/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:38:09,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:38:09,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:38:09,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:38:09,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:38:09,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:38:09,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:38:09,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:38:09,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:38:09,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:38:09,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:38:09,294 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:38:09,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:38:09,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:38:09,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:38:09,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:38:09,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:38:09,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:38:09,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:38:09,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:38:09,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:38:09,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:38:09,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:38:09,298 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:38:09,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:38:09,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:38:09,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:38:09,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:38:09,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:38:09,616 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:38:09,617 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:38:09,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-06-05 03:38:09,618 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-06-05 03:38:09,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:38:09,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:38:09,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:38:09,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:38:09,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:38:09,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:38:09,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:38:09,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:38:09,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:38:09,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/1) ... [2021-06-05 03:38:09,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:38:09,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:38:09,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:38:09,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:38:09,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (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 [2021-06-05 03:38:09,772 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-05 03:38:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-05 03:38:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-05 03:38:09,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-06-05 03:38:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-06-05 03:38:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-06-05 03:38:09,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-06-05 03:38:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-06-05 03:38:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-06-05 03:38:09,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-05 03:38:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-05 03:38:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-05 03:38:09,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:38:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:38:09,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:38:09,777 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:38:09,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:38:09,934 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:38:09,936 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:38:09 BoogieIcfgContainer [2021-06-05 03:38:09,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:38:09,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:38:09,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:38:09,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:38:09,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:38:09" (1/2) ... [2021-06-05 03:38:09,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac20321 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:38:09, skipping insertion in model container [2021-06-05 03:38:09,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:38:09" (2/2) ... [2021-06-05 03:38:09,944 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-06-05 03:38:09,951 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:38:09,952 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:38:09,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:38:09,953 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:38:10,031 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-05 03:38:10,050 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 03:38:10,067 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:38:10,067 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:38:10,067 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:38:10,067 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:38:10,067 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:38:10,067 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:38:10,067 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:38:10,068 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:38:10,076 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 138 flow [2021-06-05 03:38:10,149 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:10,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:10,183 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:10,184 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1503386291, now seen corresponding path program 1 times [2021-06-05 03:38:10,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:10,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070123377] [2021-06-05 03:38:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:10,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:10,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070123377] [2021-06-05 03:38:10,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070123377] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:10,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:10,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:38:10,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232211346] [2021-06-05 03:38:10,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:38:10,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:38:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,327 INFO L87 Difference]: Start difference. First operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 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 5.666666666666667) 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) [2021-06-05 03:38:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:10,355 INFO L93 Difference]: Finished difference Result 272 states and 771 transitions. [2021-06-05 03:38:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:38:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) 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 [2021-06-05 03:38:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:10,369 INFO L225 Difference]: With dead ends: 272 [2021-06-05 03:38:10,369 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 03:38:10,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 03:38:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-06-05 03:38:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.858736059479554) internal successors, (769), 269 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 769 transitions. [2021-06-05 03:38:10,433 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 769 transitions. Word has length 17 [2021-06-05 03:38:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:10,433 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 769 transitions. [2021-06-05 03:38:10,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) 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) [2021-06-05 03:38:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 769 transitions. [2021-06-05 03:38:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:10,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:10,448 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:10,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:38:10,448 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash 591735021, now seen corresponding path program 1 times [2021-06-05 03:38:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:10,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095919861] [2021-06-05 03:38:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:10,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:10,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095919861] [2021-06-05 03:38:10,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095919861] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:10,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:10,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:38:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153209263] [2021-06-05 03:38:10,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:38:10,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:38:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,504 INFO L87 Difference]: Start difference. First operand 270 states and 769 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) 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) [2021-06-05 03:38:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:10,514 INFO L93 Difference]: Finished difference Result 216 states and 589 transitions. [2021-06-05 03:38:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:38:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) 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 [2021-06-05 03:38:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:10,517 INFO L225 Difference]: With dead ends: 216 [2021-06-05 03:38:10,517 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 03:38:10,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 03:38:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-06-05 03:38:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.73953488372093) internal successors, (589), 215 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 589 transitions. [2021-06-05 03:38:10,538 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 589 transitions. Word has length 17 [2021-06-05 03:38:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:10,539 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 589 transitions. [2021-06-05 03:38:10,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) 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) [2021-06-05 03:38:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 589 transitions. [2021-06-05 03:38:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:10,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:10,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:10,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:38:10,541 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash -345548245, now seen corresponding path program 1 times [2021-06-05 03:38:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:10,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135422825] [2021-06-05 03:38:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:10,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:10,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135422825] [2021-06-05 03:38:10,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135422825] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:10,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:10,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:38:10,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184406112] [2021-06-05 03:38:10,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:38:10,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:38:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,565 INFO L87 Difference]: Start difference. First operand 216 states and 589 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) 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) [2021-06-05 03:38:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:10,573 INFO L93 Difference]: Finished difference Result 162 states and 433 transitions. [2021-06-05 03:38:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:38:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) 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 [2021-06-05 03:38:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:10,575 INFO L225 Difference]: With dead ends: 162 [2021-06-05 03:38:10,575 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 03:38:10,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:38:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 03:38:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-06-05 03:38:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.68944099378882) internal successors, (433), 161 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 433 transitions. [2021-06-05 03:38:10,594 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 433 transitions. Word has length 17 [2021-06-05 03:38:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:10,604 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 433 transitions. [2021-06-05 03:38:10,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) 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) [2021-06-05 03:38:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 433 transitions. [2021-06-05 03:38:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:10,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:10,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:10,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:38:10,606 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1896362483, now seen corresponding path program 1 times [2021-06-05 03:38:10,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:10,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083627106] [2021-06-05 03:38:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:10,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:10,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083627106] [2021-06-05 03:38:10,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083627106] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:10,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:10,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:10,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384814283] [2021-06-05 03:38:10,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:10,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:10,833 INFO L87 Difference]: Start difference. First operand 162 states and 433 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:10,878 INFO L93 Difference]: Finished difference Result 304 states and 750 transitions. [2021-06-05 03:38:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:10,881 INFO L225 Difference]: With dead ends: 304 [2021-06-05 03:38:10,881 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 03:38:10,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 03:38:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 170. [2021-06-05 03:38:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6804733727810652) internal successors, (453), 169 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2021-06-05 03:38:10,894 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 17 [2021-06-05 03:38:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:10,894 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2021-06-05 03:38:10,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2021-06-05 03:38:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:10,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:10,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:10,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:38:10,896 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash 448349167, now seen corresponding path program 2 times [2021-06-05 03:38:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:10,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889310609] [2021-06-05 03:38:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889310609] [2021-06-05 03:38:11,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889310609] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042051514] [2021-06-05 03:38:11,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,037 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,093 INFO L93 Difference]: Finished difference Result 319 states and 785 transitions. [2021-06-05 03:38:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,098 INFO L225 Difference]: With dead ends: 319 [2021-06-05 03:38:11,098 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 03:38:11,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 03:38:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2021-06-05 03:38:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.6645962732919255) internal successors, (429), 161 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 429 transitions. [2021-06-05 03:38:11,129 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 429 transitions. Word has length 17 [2021-06-05 03:38:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,130 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 429 transitions. [2021-06-05 03:38:11,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 429 transitions. [2021-06-05 03:38:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:38:11,131 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 808670063, now seen corresponding path program 3 times [2021-06-05 03:38:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397216855] [2021-06-05 03:38:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397216855] [2021-06-05 03:38:11,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397216855] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852412122] [2021-06-05 03:38:11,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,279 INFO L87 Difference]: Start difference. First operand 162 states and 429 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,337 INFO L93 Difference]: Finished difference Result 291 states and 712 transitions. [2021-06-05 03:38:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,340 INFO L225 Difference]: With dead ends: 291 [2021-06-05 03:38:11,341 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 03:38:11,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 03:38:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2021-06-05 03:38:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.6484848484848484) internal successors, (437), 165 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 437 transitions. [2021-06-05 03:38:11,363 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 437 transitions. Word has length 17 [2021-06-05 03:38:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,364 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 437 transitions. [2021-06-05 03:38:11,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 437 transitions. [2021-06-05 03:38:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:38:11,368 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -209274001, now seen corresponding path program 4 times [2021-06-05 03:38:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733642967] [2021-06-05 03:38:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733642967] [2021-06-05 03:38:11,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733642967] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645554352] [2021-06-05 03:38:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,453 INFO L87 Difference]: Start difference. First operand 166 states and 437 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,502 INFO L93 Difference]: Finished difference Result 297 states and 725 transitions. [2021-06-05 03:38:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,504 INFO L225 Difference]: With dead ends: 297 [2021-06-05 03:38:11,504 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 03:38:11,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 03:38:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2021-06-05 03:38:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.652173913043478) internal successors, (427), 161 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 427 transitions. [2021-06-05 03:38:11,510 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 427 transitions. Word has length 17 [2021-06-05 03:38:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,511 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 427 transitions. [2021-06-05 03:38:11,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 427 transitions. [2021-06-05 03:38:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:38:11,512 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1120579375, now seen corresponding path program 5 times [2021-06-05 03:38:11,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733157558] [2021-06-05 03:38:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733157558] [2021-06-05 03:38:11,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733157558] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454954675] [2021-06-05 03:38:11,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,646 INFO L87 Difference]: Start difference. First operand 162 states and 427 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,680 INFO L93 Difference]: Finished difference Result 332 states and 818 transitions. [2021-06-05 03:38:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,682 INFO L225 Difference]: With dead ends: 332 [2021-06-05 03:38:11,682 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 03:38:11,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 03:38:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2021-06-05 03:38:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.602272727272727) internal successors, (458), 176 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 458 transitions. [2021-06-05 03:38:11,689 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 458 transitions. Word has length 17 [2021-06-05 03:38:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,689 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 458 transitions. [2021-06-05 03:38:11,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 458 transitions. [2021-06-05 03:38:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,690 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:38:11,690 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1448962257, now seen corresponding path program 6 times [2021-06-05 03:38:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361940693] [2021-06-05 03:38:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361940693] [2021-06-05 03:38:11,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361940693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312326246] [2021-06-05 03:38:11,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,785 INFO L87 Difference]: Start difference. First operand 177 states and 458 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,826 INFO L93 Difference]: Finished difference Result 323 states and 785 transitions. [2021-06-05 03:38:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,828 INFO L225 Difference]: With dead ends: 323 [2021-06-05 03:38:11,828 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 03:38:11,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 03:38:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 156. [2021-06-05 03:38:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6516129032258067) internal successors, (411), 155 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 411 transitions. [2021-06-05 03:38:11,834 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 411 transitions. Word has length 17 [2021-06-05 03:38:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,834 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 411 transitions. [2021-06-05 03:38:11,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 411 transitions. [2021-06-05 03:38:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:38:11,835 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash -815299857, now seen corresponding path program 7 times [2021-06-05 03:38:11,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750289662] [2021-06-05 03:38:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750289662] [2021-06-05 03:38:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750289662] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:11,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141348912] [2021-06-05 03:38:11,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:11,900 INFO L87 Difference]: Start difference. First operand 156 states and 411 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:11,933 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2021-06-05 03:38:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:11,935 INFO L225 Difference]: With dead ends: 290 [2021-06-05 03:38:11,935 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 03:38:11,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 03:38:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 156. [2021-06-05 03:38:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6258064516129034) internal successors, (407), 155 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 407 transitions. [2021-06-05 03:38:11,941 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 407 transitions. Word has length 17 [2021-06-05 03:38:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:11,941 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 407 transitions. [2021-06-05 03:38:11,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 407 transitions. [2021-06-05 03:38:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:11,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:11,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:11,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:38:11,942 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1529411793, now seen corresponding path program 8 times [2021-06-05 03:38:11,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:11,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311935922] [2021-06-05 03:38:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311935922] [2021-06-05 03:38:12,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311935922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205399907] [2021-06-05 03:38:12,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,014 INFO L87 Difference]: Start difference. First operand 156 states and 407 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,048 INFO L93 Difference]: Finished difference Result 305 states and 739 transitions. [2021-06-05 03:38:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,050 INFO L225 Difference]: With dead ends: 305 [2021-06-05 03:38:12,050 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 03:38:12,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 03:38:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 148. [2021-06-05 03:38:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6054421768707483) internal successors, (383), 147 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2021-06-05 03:38:12,056 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 17 [2021-06-05 03:38:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,056 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2021-06-05 03:38:12,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2021-06-05 03:38:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 03:38:12,057 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash 192998127, now seen corresponding path program 9 times [2021-06-05 03:38:12,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523973386] [2021-06-05 03:38:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523973386] [2021-06-05 03:38:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523973386] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457397192] [2021-06-05 03:38:12,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,145 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,184 INFO L93 Difference]: Finished difference Result 267 states and 641 transitions. [2021-06-05 03:38:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,185 INFO L225 Difference]: With dead ends: 267 [2021-06-05 03:38:12,185 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 03:38:12,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 03:38:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2021-06-05 03:38:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.589403973509934) internal successors, (391), 151 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 391 transitions. [2021-06-05 03:38:12,192 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 391 transitions. Word has length 17 [2021-06-05 03:38:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,192 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 391 transitions. [2021-06-05 03:38:12,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 391 transitions. [2021-06-05 03:38:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 03:38:12,193 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1503575313, now seen corresponding path program 10 times [2021-06-05 03:38:12,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772517188] [2021-06-05 03:38:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772517188] [2021-06-05 03:38:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772517188] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7555334] [2021-06-05 03:38:12,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,269 INFO L87 Difference]: Start difference. First operand 152 states and 391 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,313 INFO L93 Difference]: Finished difference Result 239 states and 584 transitions. [2021-06-05 03:38:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,314 INFO L225 Difference]: With dead ends: 239 [2021-06-05 03:38:12,314 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 03:38:12,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 03:38:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2021-06-05 03:38:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5918367346938775) internal successors, (381), 147 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 381 transitions. [2021-06-05 03:38:12,321 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 381 transitions. Word has length 17 [2021-06-05 03:38:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,321 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 381 transitions. [2021-06-05 03:38:12,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 381 transitions. [2021-06-05 03:38:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,322 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 03:38:12,323 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1736251311, now seen corresponding path program 11 times [2021-06-05 03:38:12,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731849605] [2021-06-05 03:38:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731849605] [2021-06-05 03:38:12,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731849605] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286626536] [2021-06-05 03:38:12,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,403 INFO L87 Difference]: Start difference. First operand 148 states and 381 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,438 INFO L93 Difference]: Finished difference Result 288 states and 697 transitions. [2021-06-05 03:38:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,439 INFO L225 Difference]: With dead ends: 288 [2021-06-05 03:38:12,439 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 03:38:12,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 03:38:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 158. [2021-06-05 03:38:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5605095541401273) internal successors, (402), 157 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 402 transitions. [2021-06-05 03:38:12,445 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 402 transitions. Word has length 17 [2021-06-05 03:38:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,446 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 402 transitions. [2021-06-05 03:38:12,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 402 transitions. [2021-06-05 03:38:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 03:38:12,447 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1648314577, now seen corresponding path program 12 times [2021-06-05 03:38:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785338850] [2021-06-05 03:38:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785338850] [2021-06-05 03:38:12,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785338850] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161001188] [2021-06-05 03:38:12,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,509 INFO L87 Difference]: Start difference. First operand 158 states and 402 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,550 INFO L93 Difference]: Finished difference Result 245 states and 595 transitions. [2021-06-05 03:38:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,552 INFO L225 Difference]: With dead ends: 245 [2021-06-05 03:38:12,552 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 03:38:12,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 03:38:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-06-05 03:38:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5944055944055946) internal successors, (371), 143 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2021-06-05 03:38:12,557 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 17 [2021-06-05 03:38:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,558 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2021-06-05 03:38:12,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2021-06-05 03:38:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 03:38:12,559 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 601862097, now seen corresponding path program 13 times [2021-06-05 03:38:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320226981] [2021-06-05 03:38:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320226981] [2021-06-05 03:38:12,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320226981] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894482447] [2021-06-05 03:38:12,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,621 INFO L87 Difference]: Start difference. First operand 144 states and 371 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,654 INFO L93 Difference]: Finished difference Result 261 states and 622 transitions. [2021-06-05 03:38:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,656 INFO L225 Difference]: With dead ends: 261 [2021-06-05 03:38:12,656 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 03:38:12,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 03:38:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 144. [2021-06-05 03:38:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5664335664335662) internal successors, (367), 143 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 367 transitions. [2021-06-05 03:38:12,662 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 367 transitions. Word has length 17 [2021-06-05 03:38:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,662 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 367 transitions. [2021-06-05 03:38:12,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 367 transitions. [2021-06-05 03:38:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,670 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 03:38:12,670 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash -416081967, now seen corresponding path program 14 times [2021-06-05 03:38:12,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520128695] [2021-06-05 03:38:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520128695] [2021-06-05 03:38:12,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520128695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828706685] [2021-06-05 03:38:12,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,726 INFO L87 Difference]: Start difference. First operand 144 states and 367 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,765 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2021-06-05 03:38:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,767 INFO L225 Difference]: With dead ends: 267 [2021-06-05 03:38:12,767 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 03:38:12,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 03:38:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2021-06-05 03:38:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.568345323741007) internal successors, (357), 139 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 357 transitions. [2021-06-05 03:38:12,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 357 transitions. Word has length 17 [2021-06-05 03:38:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,772 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 357 transitions. [2021-06-05 03:38:12,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 357 transitions. [2021-06-05 03:38:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 03:38:12,773 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1441474897, now seen corresponding path program 15 times [2021-06-05 03:38:12,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670227103] [2021-06-05 03:38:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670227103] [2021-06-05 03:38:12,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670227103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027539544] [2021-06-05 03:38:12,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,836 INFO L87 Difference]: Start difference. First operand 140 states and 357 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,866 INFO L93 Difference]: Finished difference Result 247 states and 583 transitions. [2021-06-05 03:38:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,867 INFO L225 Difference]: With dead ends: 247 [2021-06-05 03:38:12,867 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 03:38:12,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 03:38:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 132. [2021-06-05 03:38:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5419847328244276) internal successors, (333), 131 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 333 transitions. [2021-06-05 03:38:12,872 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 333 transitions. Word has length 17 [2021-06-05 03:38:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,872 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 333 transitions. [2021-06-05 03:38:12,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 333 transitions. [2021-06-05 03:38:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 03:38:12,873 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,874 INFO L82 PathProgramCache]: Analyzing trace with hash -422512687, now seen corresponding path program 16 times [2021-06-05 03:38:12,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012027754] [2021-06-05 03:38:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:12,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:12,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012027754] [2021-06-05 03:38:12,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012027754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:12,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:12,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:12,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215440399] [2021-06-05 03:38:12,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:12,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:12,940 INFO L87 Difference]: Start difference. First operand 132 states and 333 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:12,979 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2021-06-05 03:38:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:12,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:12,981 INFO L225 Difference]: With dead ends: 219 [2021-06-05 03:38:12,981 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 03:38:12,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 03:38:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-06-05 03:38:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.543307086614173) internal successors, (323), 127 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2021-06-05 03:38:12,985 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 17 [2021-06-05 03:38:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:12,985 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2021-06-05 03:38:12,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2021-06-05 03:38:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:12,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:12,986 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:12,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 03:38:12,986 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:12,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1264414673, now seen corresponding path program 17 times [2021-06-05 03:38:12,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:12,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108665453] [2021-06-05 03:38:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108665453] [2021-06-05 03:38:13,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108665453] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543345261] [2021-06-05 03:38:13,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,053 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,096 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2021-06-05 03:38:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,097 INFO L225 Difference]: With dead ends: 223 [2021-06-05 03:38:13,097 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 03:38:13,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 03:38:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-06-05 03:38:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.526315789473684) internal successors, (336), 133 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2021-06-05 03:38:13,102 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 17 [2021-06-05 03:38:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,102 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2021-06-05 03:38:13,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2021-06-05 03:38:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 03:38:13,103 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 936031791, now seen corresponding path program 18 times [2021-06-05 03:38:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208310796] [2021-06-05 03:38:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208310796] [2021-06-05 03:38:13,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208310796] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857736502] [2021-06-05 03:38:13,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,155 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,190 INFO L93 Difference]: Finished difference Result 177 states and 432 transitions. [2021-06-05 03:38:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,191 INFO L225 Difference]: With dead ends: 177 [2021-06-05 03:38:13,191 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 03:38:13,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 03:38:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 03:38:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.552) internal successors, (319), 125 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 319 transitions. [2021-06-05 03:38:13,194 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 319 transitions. Word has length 17 [2021-06-05 03:38:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,195 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 319 transitions. [2021-06-05 03:38:13,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 319 transitions. [2021-06-05 03:38:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,195 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 03:38:13,196 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1679709363, now seen corresponding path program 19 times [2021-06-05 03:38:13,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371302932] [2021-06-05 03:38:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371302932] [2021-06-05 03:38:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371302932] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649567585] [2021-06-05 03:38:13,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,249 INFO L87 Difference]: Start difference. First operand 126 states and 319 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,275 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2021-06-05 03:38:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,276 INFO L225 Difference]: With dead ends: 212 [2021-06-05 03:38:13,276 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 03:38:13,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 03:38:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 126. [2021-06-05 03:38:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.464) internal successors, (308), 125 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 308 transitions. [2021-06-05 03:38:13,280 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 308 transitions. Word has length 17 [2021-06-05 03:38:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,280 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 308 transitions. [2021-06-05 03:38:13,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 308 transitions. [2021-06-05 03:38:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 03:38:13,281 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1351326481, now seen corresponding path program 20 times [2021-06-05 03:38:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704331078] [2021-06-05 03:38:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704331078] [2021-06-05 03:38:13,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704331078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897255917] [2021-06-05 03:38:13,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,338 INFO L87 Difference]: Start difference. First operand 126 states and 308 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,374 INFO L93 Difference]: Finished difference Result 203 states and 474 transitions. [2021-06-05 03:38:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,375 INFO L225 Difference]: With dead ends: 203 [2021-06-05 03:38:13,375 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:38:13,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:38:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-06-05 03:38:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.4545454545454546) internal successors, (270), 110 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 270 transitions. [2021-06-05 03:38:13,381 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 270 transitions. Word has length 17 [2021-06-05 03:38:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,382 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 270 transitions. [2021-06-05 03:38:13,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 270 transitions. [2021-06-05 03:38:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 03:38:13,383 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash -363627631, now seen corresponding path program 21 times [2021-06-05 03:38:13,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302546831] [2021-06-05 03:38:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302546831] [2021-06-05 03:38:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302546831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115654900] [2021-06-05 03:38:13,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,436 INFO L87 Difference]: Start difference. First operand 111 states and 270 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,459 INFO L93 Difference]: Finished difference Result 174 states and 399 transitions. [2021-06-05 03:38:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,460 INFO L225 Difference]: With dead ends: 174 [2021-06-05 03:38:13,460 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 03:38:13,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 03:38:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-06-05 03:38:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-06-05 03:38:13,463 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-06-05 03:38:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,464 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-06-05 03:38:13,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-06-05 03:38:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 03:38:13,464 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1855122543, now seen corresponding path program 22 times [2021-06-05 03:38:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68872714] [2021-06-05 03:38:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68872714] [2021-06-05 03:38:13,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68872714] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110426853] [2021-06-05 03:38:13,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,519 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,553 INFO L93 Difference]: Finished difference Result 131 states and 297 transitions. [2021-06-05 03:38:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,554 INFO L225 Difference]: With dead ends: 131 [2021-06-05 03:38:13,554 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 03:38:13,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 03:38:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-06-05 03:38:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 175 transitions. [2021-06-05 03:38:13,556 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 175 transitions. Word has length 17 [2021-06-05 03:38:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,556 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 175 transitions. [2021-06-05 03:38:13,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 175 transitions. [2021-06-05 03:38:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 03:38:13,557 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,558 INFO L82 PathProgramCache]: Analyzing trace with hash -40818065, now seen corresponding path program 23 times [2021-06-05 03:38:13,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331552788] [2021-06-05 03:38:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331552788] [2021-06-05 03:38:13,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331552788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562044273] [2021-06-05 03:38:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,613 INFO L87 Difference]: Start difference. First operand 78 states and 175 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,646 INFO L93 Difference]: Finished difference Result 109 states and 239 transitions. [2021-06-05 03:38:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,647 INFO L225 Difference]: With dead ends: 109 [2021-06-05 03:38:13,647 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 03:38:13,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 03:38:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-05 03:38:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2021-06-05 03:38:13,650 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 17 [2021-06-05 03:38:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,650 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2021-06-05 03:38:13,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2021-06-05 03:38:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:38:13,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:38:13,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:38:13,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 03:38:13,651 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:38:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:38:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1630752815, now seen corresponding path program 24 times [2021-06-05 03:38:13,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:38:13,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829982975] [2021-06-05 03:38:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:38:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:38:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:38:13,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:38:13,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829982975] [2021-06-05 03:38:13,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829982975] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:38:13,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:38:13,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:38:13,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839160996] [2021-06-05 03:38:13,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:38:13,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:38:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:38:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:38:13,720 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:38:13,749 INFO L93 Difference]: Finished difference Result 63 states and 131 transitions. [2021-06-05 03:38:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:38:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 [2021-06-05 03:38:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:38:13,750 INFO L225 Difference]: With dead ends: 63 [2021-06-05 03:38:13,750 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 03:38:13,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:38:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 03:38:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 03:38:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:38:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 03:38:13,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-06-05 03:38:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:38:13,751 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 03:38:13,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-06-05 03:38:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 03:38:13,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 03:38:13,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 03:38:13,753 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:38:13,755 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:38:13 BasicIcfg [2021-06-05 03:38:13,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:38:13,756 INFO L168 Benchmark]: Toolchain (without parser) took 4112.78 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 344.2 MB in the beginning and 405.8 MB in the end (delta: -61.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.0 GB. [2021-06-05 03:38:13,756 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 364.9 MB. Free memory is still 345.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:38:13,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 364.9 MB. Free memory was 344.0 MB in the beginning and 342.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:38:13,756 INFO L168 Benchmark]: Boogie Preprocessor took 14.12 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 341.7 MB in the end (delta: 980.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:38:13,756 INFO L168 Benchmark]: RCFGBuilder took 238.12 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 332.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:38:13,756 INFO L168 Benchmark]: TraceAbstraction took 3817.06 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 331.8 MB in the beginning and 405.8 MB in the end (delta: -74.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:38:13,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 364.9 MB. Free memory is still 345.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 364.9 MB. Free memory was 344.0 MB in the beginning and 342.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.12 ms. Allocated memory is still 364.9 MB. Free memory was 342.7 MB in the beginning and 341.7 MB in the end (delta: 980.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 238.12 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 332.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3817.06 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 331.8 MB in the beginning and 405.8 MB in the end (delta: -74.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3687.2ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 61.4ms, AutomataDifference: 1058.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 81.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1010 SDtfs, 1212 SDslu, 1379 SDs, 0 SdLazy, 327 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 270.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1488.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=0, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 248.0ms AutomataMinimizationTime, 27 MinimizatonAttempts, 1410 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.0ms SsaConstructionTime, 63.4ms SatisfiabilityAnalysisTime, 1909.6ms InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 6156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...