,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180772099] [2021-05-22 02:13:28,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180772099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:28,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140564258] [2021-05-22 02:13:28,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:13:28,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:13:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:28,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140564258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:28,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:28,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:13:28,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770918316] [2021-05-22 02:13:28,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:13:28,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:13:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:13:28,253 INFO L87 Difference]: Start difference. First operand 46162 states and 181452 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:29,012 INFO L93 Difference]: Finished difference Result 47173 states and 184209 transitions. [2021-05-22 02:13:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:13:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:29,160 INFO L225 Difference]: With dead ends: 47173 [2021-05-22 02:13:29,160 INFO L226 Difference]: Without dead ends: 47173 [2021-05-22 02:13:29,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:13:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47173 states. [2021-05-22 02:13:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47173 to 46027. [2021-05-22 02:13:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46027 states, 46026 states have (on average 3.932733672272194) internal successors, (181008), 46026 states have internal predecessors, (181008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 181008 transitions. [2021-05-22 02:13:30,410 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 181008 transitions. Word has length 25 [2021-05-22 02:13:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:30,410 INFO L482 AbstractCegarLoop]: Abstraction has 46027 states and 181008 transitions. [2021-05-22 02:13:30,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 181008 transitions. [2021-05-22 02:13:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:30,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:30,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:30,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:30,717 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 16 times [2021-05-22 02:13:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:30,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733653782] [2021-05-22 02:13:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:30,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733653782] [2021-05-22 02:13:30,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733653782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292101122] [2021-05-22 02:13:30,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:30,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:13:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292101122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:30,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:30,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-22 02:13:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407708455] [2021-05-22 02:13:30,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:13:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:13:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:13:30,938 INFO L87 Difference]: Start difference. First operand 46027 states and 181008 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:32,018 INFO L93 Difference]: Finished difference Result 46443 states and 182086 transitions. [2021-05-22 02:13:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:13:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:32,165 INFO L225 Difference]: With dead ends: 46443 [2021-05-22 02:13:32,165 INFO L226 Difference]: Without dead ends: 46443 [2021-05-22 02:13:32,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:13:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46443 states. [2021-05-22 02:13:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46443 to 46095. [2021-05-22 02:13:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.9314878292185536) internal successors, (181218), 46094 states have internal predecessors, (181218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 181218 transitions. [2021-05-22 02:13:33,535 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 181218 transitions. Word has length 25 [2021-05-22 02:13:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:33,535 INFO L482 AbstractCegarLoop]: Abstraction has 46095 states and 181218 transitions. [2021-05-22 02:13:33,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 181218 transitions. [2021-05-22 02:13:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:33,631 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:33,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:33,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:33,831 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 17 times [2021-05-22 02:13:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:33,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763808498] [2021-05-22 02:13:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:33,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:33,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763808498] [2021-05-22 02:13:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763808498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38698385] [2021-05-22 02:13:33,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:33,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:13:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:13:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:33,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38698385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:33,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:33,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:13:33,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033536073] [2021-05-22 02:13:33,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:13:33,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:33,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:13:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:13:33,936 INFO L87 Difference]: Start difference. First operand 46095 states and 181218 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:34,435 INFO L93 Difference]: Finished difference Result 73392 states and 283504 transitions. [2021-05-22 02:13:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:13:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:34,654 INFO L225 Difference]: With dead ends: 73392 [2021-05-22 02:13:34,655 INFO L226 Difference]: Without dead ends: 73366 [2021-05-22 02:13:34,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:13:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73366 states. [2021-05-22 02:13:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73366 to 61230. [2021-05-22 02:13:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61230 states, 61229 states have (on average 3.9815446928742917) internal successors, (243786), 61229 states have internal predecessors, (243786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61230 states to 61230 states and 243786 transitions. [2021-05-22 02:13:36,703 INFO L78 Accepts]: Start accepts. Automaton has 61230 states and 243786 transitions. Word has length 25 [2021-05-22 02:13:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:36,703 INFO L482 AbstractCegarLoop]: Abstraction has 61230 states and 243786 transitions. [2021-05-22 02:13:36,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 61230 states and 243786 transitions. [2021-05-22 02:13:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:36,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:36,836 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:37,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:37,036 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:37,037 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 18 times [2021-05-22 02:13:37,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:37,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073624938] [2021-05-22 02:13:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:37,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073624938] [2021-05-22 02:13:37,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073624938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794686592] [2021-05-22 02:13:37,065 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:37,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:13:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794686592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:37,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:37,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:13:37,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423304461] [2021-05-22 02:13:37,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:37,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:37,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:37,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:37,217 INFO L87 Difference]: Start difference. First operand 61230 states and 243786 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:38,113 INFO L93 Difference]: Finished difference Result 62484 states and 247025 transitions. [2021-05-22 02:13:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:13:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:38,306 INFO L225 Difference]: With dead ends: 62484 [2021-05-22 02:13:38,306 INFO L226 Difference]: Without dead ends: 62484 [2021-05-22 02:13:38,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:13:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62484 states. [2021-05-22 02:13:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62484 to 61380. [2021-05-22 02:13:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61380 states, 61379 states have (on average 3.9795858518385767) internal successors, (244263), 61379 states have internal predecessors, (244263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61380 states to 61380 states and 244263 transitions. [2021-05-22 02:13:39,794 INFO L78 Accepts]: Start accepts. Automaton has 61380 states and 244263 transitions. Word has length 25 [2021-05-22 02:13:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:39,794 INFO L482 AbstractCegarLoop]: Abstraction has 61380 states and 244263 transitions. [2021-05-22 02:13:39,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states and 244263 transitions. [2021-05-22 02:13:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:40,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:40,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:40,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:40,373 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 19 times [2021-05-22 02:13:40,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:40,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612906733] [2021-05-22 02:13:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:40,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612906733] [2021-05-22 02:13:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612906733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719760586] [2021-05-22 02:13:40,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:13:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:13:40,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719760586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:40,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:40,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:13:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561690878] [2021-05-22 02:13:40,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:13:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:13:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:13:40,475 INFO L87 Difference]: Start difference. First operand 61380 states and 244263 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:41,038 INFO L93 Difference]: Finished difference Result 82749 states and 315087 transitions. [2021-05-22 02:13:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:13:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:41,276 INFO L225 Difference]: With dead ends: 82749 [2021-05-22 02:13:41,277 INFO L226 Difference]: Without dead ends: 82749 [2021-05-22 02:13:41,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:13:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82749 states. [2021-05-22 02:13:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82749 to 59640. [2021-05-22 02:13:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970220828652392) internal successors, (236780), 59639 states have internal predecessors, (236780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236780 transitions. [2021-05-22 02:13:43,565 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236780 transitions. Word has length 25 [2021-05-22 02:13:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:43,565 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236780 transitions. [2021-05-22 02:13:43,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236780 transitions. [2021-05-22 02:13:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:43,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:43,710 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:43,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:43,925 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 20 times [2021-05-22 02:13:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:43,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223923989] [2021-05-22 02:13:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:43,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223923989] [2021-05-22 02:13:43,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223923989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:43,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957274477] [2021-05-22 02:13:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:43,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:13:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:44,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957274477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:44,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:44,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:13:44,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834641089] [2021-05-22 02:13:44,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:44,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:44,094 INFO L87 Difference]: Start difference. First operand 59640 states and 236780 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:44,991 INFO L93 Difference]: Finished difference Result 60378 states and 238589 transitions. [2021-05-22 02:13:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:13:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:45,198 INFO L225 Difference]: With dead ends: 60378 [2021-05-22 02:13:45,198 INFO L226 Difference]: Without dead ends: 60371 [2021-05-22 02:13:45,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:13:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-05-22 02:13:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59640. [2021-05-22 02:13:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970187293549523) internal successors, (236778), 59639 states have internal predecessors, (236778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236778 transitions. [2021-05-22 02:13:46,912 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236778 transitions. Word has length 25 [2021-05-22 02:13:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:46,912 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236778 transitions. [2021-05-22 02:13:46,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236778 transitions. [2021-05-22 02:13:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:47,377 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:47,377 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:47,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:47,591 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 21 times [2021-05-22 02:13:47,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:47,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463052665] [2021-05-22 02:13:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:47,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463052665] [2021-05-22 02:13:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463052665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709352535] [2021-05-22 02:13:47,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:47,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:13:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709352535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:47,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:47,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:13:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541991104] [2021-05-22 02:13:47,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:47,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:47,760 INFO L87 Difference]: Start difference. First operand 59640 states and 236778 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:48,850 INFO L93 Difference]: Finished difference Result 61587 states and 241992 transitions. [2021-05-22 02:13:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:13:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:49,080 INFO L225 Difference]: With dead ends: 61587 [2021-05-22 02:13:49,080 INFO L226 Difference]: Without dead ends: 61587 [2021-05-22 02:13:49,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:13:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61587 states. [2021-05-22 02:13:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61587 to 59994. [2021-05-22 02:13:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59994 states, 59993 states have (on average 3.9657460037004317) internal successors, (237917), 59993 states have internal predecessors, (237917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59994 states to 59994 states and 237917 transitions. [2021-05-22 02:13:50,742 INFO L78 Accepts]: Start accepts. Automaton has 59994 states and 237917 transitions. Word has length 25 [2021-05-22 02:13:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:50,742 INFO L482 AbstractCegarLoop]: Abstraction has 59994 states and 237917 transitions. [2021-05-22 02:13:50,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 59994 states and 237917 transitions. [2021-05-22 02:13:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:50,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:50,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:51,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-22 02:13:51,091 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 22 times [2021-05-22 02:13:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:51,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308474228] [2021-05-22 02:13:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:51,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:51,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308474228] [2021-05-22 02:13:51,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308474228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:51,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159274625] [2021-05-22 02:13:51,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:51,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:13:51,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:13:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:13:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159274625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:51,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:51,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-22 02:13:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869263962] [2021-05-22 02:13:51,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:13:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:13:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:13:51,478 INFO L87 Difference]: Start difference. First operand 59994 states and 237917 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:52,026 INFO L93 Difference]: Finished difference Result 81683 states and 316037 transitions. [2021-05-22 02:13:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:13:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:52,292 INFO L225 Difference]: With dead ends: 81683 [2021-05-22 02:13:52,293 INFO L226 Difference]: Without dead ends: 81677 [2021-05-22 02:13:52,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:13:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81677 states. [2021-05-22 02:13:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81677 to 66665. [2021-05-22 02:13:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66665 states, 66664 states have (on average 3.9792541701668065) internal successors, (265273), 66664 states have internal predecessors, (265273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66665 states to 66665 states and 265273 transitions. [2021-05-22 02:13:54,715 INFO L78 Accepts]: Start accepts. Automaton has 66665 states and 265273 transitions. Word has length 25 [2021-05-22 02:13:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:54,715 INFO L482 AbstractCegarLoop]: Abstraction has 66665 states and 265273 transitions. [2021-05-22 02:13:54,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 66665 states and 265273 transitions. [2021-05-22 02:13:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:54,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:54,871 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:55,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-22 02:13:55,089 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 23 times [2021-05-22 02:13:55,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:55,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725286609] [2021-05-22 02:13:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:13:55,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725286609] [2021-05-22 02:13:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725286609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569214175] [2021-05-22 02:13:55,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:55,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:13:55,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:55,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:13:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:13:55,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569214175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:55,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:55,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-22 02:13:55,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976468676] [2021-05-22 02:13:55,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:13:55,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:13:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:13:55,606 INFO L87 Difference]: Start difference. First operand 66665 states and 265273 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:13:56,292 INFO L93 Difference]: Finished difference Result 88628 states and 338516 transitions. [2021-05-22 02:13:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:13:56,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:13:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:13:56,596 INFO L225 Difference]: With dead ends: 88628 [2021-05-22 02:13:56,597 INFO L226 Difference]: Without dead ends: 88621 [2021-05-22 02:13:56,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:13:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88621 states. [2021-05-22 02:13:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88621 to 65399. [2021-05-22 02:13:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65399 states, 65398 states have (on average 3.972644423376862) internal successors, (259803), 65398 states have internal predecessors, (259803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65399 states to 65399 states and 259803 transitions. [2021-05-22 02:13:59,010 INFO L78 Accepts]: Start accepts. Automaton has 65399 states and 259803 transitions. Word has length 25 [2021-05-22 02:13:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:13:59,010 INFO L482 AbstractCegarLoop]: Abstraction has 65399 states and 259803 transitions. [2021-05-22 02:13:59,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:13:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 65399 states and 259803 transitions. [2021-05-22 02:13:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:13:59,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:13:59,148 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:13:59,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-05-22 02:13:59,363 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:13:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:13:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1983645204, now seen corresponding path program 24 times [2021-05-22 02:13:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:13:59,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439626811] [2021-05-22 02:13:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:13:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:13:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:13:59,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:13:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439626811] [2021-05-22 02:13:59,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439626811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797145359] [2021-05-22 02:13:59,392 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:13:59,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:13:59,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:13:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:13:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:13:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:13:59,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797145359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:13:59,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:13:59,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-22 02:13:59,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491668446] [2021-05-22 02:13:59,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:13:59,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:13:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:13:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:13:59,538 INFO L87 Difference]: Start difference. First operand 65399 states and 259803 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:00,534 INFO L93 Difference]: Finished difference Result 66631 states and 262831 transitions. [2021-05-22 02:14:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:14:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:14:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:00,767 INFO L225 Difference]: With dead ends: 66631 [2021-05-22 02:14:00,767 INFO L226 Difference]: Without dead ends: 66610 [2021-05-22 02:14:00,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:14:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66610 states. [2021-05-22 02:14:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66610 to 65301. [2021-05-22 02:14:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65301 states, 65300 states have (on average 3.9736600306278715) internal successors, (259480), 65300 states have internal predecessors, (259480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65301 states to 65301 states and 259480 transitions. [2021-05-22 02:14:02,965 INFO L78 Accepts]: Start accepts. Automaton has 65301 states and 259480 transitions. Word has length 25 [2021-05-22 02:14:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:02,965 INFO L482 AbstractCegarLoop]: Abstraction has 65301 states and 259480 transitions. [2021-05-22 02:14:02,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 65301 states and 259480 transitions. [2021-05-22 02:14:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:14:03,098 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:03,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:14:03,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:03,317 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -403061012, now seen corresponding path program 25 times [2021-05-22 02:14:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:03,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541465790] [2021-05-22 02:14:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:03,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:03,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541465790] [2021-05-22 02:14:03,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541465790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:03,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342231265] [2021-05-22 02:14:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:14:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:14:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:14:03,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342231265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:03,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:14:03,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-22 02:14:03,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685788297] [2021-05-22 02:14:03,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:14:03,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:14:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:14:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:14:03,470 INFO L87 Difference]: Start difference. First operand 65301 states and 259480 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:14:04,136 INFO L93 Difference]: Finished difference Result 88604 states and 339078 transitions. [2021-05-22 02:14:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:14:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:14:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:14:04,421 INFO L225 Difference]: With dead ends: 88604 [2021-05-22 02:14:04,421 INFO L226 Difference]: Without dead ends: 88597 [2021-05-22 02:14:04,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:14:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88597 states. [2021-05-22 02:14:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88597 to 66336. [2021-05-22 02:14:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66336 states, 66335 states have (on average 3.9726690284163713) internal successors, (263527), 66335 states have internal predecessors, (263527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66336 states to 66336 states and 263527 transitions. [2021-05-22 02:14:07,123 INFO L78 Accepts]: Start accepts. Automaton has 66336 states and 263527 transitions. Word has length 25 [2021-05-22 02:14:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:14:07,123 INFO L482 AbstractCegarLoop]: Abstraction has 66336 states and 263527 transitions. [2021-05-22 02:14:07,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:14:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 66336 states and 263527 transitions. [2021-05-22 02:14:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:14:07,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:14:07,261 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forcibly destroying the process [2021-05-22 02:14:07,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:14:07,463 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:14:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:14:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 147370776, now seen corresponding path program 26 times [2021-05-22 02:14:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:14:07,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596854875] [2021-05-22 02:14:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:14:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:14:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:14:07,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:14:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596854875] [2021-05-22 02:14:07,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596854875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:14:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331057428] [2021-05-22 02:14:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)