/usr/bin/java -Xmx8000000000 -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_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:48:30,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:48:30,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:48:30,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:48:30,880 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 [2021-08-12 18:48:30,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:48:30,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:48:30,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:48:30,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:48:30,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:48:30,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:48:30,922 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:48:30,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:48:30,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:48:30,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:48:30,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:48:30,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:48:30,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:48:30,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:48:30,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:48:30,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:48:30,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:48:30,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:48:30,926 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:48:30,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:48:30,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:48:31,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:48:31,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:48:31,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:48:31,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:48:31,256 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:48:31,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_5.bpl [2021-08-12 18:48:31,257 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_5.bpl' [2021-08-12 18:48:31,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:48:31,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:48:31,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:48:31,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:48:31,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:48:31,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:48:31,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:48:31,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:48:31,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:48:31,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/1) ... [2021-08-12 18:48:31,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:48:31,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:48:31,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:48:31,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:48:31,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (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 [2021-08-12 18:48:31,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-08-12 18:48:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-08-12 18:48:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-08-12 18:48:31,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-08-12 18:48:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-08-12 18:48:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-08-12 18:48:31,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-08-12 18:48:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-08-12 18:48:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-08-12 18:48:31,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_4 given in one single declaration [2021-08-12 18:48:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure set_4 [2021-08-12 18:48:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure set_4 [2021-08-12 18:48:31,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-08-12 18:48:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-08-12 18:48:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-08-12 18:48:31,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:48:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:48:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:48:31,400 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:48:31,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:48:31,545 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:48:31,546 INFO L202 PluginConnector]: Adding new model example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:48:31 BoogieIcfgContainer [2021-08-12 18:48:31,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:48:31,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:48:31,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:48:31,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:48:31,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:48:31" (1/2) ... [2021-08-12 18:48:31,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386370ca and model type example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:48:31, skipping insertion in model container [2021-08-12 18:48:31,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:48:31" (2/2) ... [2021-08-12 18:48:31,554 INFO L111 eAbstractionObserver]: Analyzing ICFG example_5.bpl [2021-08-12 18:48:31,561 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:48:31,562 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:48:31,563 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:48:31,691 INFO L149 ThreadInstanceAdder]: Constructed 25 joinOtherThreadTransitions. [2021-08-12 18:48:31,721 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-12 18:48:31,755 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:48:31,755 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:48:31,755 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:48:31,755 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:48:31,755 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:48:31,755 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:48:31,755 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:48:31,755 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:48:31,768 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 48 transitions, 196 flow [2021-08-12 18:48:31,909 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:31,945 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:31,946 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:31,946 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash 921696598, now seen corresponding path program 1 times [2021-08-12 18:48:31,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:31,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871449617] [2021-08-12 18:48:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:32,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:32,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871449617] [2021-08-12 18:48:32,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871449617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:32,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:32,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:48:32,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257115347] [2021-08-12 18:48:32,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:48:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:48:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,124 INFO L87 Difference]: Start difference. First operand has 1148 states, 1146 states have (on average 3.7068062827225132) internal successors, (4248), 1147 states have internal predecessors, (4248), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:32,262 INFO L93 Difference]: Finished difference Result 1218 states and 4371 transitions. [2021-08-12 18:48:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:48:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:32,300 INFO L225 Difference]: With dead ends: 1218 [2021-08-12 18:48:32,300 INFO L226 Difference]: Without dead ends: 957 [2021-08-12 18:48:32,304 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-08-12 18:48:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2021-08-12 18:48:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.5658995815899583) internal successors, (3409), 956 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3409 transitions. [2021-08-12 18:48:32,425 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3409 transitions. Word has length 21 [2021-08-12 18:48:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:32,426 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3409 transitions. [2021-08-12 18:48:32,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3409 transitions. [2021-08-12 18:48:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:32,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:32,435 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:32,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:48:32,435 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash 79574102, now seen corresponding path program 1 times [2021-08-12 18:48:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850275236] [2021-08-12 18:48:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:32,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:32,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850275236] [2021-08-12 18:48:32,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850275236] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:32,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:32,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:48:32,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806784366] [2021-08-12 18:48:32,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:48:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:48:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,476 INFO L87 Difference]: Start difference. First operand 957 states and 3409 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:32,532 INFO L93 Difference]: Finished difference Result 971 states and 3422 transitions. [2021-08-12 18:48:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:48:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:32,542 INFO L225 Difference]: With dead ends: 971 [2021-08-12 18:48:32,542 INFO L226 Difference]: Without dead ends: 741 [2021-08-12 18:48:32,547 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-12 18:48:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2021-08-12 18:48:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.4756756756756757) internal successors, (2572), 740 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2572 transitions. [2021-08-12 18:48:32,605 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2572 transitions. Word has length 21 [2021-08-12 18:48:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:32,606 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2572 transitions. [2021-08-12 18:48:32,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2572 transitions. [2021-08-12 18:48:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:32,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:32,610 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:32,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:48:32,610 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1823307896, now seen corresponding path program 1 times [2021-08-12 18:48:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:32,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463386740] [2021-08-12 18:48:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:32,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:32,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463386740] [2021-08-12 18:48:32,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463386740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:32,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:32,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:48:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496542377] [2021-08-12 18:48:32,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:48:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:48:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,661 INFO L87 Difference]: Start difference. First operand 741 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:32,694 INFO L93 Difference]: Finished difference Result 743 states and 2573 transitions. [2021-08-12 18:48:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:48:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:32,700 INFO L225 Difference]: With dead ends: 743 [2021-08-12 18:48:32,701 INFO L226 Difference]: Without dead ends: 567 [2021-08-12 18:48:32,701 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-12 18:48:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-08-12 18:48:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.4363957597173145) internal successors, (1945), 566 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1945 transitions. [2021-08-12 18:48:32,728 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1945 transitions. Word has length 21 [2021-08-12 18:48:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1945 transitions. [2021-08-12 18:48:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1945 transitions. [2021-08-12 18:48:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:32,730 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:32,730 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:32,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 18:48:32,731 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1824113276, now seen corresponding path program 1 times [2021-08-12 18:48:32,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:32,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273252271] [2021-08-12 18:48:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:32,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:32,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273252271] [2021-08-12 18:48:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273252271] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:32,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:32,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360604797] [2021-08-12 18:48:32,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:32,949 INFO L87 Difference]: Start difference. First operand 567 states and 1945 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:33,153 INFO L93 Difference]: Finished difference Result 1268 states and 4073 transitions. [2021-08-12 18:48:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:33,162 INFO L225 Difference]: With dead ends: 1268 [2021-08-12 18:48:33,162 INFO L226 Difference]: Without dead ends: 1133 [2021-08-12 18:48:33,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-08-12 18:48:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 616. [2021-08-12 18:48:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.4) internal successors, (2091), 615 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2091 transitions. [2021-08-12 18:48:33,231 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2091 transitions. Word has length 21 [2021-08-12 18:48:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:33,231 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 2091 transitions. [2021-08-12 18:48:33,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2091 transitions. [2021-08-12 18:48:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:33,234 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:33,234 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:33,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 18:48:33,235 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1418935620, now seen corresponding path program 2 times [2021-08-12 18:48:33,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:33,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418261193] [2021-08-12 18:48:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:33,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418261193] [2021-08-12 18:48:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418261193] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:33,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:33,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:33,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654104552] [2021-08-12 18:48:33,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:33,426 INFO L87 Difference]: Start difference. First operand 616 states and 2091 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:33,657 INFO L93 Difference]: Finished difference Result 1251 states and 3996 transitions. [2021-08-12 18:48:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:33,666 INFO L225 Difference]: With dead ends: 1251 [2021-08-12 18:48:33,666 INFO L226 Difference]: Without dead ends: 1098 [2021-08-12 18:48:33,667 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-12 18:48:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 581. [2021-08-12 18:48:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.420689655172414) internal successors, (1984), 580 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1984 transitions. [2021-08-12 18:48:33,705 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1984 transitions. Word has length 21 [2021-08-12 18:48:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:33,706 INFO L482 AbstractCegarLoop]: Abstraction has 581 states and 1984 transitions. [2021-08-12 18:48:33,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1984 transitions. [2021-08-12 18:48:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:33,708 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:33,708 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:33,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:48:33,708 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 213760410, now seen corresponding path program 3 times [2021-08-12 18:48:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:33,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759451951] [2021-08-12 18:48:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:33,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759451951] [2021-08-12 18:48:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759451951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:33,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:33,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112582290] [2021-08-12 18:48:33,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:33,860 INFO L87 Difference]: Start difference. First operand 581 states and 1984 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:34,038 INFO L93 Difference]: Finished difference Result 1208 states and 3863 transitions. [2021-08-12 18:48:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:34,048 INFO L225 Difference]: With dead ends: 1208 [2021-08-12 18:48:34,048 INFO L226 Difference]: Without dead ends: 1104 [2021-08-12 18:48:34,049 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-08-12 18:48:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 601. [2021-08-12 18:48:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.4066666666666667) internal successors, (2044), 600 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 2044 transitions. [2021-08-12 18:48:34,110 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 2044 transitions. Word has length 21 [2021-08-12 18:48:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:34,115 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 2044 transitions. [2021-08-12 18:48:34,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 2044 transitions. [2021-08-12 18:48:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:34,119 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:34,119 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:34,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 18:48:34,120 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1651666564, now seen corresponding path program 4 times [2021-08-12 18:48:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274220826] [2021-08-12 18:48:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274220826] [2021-08-12 18:48:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274220826] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:34,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:34,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:34,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639988108] [2021-08-12 18:48:34,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:34,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:34,253 INFO L87 Difference]: Start difference. First operand 601 states and 2044 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:34,456 INFO L93 Difference]: Finished difference Result 1239 states and 3950 transitions. [2021-08-12 18:48:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:34,465 INFO L225 Difference]: With dead ends: 1239 [2021-08-12 18:48:34,466 INFO L226 Difference]: Without dead ends: 1084 [2021-08-12 18:48:34,470 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-08-12 18:48:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 581. [2021-08-12 18:48:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.4034482758620688) internal successors, (1974), 580 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1974 transitions. [2021-08-12 18:48:34,515 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1974 transitions. Word has length 21 [2021-08-12 18:48:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:34,517 INFO L482 AbstractCegarLoop]: Abstraction has 581 states and 1974 transitions. [2021-08-12 18:48:34,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1974 transitions. [2021-08-12 18:48:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:34,519 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:34,519 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:34,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 18:48:34,519 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1790028250, now seen corresponding path program 5 times [2021-08-12 18:48:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:34,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139046370] [2021-08-12 18:48:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:34,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:34,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139046370] [2021-08-12 18:48:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139046370] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:34,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:34,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242949784] [2021-08-12 18:48:34,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:34,627 INFO L87 Difference]: Start difference. First operand 581 states and 1974 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:34,837 INFO L93 Difference]: Finished difference Result 1183 states and 3775 transitions. [2021-08-12 18:48:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:34,845 INFO L225 Difference]: With dead ends: 1183 [2021-08-12 18:48:34,846 INFO L226 Difference]: Without dead ends: 1079 [2021-08-12 18:48:34,846 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-08-12 18:48:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 593. [2021-08-12 18:48:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.3885135135135136) internal successors, (2006), 592 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 2006 transitions. [2021-08-12 18:48:34,889 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 2006 transitions. Word has length 21 [2021-08-12 18:48:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:34,890 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 2006 transitions. [2021-08-12 18:48:34,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 2006 transitions. [2021-08-12 18:48:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:34,892 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:34,892 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:34,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 18:48:34,892 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash 856912858, now seen corresponding path program 6 times [2021-08-12 18:48:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:34,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653092033] [2021-08-12 18:48:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:34,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:34,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653092033] [2021-08-12 18:48:34,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653092033] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:34,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:34,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016736651] [2021-08-12 18:48:34,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:34,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:34,972 INFO L87 Difference]: Start difference. First operand 593 states and 2006 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:35,215 INFO L93 Difference]: Finished difference Result 1197 states and 3812 transitions. [2021-08-12 18:48:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:35,225 INFO L225 Difference]: With dead ends: 1197 [2021-08-12 18:48:35,225 INFO L226 Difference]: Without dead ends: 1053 [2021-08-12 18:48:35,226 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-08-12 18:48:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 567. [2021-08-12 18:48:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.4240282685512367) internal successors, (1938), 566 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1938 transitions. [2021-08-12 18:48:35,273 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1938 transitions. Word has length 21 [2021-08-12 18:48:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:35,273 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1938 transitions. [2021-08-12 18:48:35,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1938 transitions. [2021-08-12 18:48:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:35,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:35,278 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:35,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 18:48:35,279 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash -179046054, now seen corresponding path program 7 times [2021-08-12 18:48:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:35,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62996430] [2021-08-12 18:48:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:35,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:35,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62996430] [2021-08-12 18:48:35,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62996430] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:35,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:35,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:35,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598737240] [2021-08-12 18:48:35,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:35,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:35,390 INFO L87 Difference]: Start difference. First operand 567 states and 1938 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:35,617 INFO L93 Difference]: Finished difference Result 1299 states and 4182 transitions. [2021-08-12 18:48:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:35,625 INFO L225 Difference]: With dead ends: 1299 [2021-08-12 18:48:35,626 INFO L226 Difference]: Without dead ends: 1164 [2021-08-12 18:48:35,626 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-08-12 18:48:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 623. [2021-08-12 18:48:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.3858520900321545) internal successors, (2106), 622 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2106 transitions. [2021-08-12 18:48:35,671 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2106 transitions. Word has length 21 [2021-08-12 18:48:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:35,672 INFO L482 AbstractCegarLoop]: Abstraction has 623 states and 2106 transitions. [2021-08-12 18:48:35,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2106 transitions. [2021-08-12 18:48:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:35,674 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:35,674 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 18:48:35,674 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 872872346, now seen corresponding path program 8 times [2021-08-12 18:48:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381481183] [2021-08-12 18:48:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381481183] [2021-08-12 18:48:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381481183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:35,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:35,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:35,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707886998] [2021-08-12 18:48:35,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:35,761 INFO L87 Difference]: Start difference. First operand 623 states and 2106 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:35,998 INFO L93 Difference]: Finished difference Result 1282 states and 4105 transitions. [2021-08-12 18:48:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:36,007 INFO L225 Difference]: With dead ends: 1282 [2021-08-12 18:48:36,008 INFO L226 Difference]: Without dead ends: 1129 [2021-08-12 18:48:36,009 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-12 18:48:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 588. [2021-08-12 18:48:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.4003407155025553) internal successors, (1996), 587 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1996 transitions. [2021-08-12 18:48:36,053 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1996 transitions. Word has length 21 [2021-08-12 18:48:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:36,053 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1996 transitions. [2021-08-12 18:48:36,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1996 transitions. [2021-08-12 18:48:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:36,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:36,055 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:36,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-12 18:48:36,055 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2136036634, now seen corresponding path program 9 times [2021-08-12 18:48:36,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:36,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079524824] [2021-08-12 18:48:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:36,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079524824] [2021-08-12 18:48:36,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079524824] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:36,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:36,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:36,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2792322] [2021-08-12 18:48:36,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:36,153 INFO L87 Difference]: Start difference. First operand 588 states and 1996 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:36,396 INFO L93 Difference]: Finished difference Result 1288 states and 4137 transitions. [2021-08-12 18:48:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:36,407 INFO L225 Difference]: With dead ends: 1288 [2021-08-12 18:48:36,407 INFO L226 Difference]: Without dead ends: 1153 [2021-08-12 18:48:36,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-08-12 18:48:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 614. [2021-08-12 18:48:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.3719412724306688) internal successors, (2067), 613 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2067 transitions. [2021-08-12 18:48:36,455 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2067 transitions. Word has length 21 [2021-08-12 18:48:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:36,455 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2067 transitions. [2021-08-12 18:48:36,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2067 transitions. [2021-08-12 18:48:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:36,458 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:36,458 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:36,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-12 18:48:36,459 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash 929894012, now seen corresponding path program 10 times [2021-08-12 18:48:36,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:36,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342890488] [2021-08-12 18:48:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:36,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342890488] [2021-08-12 18:48:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342890488] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:36,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:36,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502294400] [2021-08-12 18:48:36,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:36,564 INFO L87 Difference]: Start difference. First operand 614 states and 2067 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:36,823 INFO L93 Difference]: Finished difference Result 1269 states and 4056 transitions. [2021-08-12 18:48:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:36,831 INFO L225 Difference]: With dead ends: 1269 [2021-08-12 18:48:36,832 INFO L226 Difference]: Without dead ends: 1127 [2021-08-12 18:48:36,832 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-08-12 18:48:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 588. [2021-08-12 18:48:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.3781942078364566) internal successors, (1983), 587 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1983 transitions. [2021-08-12 18:48:36,877 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1983 transitions. Word has length 21 [2021-08-12 18:48:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:36,877 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1983 transitions. [2021-08-12 18:48:36,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1983 transitions. [2021-08-12 18:48:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:36,879 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:36,879 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:36,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 18:48:36,879 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1110176068, now seen corresponding path program 11 times [2021-08-12 18:48:36,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:36,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197690685] [2021-08-12 18:48:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:36,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197690685] [2021-08-12 18:48:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197690685] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:36,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:36,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:36,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463564086] [2021-08-12 18:48:36,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:36,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:36,961 INFO L87 Difference]: Start difference. First operand 588 states and 1983 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:37,210 INFO L93 Difference]: Finished difference Result 1246 states and 3996 transitions. [2021-08-12 18:48:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:37,218 INFO L225 Difference]: With dead ends: 1246 [2021-08-12 18:48:37,218 INFO L226 Difference]: Without dead ends: 1128 [2021-08-12 18:48:37,219 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-12 18:48:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 606. [2021-08-12 18:48:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3619834710743803) internal successors, (2034), 605 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2034 transitions. [2021-08-12 18:48:37,263 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2034 transitions. Word has length 21 [2021-08-12 18:48:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:37,264 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2034 transitions. [2021-08-12 18:48:37,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2034 transitions. [2021-08-12 18:48:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:37,265 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:37,266 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:37,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-12 18:48:37,266 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1438558950, now seen corresponding path program 12 times [2021-08-12 18:48:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148086732] [2021-08-12 18:48:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:37,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:37,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148086732] [2021-08-12 18:48:37,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148086732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:37,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:37,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:37,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028141559] [2021-08-12 18:48:37,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:37,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:37,350 INFO L87 Difference]: Start difference. First operand 606 states and 2034 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:37,607 INFO L93 Difference]: Finished difference Result 1244 states and 3973 transitions. [2021-08-12 18:48:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:37,613 INFO L225 Difference]: With dead ends: 1244 [2021-08-12 18:48:37,613 INFO L226 Difference]: Without dead ends: 1089 [2021-08-12 18:48:37,614 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-12 18:48:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 567. [2021-08-12 18:48:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.408127208480565) internal successors, (1929), 566 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1929 transitions. [2021-08-12 18:48:37,665 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1929 transitions. Word has length 21 [2021-08-12 18:48:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:37,666 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1929 transitions. [2021-08-12 18:48:37,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1929 transitions. [2021-08-12 18:48:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:37,667 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:37,668 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:37,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-12 18:48:37,668 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1957163848, now seen corresponding path program 13 times [2021-08-12 18:48:37,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:37,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477341460] [2021-08-12 18:48:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:37,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:37,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477341460] [2021-08-12 18:48:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477341460] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:37,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:37,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870080695] [2021-08-12 18:48:37,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:37,778 INFO L87 Difference]: Start difference. First operand 567 states and 1929 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:37,990 INFO L93 Difference]: Finished difference Result 1193 states and 3821 transitions. [2021-08-12 18:48:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:37,996 INFO L225 Difference]: With dead ends: 1193 [2021-08-12 18:48:37,997 INFO L226 Difference]: Without dead ends: 1089 [2021-08-12 18:48:37,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-12 18:48:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 597. [2021-08-12 18:48:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.4060402684563758) internal successors, (2030), 596 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 2030 transitions. [2021-08-12 18:48:38,044 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 2030 transitions. Word has length 21 [2021-08-12 18:48:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:38,045 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 2030 transitions. [2021-08-12 18:48:38,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 2030 transitions. [2021-08-12 18:48:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:38,046 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:38,046 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:38,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-12 18:48:38,047 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash 472376474, now seen corresponding path program 14 times [2021-08-12 18:48:38,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:38,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256896574] [2021-08-12 18:48:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:38,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256896574] [2021-08-12 18:48:38,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256896574] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:38,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:38,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:38,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605661564] [2021-08-12 18:48:38,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:38,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:38,208 INFO L87 Difference]: Start difference. First operand 597 states and 2030 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:38,452 INFO L93 Difference]: Finished difference Result 1224 states and 3908 transitions. [2021-08-12 18:48:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:38,458 INFO L225 Difference]: With dead ends: 1224 [2021-08-12 18:48:38,458 INFO L226 Difference]: Without dead ends: 1069 [2021-08-12 18:48:38,459 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-08-12 18:48:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 577. [2021-08-12 18:48:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.4027777777777777) internal successors, (1960), 576 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1960 transitions. [2021-08-12 18:48:38,504 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1960 transitions. Word has length 21 [2021-08-12 18:48:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:38,504 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1960 transitions. [2021-08-12 18:48:38,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1960 transitions. [2021-08-12 18:48:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:38,506 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:38,506 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:38,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-12 18:48:38,506 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:38,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1419053670, now seen corresponding path program 15 times [2021-08-12 18:48:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:38,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025806242] [2021-08-12 18:48:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:38,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025806242] [2021-08-12 18:48:38,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025806242] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:38,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:38,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:38,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591571083] [2021-08-12 18:48:38,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:38,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:38,583 INFO L87 Difference]: Start difference. First operand 577 states and 1960 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:38,804 INFO L93 Difference]: Finished difference Result 1166 states and 3728 transitions. [2021-08-12 18:48:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:38,809 INFO L225 Difference]: With dead ends: 1166 [2021-08-12 18:48:38,809 INFO L226 Difference]: Without dead ends: 1062 [2021-08-12 18:48:38,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-08-12 18:48:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 589. [2021-08-12 18:48:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.3877551020408165) internal successors, (1992), 588 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1992 transitions. [2021-08-12 18:48:38,855 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1992 transitions. Word has length 21 [2021-08-12 18:48:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:38,855 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1992 transitions. [2021-08-12 18:48:38,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1992 transitions. [2021-08-12 18:48:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:38,857 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:38,857 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:38,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-12 18:48:38,857 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:38,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1264168858, now seen corresponding path program 16 times [2021-08-12 18:48:38,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:38,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261390106] [2021-08-12 18:48:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:38,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261390106] [2021-08-12 18:48:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261390106] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:38,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:38,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:38,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010940431] [2021-08-12 18:48:38,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:38,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:38,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:38,929 INFO L87 Difference]: Start difference. First operand 589 states and 1992 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:39,193 INFO L93 Difference]: Finished difference Result 1178 states and 3760 transitions. [2021-08-12 18:48:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:39,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:39,199 INFO L225 Difference]: With dead ends: 1178 [2021-08-12 18:48:39,199 INFO L226 Difference]: Without dead ends: 1050 [2021-08-12 18:48:39,200 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-08-12 18:48:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 577. [2021-08-12 18:48:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.392361111111111) internal successors, (1954), 576 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1954 transitions. [2021-08-12 18:48:39,245 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1954 transitions. Word has length 21 [2021-08-12 18:48:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:39,245 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1954 transitions. [2021-08-12 18:48:39,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1954 transitions. [2021-08-12 18:48:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:39,247 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:39,247 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:39,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-12 18:48:39,247 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 947468028, now seen corresponding path program 17 times [2021-08-12 18:48:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:39,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193095820] [2021-08-12 18:48:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:39,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193095820] [2021-08-12 18:48:39,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193095820] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:39,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:39,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:39,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449659067] [2021-08-12 18:48:39,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:39,322 INFO L87 Difference]: Start difference. First operand 577 states and 1954 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:39,572 INFO L93 Difference]: Finished difference Result 1242 states and 3973 transitions. [2021-08-12 18:48:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:39,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:39,577 INFO L225 Difference]: With dead ends: 1242 [2021-08-12 18:48:39,577 INFO L226 Difference]: Without dead ends: 1107 [2021-08-12 18:48:39,577 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-08-12 18:48:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 603. [2021-08-12 18:48:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.3637873754152823) internal successors, (2025), 602 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2025 transitions. [2021-08-12 18:48:39,635 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2025 transitions. Word has length 21 [2021-08-12 18:48:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:39,635 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2025 transitions. [2021-08-12 18:48:39,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2025 transitions. [2021-08-12 18:48:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:39,637 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:39,637 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:39,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-12 18:48:39,638 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1035404762, now seen corresponding path program 18 times [2021-08-12 18:48:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:39,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778254707] [2021-08-12 18:48:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778254707] [2021-08-12 18:48:39,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778254707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:39,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:39,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:39,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010631599] [2021-08-12 18:48:39,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:39,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:39,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:39,718 INFO L87 Difference]: Start difference. First operand 603 states and 2025 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:39,946 INFO L93 Difference]: Finished difference Result 1223 states and 3892 transitions. [2021-08-12 18:48:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:39,950 INFO L225 Difference]: With dead ends: 1223 [2021-08-12 18:48:39,950 INFO L226 Difference]: Without dead ends: 1071 [2021-08-12 18:48:39,951 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-08-12 18:48:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 567. [2021-08-12 18:48:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.3992932862190814) internal successors, (1924), 566 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1924 transitions. [2021-08-12 18:48:39,995 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1924 transitions. Word has length 21 [2021-08-12 18:48:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:39,995 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1924 transitions. [2021-08-12 18:48:39,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1924 transitions. [2021-08-12 18:48:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:39,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:39,997 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:39,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-12 18:48:39,997 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 873653722, now seen corresponding path program 19 times [2021-08-12 18:48:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587678050] [2021-08-12 18:48:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:40,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587678050] [2021-08-12 18:48:40,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587678050] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:40,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:40,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:40,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797919607] [2021-08-12 18:48:40,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:40,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:40,084 INFO L87 Difference]: Start difference. First operand 567 states and 1924 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:40,330 INFO L93 Difference]: Finished difference Result 1131 states and 3616 transitions. [2021-08-12 18:48:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:40,334 INFO L225 Difference]: With dead ends: 1131 [2021-08-12 18:48:40,334 INFO L226 Difference]: Without dead ends: 1027 [2021-08-12 18:48:40,335 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-08-12 18:48:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 585. [2021-08-12 18:48:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.392123287671233) internal successors, (1981), 584 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1981 transitions. [2021-08-12 18:48:40,383 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1981 transitions. Word has length 21 [2021-08-12 18:48:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:40,383 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1981 transitions. [2021-08-12 18:48:40,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1981 transitions. [2021-08-12 18:48:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:40,385 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:40,385 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:40,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-12 18:48:40,385 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash -59461670, now seen corresponding path program 20 times [2021-08-12 18:48:40,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:40,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911449887] [2021-08-12 18:48:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:40,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:40,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911449887] [2021-08-12 18:48:40,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911449887] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:40,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:40,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203530773] [2021-08-12 18:48:40,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:40,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:40,457 INFO L87 Difference]: Start difference. First operand 585 states and 1981 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:40,691 INFO L93 Difference]: Finished difference Result 1145 states and 3653 transitions. [2021-08-12 18:48:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:40,696 INFO L225 Difference]: With dead ends: 1145 [2021-08-12 18:48:40,696 INFO L226 Difference]: Without dead ends: 1015 [2021-08-12 18:48:40,696 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-08-12 18:48:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 573. [2021-08-12 18:48:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.3968531468531467) internal successors, (1943), 572 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1943 transitions. [2021-08-12 18:48:40,745 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1943 transitions. Word has length 21 [2021-08-12 18:48:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:40,745 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1943 transitions. [2021-08-12 18:48:40,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1943 transitions. [2021-08-12 18:48:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:40,747 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:40,747 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:40,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 18:48:40,747 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1169683272, now seen corresponding path program 21 times [2021-08-12 18:48:40,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:40,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364031600] [2021-08-12 18:48:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:40,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:40,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364031600] [2021-08-12 18:48:40,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364031600] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:40,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:40,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:40,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598898856] [2021-08-12 18:48:40,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:40,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:40,819 INFO L87 Difference]: Start difference. First operand 573 states and 1943 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:41,061 INFO L93 Difference]: Finished difference Result 1129 states and 3605 transitions. [2021-08-12 18:48:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:41,065 INFO L225 Difference]: With dead ends: 1129 [2021-08-12 18:48:41,065 INFO L226 Difference]: Without dead ends: 1025 [2021-08-12 18:48:41,066 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-08-12 18:48:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 585. [2021-08-12 18:48:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.381849315068493) internal successors, (1975), 584 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1975 transitions. [2021-08-12 18:48:41,116 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1975 transitions. Word has length 21 [2021-08-12 18:48:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:41,116 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1975 transitions. [2021-08-12 18:48:41,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1975 transitions. [2021-08-12 18:48:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:41,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:41,117 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:41,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-12 18:48:41,118 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash -65892390, now seen corresponding path program 22 times [2021-08-12 18:48:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:41,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130359097] [2021-08-12 18:48:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:41,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130359097] [2021-08-12 18:48:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130359097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:41,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:41,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:41,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338036960] [2021-08-12 18:48:41,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:41,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:41,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:41,195 INFO L87 Difference]: Start difference. First operand 585 states and 1975 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:41,446 INFO L93 Difference]: Finished difference Result 1141 states and 3637 transitions. [2021-08-12 18:48:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:41,451 INFO L225 Difference]: With dead ends: 1141 [2021-08-12 18:48:41,451 INFO L226 Difference]: Without dead ends: 1013 [2021-08-12 18:48:41,452 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-12 18:48:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 573. [2021-08-12 18:48:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.3863636363636362) internal successors, (1937), 572 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1937 transitions. [2021-08-12 18:48:41,503 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1937 transitions. Word has length 21 [2021-08-12 18:48:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:41,504 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1937 transitions. [2021-08-12 18:48:41,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1937 transitions. [2021-08-12 18:48:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:41,505 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:41,505 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:41,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-12 18:48:41,506 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1537010138, now seen corresponding path program 23 times [2021-08-12 18:48:41,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:41,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728808921] [2021-08-12 18:48:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728808921] [2021-08-12 18:48:41,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728808921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:41,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:41,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:41,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673897049] [2021-08-12 18:48:41,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:41,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:41,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:41,585 INFO L87 Difference]: Start difference. First operand 573 states and 1937 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:41,841 INFO L93 Difference]: Finished difference Result 1163 states and 3722 transitions. [2021-08-12 18:48:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:41,847 INFO L225 Difference]: With dead ends: 1163 [2021-08-12 18:48:41,847 INFO L226 Difference]: Without dead ends: 1045 [2021-08-12 18:48:41,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-12 18:48:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 591. [2021-08-12 18:48:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.369491525423729) internal successors, (1988), 590 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1988 transitions. [2021-08-12 18:48:41,901 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1988 transitions. Word has length 21 [2021-08-12 18:48:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:41,901 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1988 transitions. [2021-08-12 18:48:41,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1988 transitions. [2021-08-12 18:48:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:41,903 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:41,903 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:41,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-12 18:48:41,903 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1208627256, now seen corresponding path program 24 times [2021-08-12 18:48:41,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:41,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262075084] [2021-08-12 18:48:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:41,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:41,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262075084] [2021-08-12 18:48:41,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262075084] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:41,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:41,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:41,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773127816] [2021-08-12 18:48:41,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:41,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:41,974 INFO L87 Difference]: Start difference. First operand 591 states and 1988 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:42,317 INFO L93 Difference]: Finished difference Result 1161 states and 3699 transitions. [2021-08-12 18:48:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:42,322 INFO L225 Difference]: With dead ends: 1161 [2021-08-12 18:48:42,322 INFO L226 Difference]: Without dead ends: 1010 [2021-08-12 18:48:42,323 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-08-12 18:48:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 556. [2021-08-12 18:48:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.427027027027027) internal successors, (1902), 555 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1902 transitions. [2021-08-12 18:48:42,376 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1902 transitions. Word has length 21 [2021-08-12 18:48:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:42,376 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1902 transitions. [2021-08-12 18:48:42,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1902 transitions. [2021-08-12 18:48:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:42,378 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:42,378 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:42,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-12 18:48:42,378 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash -281686468, now seen corresponding path program 25 times [2021-08-12 18:48:42,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:42,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729060302] [2021-08-12 18:48:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729060302] [2021-08-12 18:48:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729060302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:42,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:42,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712435059] [2021-08-12 18:48:42,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:42,456 INFO L87 Difference]: Start difference. First operand 556 states and 1902 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:42,726 INFO L93 Difference]: Finished difference Result 1243 states and 3977 transitions. [2021-08-12 18:48:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:42,730 INFO L225 Difference]: With dead ends: 1243 [2021-08-12 18:48:42,730 INFO L226 Difference]: Without dead ends: 1108 [2021-08-12 18:48:42,730 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-08-12 18:48:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 591. [2021-08-12 18:48:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.3813559322033897) internal successors, (1995), 590 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1995 transitions. [2021-08-12 18:48:42,787 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1995 transitions. Word has length 21 [2021-08-12 18:48:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:42,787 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1995 transitions. [2021-08-12 18:48:42,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1995 transitions. [2021-08-12 18:48:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:42,789 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:42,789 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:42,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-12 18:48:42,789 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash 770231932, now seen corresponding path program 26 times [2021-08-12 18:48:42,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:42,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337492251] [2021-08-12 18:48:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:42,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:42,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337492251] [2021-08-12 18:48:42,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337492251] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:42,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:42,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:42,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740711281] [2021-08-12 18:48:42,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:42,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:42,867 INFO L87 Difference]: Start difference. First operand 591 states and 1995 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:43,162 INFO L93 Difference]: Finished difference Result 1226 states and 3900 transitions. [2021-08-12 18:48:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:43,170 INFO L225 Difference]: With dead ends: 1226 [2021-08-12 18:48:43,171 INFO L226 Difference]: Without dead ends: 1073 [2021-08-12 18:48:43,174 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-12 18:48:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 556. [2021-08-12 18:48:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.4018018018018017) internal successors, (1888), 555 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1888 transitions. [2021-08-12 18:48:43,231 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1888 transitions. Word has length 21 [2021-08-12 18:48:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:43,231 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1888 transitions. [2021-08-12 18:48:43,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1888 transitions. [2021-08-12 18:48:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:43,236 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:43,236 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:43,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-12 18:48:43,236 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1892039334, now seen corresponding path program 27 times [2021-08-12 18:48:43,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:43,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078612358] [2021-08-12 18:48:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:43,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:43,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078612358] [2021-08-12 18:48:43,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078612358] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:43,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:43,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:43,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835737883] [2021-08-12 18:48:43,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:43,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:43,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:43,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:43,344 INFO L87 Difference]: Start difference. First operand 556 states and 1888 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:43,612 INFO L93 Difference]: Finished difference Result 1183 states and 3767 transitions. [2021-08-12 18:48:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:43,616 INFO L225 Difference]: With dead ends: 1183 [2021-08-12 18:48:43,616 INFO L226 Difference]: Without dead ends: 1079 [2021-08-12 18:48:43,616 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-08-12 18:48:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 576. [2021-08-12 18:48:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.3878260869565215) internal successors, (1948), 575 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1948 transitions. [2021-08-12 18:48:43,668 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1948 transitions. Word has length 21 [2021-08-12 18:48:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:43,668 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1948 transitions. [2021-08-12 18:48:43,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1948 transitions. [2021-08-12 18:48:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:43,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:43,669 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:43,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-12 18:48:43,669 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 537500988, now seen corresponding path program 28 times [2021-08-12 18:48:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:43,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451117866] [2021-08-12 18:48:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:43,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:43,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451117866] [2021-08-12 18:48:43,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451117866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:43,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:43,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:43,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266139288] [2021-08-12 18:48:43,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:43,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:43,748 INFO L87 Difference]: Start difference. First operand 576 states and 1948 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:44,055 INFO L93 Difference]: Finished difference Result 1214 states and 3854 transitions. [2021-08-12 18:48:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:44,059 INFO L225 Difference]: With dead ends: 1214 [2021-08-12 18:48:44,059 INFO L226 Difference]: Without dead ends: 1059 [2021-08-12 18:48:44,060 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-08-12 18:48:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 556. [2021-08-12 18:48:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.383783783783784) internal successors, (1878), 555 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1878 transitions. [2021-08-12 18:48:44,116 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1878 transitions. Word has length 21 [2021-08-12 18:48:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:44,116 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1878 transitions. [2021-08-12 18:48:44,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1878 transitions. [2021-08-12 18:48:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:44,118 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:44,118 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:44,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-12 18:48:44,118 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:44,118 INFO L82 PathProgramCache]: Analyzing trace with hash -315771494, now seen corresponding path program 29 times [2021-08-12 18:48:44,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:44,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305404223] [2021-08-12 18:48:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:44,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:44,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305404223] [2021-08-12 18:48:44,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305404223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:44,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:44,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:44,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111198403] [2021-08-12 18:48:44,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:44,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:44,188 INFO L87 Difference]: Start difference. First operand 556 states and 1878 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:44,510 INFO L93 Difference]: Finished difference Result 1158 states and 3679 transitions. [2021-08-12 18:48:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:44,513 INFO L225 Difference]: With dead ends: 1158 [2021-08-12 18:48:44,513 INFO L226 Difference]: Without dead ends: 1054 [2021-08-12 18:48:44,514 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-08-12 18:48:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 568. [2021-08-12 18:48:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.368606701940035) internal successors, (1910), 567 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1910 transitions. [2021-08-12 18:48:44,556 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1910 transitions. Word has length 21 [2021-08-12 18:48:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:44,557 INFO L482 AbstractCegarLoop]: Abstraction has 568 states and 1910 transitions. [2021-08-12 18:48:44,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1910 transitions. [2021-08-12 18:48:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:44,558 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:44,558 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:44,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-12 18:48:44,558 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1248886886, now seen corresponding path program 30 times [2021-08-12 18:48:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:44,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516497373] [2021-08-12 18:48:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:44,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516497373] [2021-08-12 18:48:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516497373] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649343720] [2021-08-12 18:48:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:44,626 INFO L87 Difference]: Start difference. First operand 568 states and 1910 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:45,002 INFO L93 Difference]: Finished difference Result 1172 states and 3716 transitions. [2021-08-12 18:48:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:45,006 INFO L225 Difference]: With dead ends: 1172 [2021-08-12 18:48:45,006 INFO L226 Difference]: Without dead ends: 1028 [2021-08-12 18:48:45,006 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-08-12 18:48:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 542. [2021-08-12 18:48:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.406654343807763) internal successors, (1843), 541 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1843 transitions. [2021-08-12 18:48:45,057 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1843 transitions. Word has length 21 [2021-08-12 18:48:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:45,057 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1843 transitions. [2021-08-12 18:48:45,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1843 transitions. [2021-08-12 18:48:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:45,058 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:45,058 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:45,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-12 18:48:45,059 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2039974810, now seen corresponding path program 31 times [2021-08-12 18:48:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:45,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720284980] [2021-08-12 18:48:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720284980] [2021-08-12 18:48:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720284980] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:45,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:45,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630295224] [2021-08-12 18:48:45,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:45,149 INFO L87 Difference]: Start difference. First operand 542 states and 1843 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:45,518 INFO L93 Difference]: Finished difference Result 1208 states and 3851 transitions. [2021-08-12 18:48:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:45,522 INFO L225 Difference]: With dead ends: 1208 [2021-08-12 18:48:45,522 INFO L226 Difference]: Without dead ends: 1073 [2021-08-12 18:48:45,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-12 18:48:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 591. [2021-08-12 18:48:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.371186440677966) internal successors, (1989), 590 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1989 transitions. [2021-08-12 18:48:45,569 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1989 transitions. Word has length 21 [2021-08-12 18:48:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:45,569 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1989 transitions. [2021-08-12 18:48:45,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1989 transitions. [2021-08-12 18:48:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:45,570 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:45,570 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:45,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-12 18:48:45,571 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1203074086, now seen corresponding path program 32 times [2021-08-12 18:48:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:45,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246287587] [2021-08-12 18:48:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:45,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:45,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246287587] [2021-08-12 18:48:45,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246287587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:45,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:45,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:45,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511945682] [2021-08-12 18:48:45,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:45,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:45,666 INFO L87 Difference]: Start difference. First operand 591 states and 1989 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:45,989 INFO L93 Difference]: Finished difference Result 1191 states and 3774 transitions. [2021-08-12 18:48:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:45,992 INFO L225 Difference]: With dead ends: 1191 [2021-08-12 18:48:45,993 INFO L226 Difference]: Without dead ends: 1038 [2021-08-12 18:48:45,993 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-08-12 18:48:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 556. [2021-08-12 18:48:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.390990990990991) internal successors, (1882), 555 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1882 transitions. [2021-08-12 18:48:46,037 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1882 transitions. Word has length 21 [2021-08-12 18:48:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:46,037 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1882 transitions. [2021-08-12 18:48:46,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1882 transitions. [2021-08-12 18:48:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:46,038 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:46,038 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:46,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-12 18:48:46,039 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:46,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1641198536, now seen corresponding path program 1 times [2021-08-12 18:48:46,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:46,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859901935] [2021-08-12 18:48:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:46,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859901935] [2021-08-12 18:48:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859901935] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:48:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521718498] [2021-08-12 18:48:46,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:48:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:48:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:46,049 INFO L87 Difference]: Start difference. First operand 556 states and 1882 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:46,146 INFO L93 Difference]: Finished difference Result 597 states and 1964 transitions. [2021-08-12 18:48:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:48:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:46,150 INFO L225 Difference]: With dead ends: 597 [2021-08-12 18:48:46,150 INFO L226 Difference]: Without dead ends: 473 [2021-08-12 18:48:46,150 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:48:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-12 18:48:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2021-08-12 18:48:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.2860169491525424) internal successors, (1551), 472 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1551 transitions. [2021-08-12 18:48:46,198 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1551 transitions. Word has length 21 [2021-08-12 18:48:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:46,198 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1551 transitions. [2021-08-12 18:48:46,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1551 transitions. [2021-08-12 18:48:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:46,200 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:46,200 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-12 18:48:46,200 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1800136862, now seen corresponding path program 33 times [2021-08-12 18:48:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960985132] [2021-08-12 18:48:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:46,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960985132] [2021-08-12 18:48:46,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960985132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:46,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:46,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:46,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286616225] [2021-08-12 18:48:46,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:46,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:46,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:46,304 INFO L87 Difference]: Start difference. First operand 473 states and 1551 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:46,551 INFO L93 Difference]: Finished difference Result 941 states and 2858 transitions. [2021-08-12 18:48:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:46,554 INFO L225 Difference]: With dead ends: 941 [2021-08-12 18:48:46,554 INFO L226 Difference]: Without dead ends: 861 [2021-08-12 18:48:46,555 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-12 18:48:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 489. [2021-08-12 18:48:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.276639344262295) internal successors, (1599), 488 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1599 transitions. [2021-08-12 18:48:46,606 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1599 transitions. Word has length 21 [2021-08-12 18:48:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:46,606 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1599 transitions. [2021-08-12 18:48:46,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1599 transitions. [2021-08-12 18:48:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:46,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:46,607 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:46,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-12 18:48:46,607 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1471753980, now seen corresponding path program 34 times [2021-08-12 18:48:46,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:46,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761175882] [2021-08-12 18:48:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:46,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:46,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761175882] [2021-08-12 18:48:46,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761175882] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:46,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:46,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:46,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799252169] [2021-08-12 18:48:46,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:46,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:46,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:46,687 INFO L87 Difference]: Start difference. First operand 489 states and 1599 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:46,948 INFO L93 Difference]: Finished difference Result 925 states and 2802 transitions. [2021-08-12 18:48:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:46,951 INFO L225 Difference]: With dead ends: 925 [2021-08-12 18:48:46,951 INFO L226 Difference]: Without dead ends: 798 [2021-08-12 18:48:46,952 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-12 18:48:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 473. [2021-08-12 18:48:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.2690677966101696) internal successors, (1543), 472 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1543 transitions. [2021-08-12 18:48:46,990 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1543 transitions. Word has length 21 [2021-08-12 18:48:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:46,991 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1543 transitions. [2021-08-12 18:48:46,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1543 transitions. [2021-08-12 18:48:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:46,992 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:46,992 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:46,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-12 18:48:46,992 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -243200132, now seen corresponding path program 35 times [2021-08-12 18:48:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:46,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123643839] [2021-08-12 18:48:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:47,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123643839] [2021-08-12 18:48:47,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123643839] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:47,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:47,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011212041] [2021-08-12 18:48:47,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:47,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:47,083 INFO L87 Difference]: Start difference. First operand 473 states and 1543 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:47,339 INFO L93 Difference]: Finished difference Result 916 states and 2772 transitions. [2021-08-12 18:48:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:47,342 INFO L225 Difference]: With dead ends: 916 [2021-08-12 18:48:47,342 INFO L226 Difference]: Without dead ends: 836 [2021-08-12 18:48:47,343 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-12 18:48:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 481. [2021-08-12 18:48:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.25625) internal successors, (1563), 480 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1563 transitions. [2021-08-12 18:48:47,386 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1563 transitions. Word has length 21 [2021-08-12 18:48:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:47,386 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1563 transitions. [2021-08-12 18:48:47,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1563 transitions. [2021-08-12 18:48:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:47,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:47,387 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:47,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-12 18:48:47,388 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1734695044, now seen corresponding path program 36 times [2021-08-12 18:48:47,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:47,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473570866] [2021-08-12 18:48:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:47,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473570866] [2021-08-12 18:48:47,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473570866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:47,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:47,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135464375] [2021-08-12 18:48:47,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:47,470 INFO L87 Difference]: Start difference. First operand 481 states and 1563 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:47,761 INFO L93 Difference]: Finished difference Result 900 states and 2716 transitions. [2021-08-12 18:48:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:47,765 INFO L225 Difference]: With dead ends: 900 [2021-08-12 18:48:47,765 INFO L226 Difference]: Without dead ends: 786 [2021-08-12 18:48:47,765 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-08-12 18:48:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 461. [2021-08-12 18:48:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.2891304347826087) internal successors, (1513), 460 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1513 transitions. [2021-08-12 18:48:47,803 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1513 transitions. Word has length 21 [2021-08-12 18:48:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:47,803 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1513 transitions. [2021-08-12 18:48:47,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1513 transitions. [2021-08-12 18:48:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:47,803 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:47,804 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:47,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-12 18:48:47,804 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 749113148, now seen corresponding path program 37 times [2021-08-12 18:48:47,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:47,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781499534] [2021-08-12 18:48:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:47,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:47,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781499534] [2021-08-12 18:48:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781499534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:47,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880366361] [2021-08-12 18:48:47,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:47,881 INFO L87 Difference]: Start difference. First operand 461 states and 1513 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:48,156 INFO L93 Difference]: Finished difference Result 928 states and 2840 transitions. [2021-08-12 18:48:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:48,160 INFO L225 Difference]: With dead ends: 928 [2021-08-12 18:48:48,160 INFO L226 Difference]: Without dead ends: 840 [2021-08-12 18:48:48,161 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-08-12 18:48:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 477. [2021-08-12 18:48:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.28781512605042) internal successors, (1565), 476 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1565 transitions. [2021-08-12 18:48:48,208 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1565 transitions. Word has length 21 [2021-08-12 18:48:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:48,208 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1565 transitions. [2021-08-12 18:48:48,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1565 transitions. [2021-08-12 18:48:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:48,209 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:48,209 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:48,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-12 18:48:48,209 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 997222278, now seen corresponding path program 38 times [2021-08-12 18:48:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:48,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73705210] [2021-08-12 18:48:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:48,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73705210] [2021-08-12 18:48:48,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73705210] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:48,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:48,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710871461] [2021-08-12 18:48:48,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:48,293 INFO L87 Difference]: Start difference. First operand 477 states and 1565 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:48,564 INFO L93 Difference]: Finished difference Result 920 states and 2804 transitions. [2021-08-12 18:48:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:48,567 INFO L225 Difference]: With dead ends: 920 [2021-08-12 18:48:48,567 INFO L226 Difference]: Without dead ends: 832 [2021-08-12 18:48:48,568 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-12 18:48:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 469. [2021-08-12 18:48:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.2927350427350426) internal successors, (1541), 468 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1541 transitions. [2021-08-12 18:48:48,606 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1541 transitions. Word has length 21 [2021-08-12 18:48:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:48,606 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1541 transitions. [2021-08-12 18:48:48,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1541 transitions. [2021-08-12 18:48:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:48,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:48,607 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:48,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-12 18:48:48,607 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1294223846, now seen corresponding path program 39 times [2021-08-12 18:48:48,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:48,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161013778] [2021-08-12 18:48:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:48,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161013778] [2021-08-12 18:48:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161013778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051089356] [2021-08-12 18:48:48,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:48,720 INFO L87 Difference]: Start difference. First operand 469 states and 1541 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:49,051 INFO L93 Difference]: Finished difference Result 951 states and 2903 transitions. [2021-08-12 18:48:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:49,055 INFO L225 Difference]: With dead ends: 951 [2021-08-12 18:48:49,055 INFO L226 Difference]: Without dead ends: 863 [2021-08-12 18:48:49,055 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-08-12 18:48:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 489. [2021-08-12 18:48:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.2807377049180326) internal successors, (1601), 488 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1601 transitions. [2021-08-12 18:48:49,098 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1601 transitions. Word has length 21 [2021-08-12 18:48:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:49,098 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1601 transitions. [2021-08-12 18:48:49,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1601 transitions. [2021-08-12 18:48:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:49,100 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:49,100 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:49,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-12 18:48:49,100 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2141739260, now seen corresponding path program 40 times [2021-08-12 18:48:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:49,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55940013] [2021-08-12 18:48:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:49,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:49,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55940013] [2021-08-12 18:48:49,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55940013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:49,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:49,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:49,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9750152] [2021-08-12 18:48:49,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:49,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:49,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:49,196 INFO L87 Difference]: Start difference. First operand 489 states and 1601 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:49,503 INFO L93 Difference]: Finished difference Result 974 states and 2958 transitions. [2021-08-12 18:48:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:49,507 INFO L225 Difference]: With dead ends: 974 [2021-08-12 18:48:49,507 INFO L226 Difference]: Without dead ends: 843 [2021-08-12 18:48:49,507 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-12 18:48:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 469. [2021-08-12 18:48:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.2756410256410255) internal successors, (1533), 468 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1533 transitions. [2021-08-12 18:48:49,548 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1533 transitions. Word has length 21 [2021-08-12 18:48:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1533 transitions. [2021-08-12 18:48:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1533 transitions. [2021-08-12 18:48:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:49,549 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:49,549 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:49,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-12 18:48:49,549 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash 644082788, now seen corresponding path program 41 times [2021-08-12 18:48:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:49,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610465198] [2021-08-12 18:48:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:49,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:49,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610465198] [2021-08-12 18:48:49,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610465198] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972851306] [2021-08-12 18:48:49,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:49,657 INFO L87 Difference]: Start difference. First operand 469 states and 1533 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:49,994 INFO L93 Difference]: Finished difference Result 931 states and 2823 transitions. [2021-08-12 18:48:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:49,997 INFO L225 Difference]: With dead ends: 931 [2021-08-12 18:48:49,997 INFO L226 Difference]: Without dead ends: 851 [2021-08-12 18:48:49,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-08-12 18:48:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 485. [2021-08-12 18:48:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.2665289256198347) internal successors, (1581), 484 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1581 transitions. [2021-08-12 18:48:50,040 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1581 transitions. Word has length 21 [2021-08-12 18:48:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:50,040 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1581 transitions. [2021-08-12 18:48:50,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1581 transitions. [2021-08-12 18:48:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:50,041 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:50,041 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:50,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-12 18:48:50,041 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash -945851962, now seen corresponding path program 42 times [2021-08-12 18:48:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:50,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357873654] [2021-08-12 18:48:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:50,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357873654] [2021-08-12 18:48:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357873654] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:50,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:50,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:50,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063078076] [2021-08-12 18:48:50,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:50,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:50,126 INFO L87 Difference]: Start difference. First operand 485 states and 1581 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:50,469 INFO L93 Difference]: Finished difference Result 915 states and 2767 transitions. [2021-08-12 18:48:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:50,473 INFO L225 Difference]: With dead ends: 915 [2021-08-12 18:48:50,473 INFO L226 Difference]: Without dead ends: 780 [2021-08-12 18:48:50,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-12 18:48:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 461. [2021-08-12 18:48:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.2804347826086957) internal successors, (1509), 460 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1509 transitions. [2021-08-12 18:48:50,522 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1509 transitions. Word has length 21 [2021-08-12 18:48:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:50,522 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1509 transitions. [2021-08-12 18:48:50,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1509 transitions. [2021-08-12 18:48:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:50,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:50,523 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:50,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-12 18:48:50,523 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:50,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:50,523 INFO L82 PathProgramCache]: Analyzing trace with hash -97683814, now seen corresponding path program 43 times [2021-08-12 18:48:50,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:50,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037256968] [2021-08-12 18:48:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:50,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037256968] [2021-08-12 18:48:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037256968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:50,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:50,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:50,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374403786] [2021-08-12 18:48:50,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:50,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:50,590 INFO L87 Difference]: Start difference. First operand 461 states and 1509 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:50,919 INFO L93 Difference]: Finished difference Result 891 states and 2714 transitions. [2021-08-12 18:48:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:50,923 INFO L225 Difference]: With dead ends: 891 [2021-08-12 18:48:50,923 INFO L226 Difference]: Without dead ends: 803 [2021-08-12 18:48:50,923 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-08-12 18:48:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 473. [2021-08-12 18:48:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.2733050847457625) internal successors, (1545), 472 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1545 transitions. [2021-08-12 18:48:50,965 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1545 transitions. Word has length 21 [2021-08-12 18:48:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:50,965 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1545 transitions. [2021-08-12 18:48:50,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1545 transitions. [2021-08-12 18:48:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:50,966 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:50,966 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:50,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-12 18:48:50,966 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 150425316, now seen corresponding path program 44 times [2021-08-12 18:48:50,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:50,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333872809] [2021-08-12 18:48:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:51,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333872809] [2021-08-12 18:48:51,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333872809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:51,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:51,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:51,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687375627] [2021-08-12 18:48:51,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:51,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:51,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:51,038 INFO L87 Difference]: Start difference. First operand 473 states and 1545 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:51,340 INFO L93 Difference]: Finished difference Result 883 states and 2678 transitions. [2021-08-12 18:48:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:51,343 INFO L225 Difference]: With dead ends: 883 [2021-08-12 18:48:51,343 INFO L226 Difference]: Without dead ends: 795 [2021-08-12 18:48:51,344 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-08-12 18:48:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 465. [2021-08-12 18:48:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.2780172413793105) internal successors, (1521), 464 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1521 transitions. [2021-08-12 18:48:51,385 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1521 transitions. Word has length 21 [2021-08-12 18:48:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:51,386 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1521 transitions. [2021-08-12 18:48:51,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1521 transitions. [2021-08-12 18:48:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:51,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:51,386 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-12 18:48:51,387 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:51,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1094782618, now seen corresponding path program 45 times [2021-08-12 18:48:51,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:51,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962415135] [2021-08-12 18:48:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:51,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962415135] [2021-08-12 18:48:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962415135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:51,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:51,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:51,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70943767] [2021-08-12 18:48:51,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:51,472 INFO L87 Difference]: Start difference. First operand 465 states and 1521 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:51,780 INFO L93 Difference]: Finished difference Result 897 states and 2727 transitions. [2021-08-12 18:48:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:51,783 INFO L225 Difference]: With dead ends: 897 [2021-08-12 18:48:51,783 INFO L226 Difference]: Without dead ends: 809 [2021-08-12 18:48:51,784 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-12 18:48:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 477. [2021-08-12 18:48:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.2626050420168067) internal successors, (1553), 476 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1553 transitions. [2021-08-12 18:48:51,834 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1553 transitions. Word has length 21 [2021-08-12 18:48:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:51,835 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1553 transitions. [2021-08-12 18:48:51,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1553 transitions. [2021-08-12 18:48:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:51,835 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:51,835 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:51,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-12 18:48:51,836 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -421844740, now seen corresponding path program 46 times [2021-08-12 18:48:51,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:51,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272221814] [2021-08-12 18:48:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:51,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272221814] [2021-08-12 18:48:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272221814] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:51,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:51,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:51,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004247674] [2021-08-12 18:48:51,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:51,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:51,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:51,903 INFO L87 Difference]: Start difference. First operand 477 states and 1553 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:52,229 INFO L93 Difference]: Finished difference Result 903 states and 2732 transitions. [2021-08-12 18:48:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:52,233 INFO L225 Difference]: With dead ends: 903 [2021-08-12 18:48:52,233 INFO L226 Difference]: Without dead ends: 797 [2021-08-12 18:48:52,233 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-12 18:48:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 465. [2021-08-12 18:48:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.269396551724138) internal successors, (1517), 464 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1517 transitions. [2021-08-12 18:48:52,277 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1517 transitions. Word has length 21 [2021-08-12 18:48:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:52,277 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1517 transitions. [2021-08-12 18:48:52,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1517 transitions. [2021-08-12 18:48:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:52,277 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:52,278 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:52,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-12 18:48:52,278 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1261878044, now seen corresponding path program 47 times [2021-08-12 18:48:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:52,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981275237] [2021-08-12 18:48:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:52,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:52,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981275237] [2021-08-12 18:48:52,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981275237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:52,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:52,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404206102] [2021-08-12 18:48:52,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:52,361 INFO L87 Difference]: Start difference. First operand 465 states and 1517 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:52,667 INFO L93 Difference]: Finished difference Result 877 states and 2651 transitions. [2021-08-12 18:48:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:52,671 INFO L225 Difference]: With dead ends: 877 [2021-08-12 18:48:52,672 INFO L226 Difference]: Without dead ends: 797 [2021-08-12 18:48:52,672 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-12 18:48:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 473. [2021-08-12 18:48:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.2563559322033897) internal successors, (1537), 472 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1537 transitions. [2021-08-12 18:48:52,717 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1537 transitions. Word has length 21 [2021-08-12 18:48:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:52,717 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1537 transitions. [2021-08-12 18:48:52,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1537 transitions. [2021-08-12 18:48:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:52,718 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:52,718 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:52,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-12 18:48:52,718 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1464160710, now seen corresponding path program 48 times [2021-08-12 18:48:52,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:52,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976476760] [2021-08-12 18:48:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:52,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976476760] [2021-08-12 18:48:52,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976476760] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:52,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:52,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455808457] [2021-08-12 18:48:52,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:52,800 INFO L87 Difference]: Start difference. First operand 473 states and 1537 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:53,126 INFO L93 Difference]: Finished difference Result 861 states and 2595 transitions. [2021-08-12 18:48:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:53,131 INFO L225 Difference]: With dead ends: 861 [2021-08-12 18:48:53,131 INFO L226 Difference]: Without dead ends: 749 [2021-08-12 18:48:53,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-08-12 18:48:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 455. [2021-08-12 18:48:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.297356828193833) internal successors, (1497), 454 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1497 transitions. [2021-08-12 18:48:53,176 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1497 transitions. Word has length 21 [2021-08-12 18:48:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:53,176 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1497 transitions. [2021-08-12 18:48:53,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1497 transitions. [2021-08-12 18:48:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:53,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:53,177 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:53,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-12 18:48:53,177 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1149207288, now seen corresponding path program 49 times [2021-08-12 18:48:53,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:53,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218703763] [2021-08-12 18:48:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:53,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:53,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218703763] [2021-08-12 18:48:53,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218703763] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:53,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:53,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:53,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606100644] [2021-08-12 18:48:53,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:53,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:53,255 INFO L87 Difference]: Start difference. First operand 455 states and 1497 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:53,617 INFO L93 Difference]: Finished difference Result 983 states and 2990 transitions. [2021-08-12 18:48:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:53,621 INFO L225 Difference]: With dead ends: 983 [2021-08-12 18:48:53,621 INFO L226 Difference]: Without dead ends: 872 [2021-08-12 18:48:53,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-08-12 18:48:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 486. [2021-08-12 18:48:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.2494845360824742) internal successors, (1576), 485 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1576 transitions. [2021-08-12 18:48:53,668 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1576 transitions. Word has length 21 [2021-08-12 18:48:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:53,668 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1576 transitions. [2021-08-12 18:48:53,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1576 transitions. [2021-08-12 18:48:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:53,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:53,669 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:53,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-12 18:48:53,669 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:53,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2093841608, now seen corresponding path program 50 times [2021-08-12 18:48:53,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:53,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458037920] [2021-08-12 18:48:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:53,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:53,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458037920] [2021-08-12 18:48:53,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458037920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:53,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:53,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:53,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060301168] [2021-08-12 18:48:53,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:53,747 INFO L87 Difference]: Start difference. First operand 486 states and 1576 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:54,113 INFO L93 Difference]: Finished difference Result 966 states and 2917 transitions. [2021-08-12 18:48:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:54,117 INFO L225 Difference]: With dead ends: 966 [2021-08-12 18:48:54,117 INFO L226 Difference]: Without dead ends: 841 [2021-08-12 18:48:54,117 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-12 18:48:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 455. [2021-08-12 18:48:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.2709251101321586) internal successors, (1485), 454 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1485 transitions. [2021-08-12 18:48:54,163 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1485 transitions. Word has length 21 [2021-08-12 18:48:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:54,163 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1485 transitions. [2021-08-12 18:48:54,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1485 transitions. [2021-08-12 18:48:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:54,164 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:54,164 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:54,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-12 18:48:54,164 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 909369340, now seen corresponding path program 51 times [2021-08-12 18:48:54,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:54,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140209707] [2021-08-12 18:48:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:54,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:54,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140209707] [2021-08-12 18:48:54,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140209707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:54,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:54,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663471785] [2021-08-12 18:48:54,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:54,265 INFO L87 Difference]: Start difference. First operand 455 states and 1485 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:54,622 INFO L93 Difference]: Finished difference Result 923 states and 2792 transitions. [2021-08-12 18:48:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:54,626 INFO L225 Difference]: With dead ends: 923 [2021-08-12 18:48:54,626 INFO L226 Difference]: Without dead ends: 843 [2021-08-12 18:48:54,626 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-12 18:48:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 471. [2021-08-12 18:48:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.2617021276595746) internal successors, (1533), 470 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1533 transitions. [2021-08-12 18:48:54,674 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1533 transitions. Word has length 21 [2021-08-12 18:48:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1533 transitions. [2021-08-12 18:48:54,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1533 transitions. [2021-08-12 18:48:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:54,675 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:54,675 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:54,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-12 18:48:54,675 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 580986458, now seen corresponding path program 52 times [2021-08-12 18:48:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:54,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684397132] [2021-08-12 18:48:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:54,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684397132] [2021-08-12 18:48:54,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684397132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:54,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:54,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:54,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775237559] [2021-08-12 18:48:54,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:54,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:54,753 INFO L87 Difference]: Start difference. First operand 471 states and 1533 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:55,123 INFO L93 Difference]: Finished difference Result 954 states and 2879 transitions. [2021-08-12 18:48:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:55,126 INFO L225 Difference]: With dead ends: 954 [2021-08-12 18:48:55,126 INFO L226 Difference]: Without dead ends: 827 [2021-08-12 18:48:55,127 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-12 18:48:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 455. [2021-08-12 18:48:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.253303964757709) internal successors, (1477), 454 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1477 transitions. [2021-08-12 18:48:55,177 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1477 transitions. Word has length 21 [2021-08-12 18:48:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:55,177 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1477 transitions. [2021-08-12 18:48:55,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1477 transitions. [2021-08-12 18:48:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:55,178 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:55,178 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:55,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-12 18:48:55,178 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1133967654, now seen corresponding path program 53 times [2021-08-12 18:48:55,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:55,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46768015] [2021-08-12 18:48:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:55,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:55,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46768015] [2021-08-12 18:48:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46768015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:55,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:55,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807501261] [2021-08-12 18:48:55,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:55,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:55,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:55,263 INFO L87 Difference]: Start difference. First operand 455 states and 1477 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:55,617 INFO L93 Difference]: Finished difference Result 898 states and 2706 transitions. [2021-08-12 18:48:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:55,620 INFO L225 Difference]: With dead ends: 898 [2021-08-12 18:48:55,621 INFO L226 Difference]: Without dead ends: 818 [2021-08-12 18:48:55,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-12 18:48:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 463. [2021-08-12 18:48:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.24025974025974) internal successors, (1497), 462 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1497 transitions. [2021-08-12 18:48:55,667 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1497 transitions. Word has length 21 [2021-08-12 18:48:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:55,667 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1497 transitions. [2021-08-12 18:48:55,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1497 transitions. [2021-08-12 18:48:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:55,668 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:55,668 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:55,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-12 18:48:55,668 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1669504730, now seen corresponding path program 54 times [2021-08-12 18:48:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:55,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607585700] [2021-08-12 18:48:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607585700] [2021-08-12 18:48:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607585700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:55,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:55,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468294402] [2021-08-12 18:48:55,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:55,751 INFO L87 Difference]: Start difference. First operand 463 states and 1497 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:56,127 INFO L93 Difference]: Finished difference Result 912 states and 2743 transitions. [2021-08-12 18:48:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:56,131 INFO L225 Difference]: With dead ends: 912 [2021-08-12 18:48:56,131 INFO L226 Difference]: Without dead ends: 798 [2021-08-12 18:48:56,131 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-12 18:48:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 443. [2021-08-12 18:48:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.273755656108597) internal successors, (1447), 442 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1447 transitions. [2021-08-12 18:48:56,181 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1447 transitions. Word has length 21 [2021-08-12 18:48:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1447 transitions. [2021-08-12 18:48:56,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1447 transitions. [2021-08-12 18:48:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:56,182 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:56,182 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:56,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-12 18:48:56,182 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2053126694, now seen corresponding path program 55 times [2021-08-12 18:48:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313935512] [2021-08-12 18:48:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:56,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:56,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313935512] [2021-08-12 18:48:56,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313935512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:56,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:56,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:56,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456254868] [2021-08-12 18:48:56,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:56,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:56,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:56,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:56,246 INFO L87 Difference]: Start difference. First operand 443 states and 1447 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:56,642 INFO L93 Difference]: Finished difference Result 964 states and 2924 transitions. [2021-08-12 18:48:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:56,646 INFO L225 Difference]: With dead ends: 964 [2021-08-12 18:48:56,646 INFO L226 Difference]: Without dead ends: 853 [2021-08-12 18:48:56,647 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-12 18:48:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 443. [2021-08-12 18:48:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2217194570135748) internal successors, (1424), 442 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1424 transitions. [2021-08-12 18:48:56,696 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1424 transitions. Word has length 21 [2021-08-12 18:48:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:56,696 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1424 transitions. [2021-08-12 18:48:56,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1424 transitions. [2021-08-12 18:48:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:56,697 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:56,697 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:56,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-12 18:48:56,697 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1001208294, now seen corresponding path program 56 times [2021-08-12 18:48:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28710573] [2021-08-12 18:48:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:56,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:56,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28710573] [2021-08-12 18:48:56,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28710573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:56,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:56,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:56,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734568219] [2021-08-12 18:48:56,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:56,777 INFO L87 Difference]: Start difference. First operand 443 states and 1424 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:57,178 INFO L93 Difference]: Finished difference Result 947 states and 2851 transitions. [2021-08-12 18:48:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:57,182 INFO L225 Difference]: With dead ends: 947 [2021-08-12 18:48:57,182 INFO L226 Difference]: Without dead ends: 822 [2021-08-12 18:48:57,182 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-12 18:48:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 412. [2021-08-12 18:48:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.236009732360097) internal successors, (1330), 411 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1330 transitions. [2021-08-12 18:48:57,230 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1330 transitions. Word has length 21 [2021-08-12 18:48:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:57,231 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1330 transitions. [2021-08-12 18:48:57,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1330 transitions. [2021-08-12 18:48:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:57,231 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:57,231 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:57,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-12 18:48:57,231 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1785983304, now seen corresponding path program 57 times [2021-08-12 18:48:57,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:57,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885466341] [2021-08-12 18:48:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:57,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885466341] [2021-08-12 18:48:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885466341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:57,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:57,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235310222] [2021-08-12 18:48:57,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:57,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:57,303 INFO L87 Difference]: Start difference. First operand 412 states and 1330 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:57,704 INFO L93 Difference]: Finished difference Result 906 states and 2738 transitions. [2021-08-12 18:48:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:57,707 INFO L225 Difference]: With dead ends: 906 [2021-08-12 18:48:57,707 INFO L226 Difference]: Without dead ends: 795 [2021-08-12 18:48:57,708 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-08-12 18:48:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 434. [2021-08-12 18:48:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.203233256351039) internal successors, (1387), 433 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1387 transitions. [2021-08-12 18:48:57,757 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1387 transitions. Word has length 21 [2021-08-12 18:48:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:57,757 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1387 transitions. [2021-08-12 18:48:57,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1387 transitions. [2021-08-12 18:48:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:57,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:57,758 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:57,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-12 18:48:57,758 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1302841370, now seen corresponding path program 58 times [2021-08-12 18:48:57,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:57,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098045388] [2021-08-12 18:48:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:57,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:57,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098045388] [2021-08-12 18:48:57,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098045388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:57,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:57,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:57,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075205613] [2021-08-12 18:48:57,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:57,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:57,823 INFO L87 Difference]: Start difference. First operand 434 states and 1387 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:58,175 INFO L93 Difference]: Finished difference Result 823 states and 2500 transitions. [2021-08-12 18:48:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:58,178 INFO L225 Difference]: With dead ends: 823 [2021-08-12 18:48:58,178 INFO L226 Difference]: Without dead ends: 709 [2021-08-12 18:48:58,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-12 18:48:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 412. [2021-08-12 18:48:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.2092457420924574) internal successors, (1319), 411 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1319 transitions. [2021-08-12 18:48:58,228 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1319 transitions. Word has length 21 [2021-08-12 18:48:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:58,228 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1319 transitions. [2021-08-12 18:48:58,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1319 transitions. [2021-08-12 18:48:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:58,229 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:58,229 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:58,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-12 18:48:58,229 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -737228710, now seen corresponding path program 59 times [2021-08-12 18:48:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:58,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041642867] [2021-08-12 18:48:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:58,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:58,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041642867] [2021-08-12 18:48:58,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041642867] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:58,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:58,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:58,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141159319] [2021-08-12 18:48:58,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:58,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:58,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:58,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:58,296 INFO L87 Difference]: Start difference. First operand 412 states and 1319 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:58,724 INFO L93 Difference]: Finished difference Result 881 states and 2649 transitions. [2021-08-12 18:48:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:58,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:58,727 INFO L225 Difference]: With dead ends: 881 [2021-08-12 18:48:58,728 INFO L226 Difference]: Without dead ends: 787 [2021-08-12 18:48:58,728 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-08-12 18:48:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 426. [2021-08-12 18:48:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1905882352941175) internal successors, (1356), 425 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1356 transitions. [2021-08-12 18:48:58,787 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1356 transitions. Word has length 21 [2021-08-12 18:48:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:58,787 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1356 transitions. [2021-08-12 18:48:58,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1356 transitions. [2021-08-12 18:48:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:58,789 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:58,789 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:58,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-12 18:48:58,789 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:58,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1065611592, now seen corresponding path program 60 times [2021-08-12 18:48:58,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:58,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449639179] [2021-08-12 18:48:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:58,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:58,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449639179] [2021-08-12 18:48:58,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449639179] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:58,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:58,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:58,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690338641] [2021-08-12 18:48:58,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:58,864 INFO L87 Difference]: Start difference. First operand 426 states and 1356 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:59,203 INFO L93 Difference]: Finished difference Result 815 states and 2469 transitions. [2021-08-12 18:48:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:59,207 INFO L225 Difference]: With dead ends: 815 [2021-08-12 18:48:59,207 INFO L226 Difference]: Without dead ends: 690 [2021-08-12 18:48:59,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-08-12 18:48:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 393. [2021-08-12 18:48:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2448979591836733) internal successors, (1272), 392 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1272 transitions. [2021-08-12 18:48:59,259 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1272 transitions. Word has length 21 [2021-08-12 18:48:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:59,259 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1272 transitions. [2021-08-12 18:48:59,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1272 transitions. [2021-08-12 18:48:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:59,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:59,260 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:59,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-12 18:48:59,260 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash 910773180, now seen corresponding path program 61 times [2021-08-12 18:48:59,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:59,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823320804] [2021-08-12 18:48:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:59,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823320804] [2021-08-12 18:48:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823320804] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:59,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:59,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096947131] [2021-08-12 18:48:59,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:59,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:59,335 INFO L87 Difference]: Start difference. First operand 393 states and 1272 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:48:59,712 INFO L93 Difference]: Finished difference Result 826 states and 2486 transitions. [2021-08-12 18:48:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:48:59,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:48:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:48:59,715 INFO L225 Difference]: With dead ends: 826 [2021-08-12 18:48:59,716 INFO L226 Difference]: Without dead ends: 746 [2021-08-12 18:48:59,716 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:48:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-08-12 18:48:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 417. [2021-08-12 18:48:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.25) internal successors, (1352), 416 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1352 transitions. [2021-08-12 18:48:59,771 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1352 transitions. Word has length 21 [2021-08-12 18:48:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:48:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1352 transitions. [2021-08-12 18:48:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:48:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1352 transitions. [2021-08-12 18:48:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:48:59,772 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:48:59,772 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:48:59,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-12 18:48:59,772 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:48:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:48:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 582390298, now seen corresponding path program 62 times [2021-08-12 18:48:59,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:48:59,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137481433] [2021-08-12 18:48:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:48:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:48:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:48:59,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:48:59,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137481433] [2021-08-12 18:48:59,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137481433] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:48:59,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:48:59,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:48:59,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596785945] [2021-08-12 18:48:59,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:48:59,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:48:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:48:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:48:59,846 INFO L87 Difference]: Start difference. First operand 417 states and 1352 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:00,299 INFO L93 Difference]: Finished difference Result 857 states and 2573 transitions. [2021-08-12 18:49:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:00,303 INFO L225 Difference]: With dead ends: 857 [2021-08-12 18:49:00,303 INFO L226 Difference]: Without dead ends: 730 [2021-08-12 18:49:00,303 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-12 18:49:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 401. [2021-08-12 18:49:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.24) internal successors, (1296), 400 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1296 transitions. [2021-08-12 18:49:00,361 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1296 transitions. Word has length 21 [2021-08-12 18:49:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:00,361 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1296 transitions. [2021-08-12 18:49:00,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1296 transitions. [2021-08-12 18:49:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:00,362 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:00,362 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:00,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-12 18:49:00,362 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2103239612, now seen corresponding path program 63 times [2021-08-12 18:49:00,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:00,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476205845] [2021-08-12 18:49:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:00,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:00,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476205845] [2021-08-12 18:49:00,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476205845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:00,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:00,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:00,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250532505] [2021-08-12 18:49:00,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:00,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:00,421 INFO L87 Difference]: Start difference. First operand 401 states and 1296 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:00,826 INFO L93 Difference]: Finished difference Result 830 states and 2490 transitions. [2021-08-12 18:49:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:00,830 INFO L225 Difference]: With dead ends: 830 [2021-08-12 18:49:00,830 INFO L226 Difference]: Without dead ends: 750 [2021-08-12 18:49:00,830 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-12 18:49:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 409. [2021-08-12 18:49:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.2254901960784315) internal successors, (1316), 408 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1316 transitions. [2021-08-12 18:49:00,881 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1316 transitions. Word has length 21 [2021-08-12 18:49:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:00,881 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1316 transitions. [2021-08-12 18:49:00,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1316 transitions. [2021-08-12 18:49:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:00,882 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:00,882 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:00,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-12 18:49:00,882 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1049070524, now seen corresponding path program 64 times [2021-08-12 18:49:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:00,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364879971] [2021-08-12 18:49:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:00,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:00,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364879971] [2021-08-12 18:49:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364879971] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:00,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:00,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809586068] [2021-08-12 18:49:00,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:00,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:00,955 INFO L87 Difference]: Start difference. First operand 409 states and 1316 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:01,325 INFO L93 Difference]: Finished difference Result 778 states and 2361 transitions. [2021-08-12 18:49:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:01,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:01,329 INFO L225 Difference]: With dead ends: 778 [2021-08-12 18:49:01,329 INFO L226 Difference]: Without dead ends: 678 [2021-08-12 18:49:01,329 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-12 18:49:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 401. [2021-08-12 18:49:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.23) internal successors, (1292), 400 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1292 transitions. [2021-08-12 18:49:01,380 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1292 transitions. Word has length 21 [2021-08-12 18:49:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:01,380 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1292 transitions. [2021-08-12 18:49:01,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1292 transitions. [2021-08-12 18:49:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:01,381 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:01,381 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:01,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-12 18:49:01,381 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1868918118, now seen corresponding path program 65 times [2021-08-12 18:49:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:01,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978291616] [2021-08-12 18:49:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:01,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:01,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978291616] [2021-08-12 18:49:01,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978291616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:01,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:01,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150532008] [2021-08-12 18:49:01,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:01,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:01,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:01,450 INFO L87 Difference]: Start difference. First operand 401 states and 1292 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:01,874 INFO L93 Difference]: Finished difference Result 806 states and 2410 transitions. [2021-08-12 18:49:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:01,878 INFO L225 Difference]: With dead ends: 806 [2021-08-12 18:49:01,878 INFO L226 Difference]: Without dead ends: 695 [2021-08-12 18:49:01,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-08-12 18:49:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 423. [2021-08-12 18:49:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.1966824644549763) internal successors, (1349), 422 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1349 transitions. [2021-08-12 18:49:01,930 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1349 transitions. Word has length 21 [2021-08-12 18:49:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:01,930 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1349 transitions. [2021-08-12 18:49:01,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1349 transitions. [2021-08-12 18:49:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:01,931 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:01,931 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:01,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-12 18:49:01,931 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash 857120636, now seen corresponding path program 66 times [2021-08-12 18:49:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:01,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457772795] [2021-08-12 18:49:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:01,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:01,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457772795] [2021-08-12 18:49:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457772795] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:01,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:01,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:01,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101661715] [2021-08-12 18:49:01,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:01,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:01,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:01,997 INFO L87 Difference]: Start difference. First operand 423 states and 1349 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:02,454 INFO L93 Difference]: Finished difference Result 723 states and 2172 transitions. [2021-08-12 18:49:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:02,459 INFO L225 Difference]: With dead ends: 723 [2021-08-12 18:49:02,459 INFO L226 Difference]: Without dead ends: 601 [2021-08-12 18:49:02,460 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-12 18:49:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 393. [2021-08-12 18:49:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2346938775510203) internal successors, (1268), 392 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1268 transitions. [2021-08-12 18:49:02,547 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1268 transitions. Word has length 21 [2021-08-12 18:49:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:02,547 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1268 transitions. [2021-08-12 18:49:02,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1268 transitions. [2021-08-12 18:49:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:02,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:02,550 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:02,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-12 18:49:02,550 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1893120794, now seen corresponding path program 67 times [2021-08-12 18:49:02,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:02,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204264792] [2021-08-12 18:49:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:02,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:02,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204264792] [2021-08-12 18:49:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204264792] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:02,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:02,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253930953] [2021-08-12 18:49:02,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:02,627 INFO L87 Difference]: Start difference. First operand 393 states and 1268 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:03,039 INFO L93 Difference]: Finished difference Result 789 states and 2360 transitions. [2021-08-12 18:49:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:03,042 INFO L225 Difference]: With dead ends: 789 [2021-08-12 18:49:03,043 INFO L226 Difference]: Without dead ends: 709 [2021-08-12 18:49:03,043 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-12 18:49:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 405. [2021-08-12 18:49:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.227722772277228) internal successors, (1304), 404 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1304 transitions. [2021-08-12 18:49:03,095 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1304 transitions. Word has length 21 [2021-08-12 18:49:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:03,095 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1304 transitions. [2021-08-12 18:49:03,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1304 transitions. [2021-08-12 18:49:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:03,096 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:03,096 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:03,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-12 18:49:03,096 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash 401625882, now seen corresponding path program 68 times [2021-08-12 18:49:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:03,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282010634] [2021-08-12 18:49:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:03,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:03,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282010634] [2021-08-12 18:49:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282010634] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:03,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:03,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717474363] [2021-08-12 18:49:03,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:03,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:03,174 INFO L87 Difference]: Start difference. First operand 405 states and 1304 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:03,663 INFO L93 Difference]: Finished difference Result 803 states and 2397 transitions. [2021-08-12 18:49:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:03,667 INFO L225 Difference]: With dead ends: 803 [2021-08-12 18:49:03,667 INFO L226 Difference]: Without dead ends: 701 [2021-08-12 18:49:03,668 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-12 18:49:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 397. [2021-08-12 18:49:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.2323232323232323) internal successors, (1280), 396 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1280 transitions. [2021-08-12 18:49:03,745 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1280 transitions. Word has length 21 [2021-08-12 18:49:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:03,745 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1280 transitions. [2021-08-12 18:49:03,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1280 transitions. [2021-08-12 18:49:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:03,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:03,746 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:03,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-12 18:49:03,746 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1320783876, now seen corresponding path program 69 times [2021-08-12 18:49:03,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:03,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047745847] [2021-08-12 18:49:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:03,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:03,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047745847] [2021-08-12 18:49:03,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047745847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:03,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:03,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:03,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193443300] [2021-08-12 18:49:03,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:03,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:03,811 INFO L87 Difference]: Start difference. First operand 397 states and 1280 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:04,213 INFO L93 Difference]: Finished difference Result 801 states and 2396 transitions. [2021-08-12 18:49:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:04,217 INFO L225 Difference]: With dead ends: 801 [2021-08-12 18:49:04,217 INFO L226 Difference]: Without dead ends: 721 [2021-08-12 18:49:04,217 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-12 18:49:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 405. [2021-08-12 18:49:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.217821782178218) internal successors, (1300), 404 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1300 transitions. [2021-08-12 18:49:04,271 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1300 transitions. Word has length 21 [2021-08-12 18:49:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:04,271 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1300 transitions. [2021-08-12 18:49:04,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1300 transitions. [2021-08-12 18:49:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:04,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:04,272 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-12 18:49:04,272 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash 202273562, now seen corresponding path program 70 times [2021-08-12 18:49:04,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:04,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697533830] [2021-08-12 18:49:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:04,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697533830] [2021-08-12 18:49:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697533830] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351494279] [2021-08-12 18:49:04,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:04,338 INFO L87 Difference]: Start difference. First operand 405 states and 1300 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:04,718 INFO L93 Difference]: Finished difference Result 749 states and 2267 transitions. [2021-08-12 18:49:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:04,721 INFO L225 Difference]: With dead ends: 749 [2021-08-12 18:49:04,722 INFO L226 Difference]: Without dead ends: 649 [2021-08-12 18:49:04,722 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-08-12 18:49:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 397. [2021-08-12 18:49:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.2222222222222223) internal successors, (1276), 396 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1276 transitions. [2021-08-12 18:49:04,776 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1276 transitions. Word has length 21 [2021-08-12 18:49:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:04,776 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1276 transitions. [2021-08-12 18:49:04,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1276 transitions. [2021-08-12 18:49:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:04,777 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:04,777 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:04,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-12 18:49:04,777 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 957414170, now seen corresponding path program 71 times [2021-08-12 18:49:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:04,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185901366] [2021-08-12 18:49:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:04,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:04,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185901366] [2021-08-12 18:49:04,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185901366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:04,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:04,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:04,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403567631] [2021-08-12 18:49:04,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:04,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:04,847 INFO L87 Difference]: Start difference. First operand 397 states and 1276 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:05,269 INFO L93 Difference]: Finished difference Result 777 states and 2316 transitions. [2021-08-12 18:49:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:05,272 INFO L225 Difference]: With dead ends: 777 [2021-08-12 18:49:05,273 INFO L226 Difference]: Without dead ends: 683 [2021-08-12 18:49:05,273 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-12 18:49:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 411. [2021-08-12 18:49:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.202439024390244) internal successors, (1313), 410 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1313 transitions. [2021-08-12 18:49:05,328 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1313 transitions. Word has length 21 [2021-08-12 18:49:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:05,328 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1313 transitions. [2021-08-12 18:49:05,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1313 transitions. [2021-08-12 18:49:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:05,329 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:05,329 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:05,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-12 18:49:05,329 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -632520580, now seen corresponding path program 72 times [2021-08-12 18:49:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:05,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886301148] [2021-08-12 18:49:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:05,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886301148] [2021-08-12 18:49:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886301148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534473351] [2021-08-12 18:49:05,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:05,402 INFO L87 Difference]: Start difference. First operand 411 states and 1313 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:05,771 INFO L93 Difference]: Finished difference Result 711 states and 2136 transitions. [2021-08-12 18:49:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:05,775 INFO L225 Difference]: With dead ends: 711 [2021-08-12 18:49:05,775 INFO L226 Difference]: Without dead ends: 593 [2021-08-12 18:49:05,775 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-12 18:49:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 385. [2021-08-12 18:49:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2604166666666665) internal successors, (1252), 384 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1252 transitions. [2021-08-12 18:49:05,828 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1252 transitions. Word has length 21 [2021-08-12 18:49:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:05,828 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1252 transitions. [2021-08-12 18:49:05,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1252 transitions. [2021-08-12 18:49:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:05,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:05,829 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:05,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-12 18:49:05,829 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1845007066, now seen corresponding path program 73 times [2021-08-12 18:49:05,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:05,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917386131] [2021-08-12 18:49:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:05,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:05,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917386131] [2021-08-12 18:49:05,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917386131] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:05,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:05,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:05,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315660827] [2021-08-12 18:49:05,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:05,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:05,898 INFO L87 Difference]: Start difference. First operand 385 states and 1252 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:06,309 INFO L93 Difference]: Finished difference Result 761 states and 2276 transitions. [2021-08-12 18:49:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:06,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:06,313 INFO L225 Difference]: With dead ends: 761 [2021-08-12 18:49:06,313 INFO L226 Difference]: Without dead ends: 673 [2021-08-12 18:49:06,314 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-08-12 18:49:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 393. [2021-08-12 18:49:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2448979591836733) internal successors, (1272), 392 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1272 transitions. [2021-08-12 18:49:06,374 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1272 transitions. Word has length 21 [2021-08-12 18:49:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:06,374 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1272 transitions. [2021-08-12 18:49:06,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1272 transitions. [2021-08-12 18:49:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:06,375 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:06,375 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:06,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-12 18:49:06,375 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2093116196, now seen corresponding path program 74 times [2021-08-12 18:49:06,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:06,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241028780] [2021-08-12 18:49:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241028780] [2021-08-12 18:49:06,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241028780] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:06,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:06,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:06,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293344198] [2021-08-12 18:49:06,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:06,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:06,467 INFO L87 Difference]: Start difference. First operand 393 states and 1272 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:06,890 INFO L93 Difference]: Finished difference Result 753 states and 2240 transitions. [2021-08-12 18:49:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:06,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:06,894 INFO L225 Difference]: With dead ends: 753 [2021-08-12 18:49:06,894 INFO L226 Difference]: Without dead ends: 665 [2021-08-12 18:49:06,894 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-12 18:49:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 385. [2021-08-12 18:49:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.25) internal successors, (1248), 384 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1248 transitions. [2021-08-12 18:49:06,977 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1248 transitions. Word has length 21 [2021-08-12 18:49:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:06,977 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1248 transitions. [2021-08-12 18:49:06,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1248 transitions. [2021-08-12 18:49:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:06,978 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:06,978 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:06,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-12 18:49:06,978 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -198329928, now seen corresponding path program 75 times [2021-08-12 18:49:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651524135] [2021-08-12 18:49:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:07,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:07,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651524135] [2021-08-12 18:49:07,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651524135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:07,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:07,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:07,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140923535] [2021-08-12 18:49:07,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:07,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:07,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:07,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:07,056 INFO L87 Difference]: Start difference. First operand 385 states and 1248 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:07,504 INFO L93 Difference]: Finished difference Result 804 states and 2411 transitions. [2021-08-12 18:49:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:07,508 INFO L225 Difference]: With dead ends: 804 [2021-08-12 18:49:07,508 INFO L226 Difference]: Without dead ends: 716 [2021-08-12 18:49:07,509 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-12 18:49:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 405. [2021-08-12 18:49:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.237623762376238) internal successors, (1308), 404 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1308 transitions. [2021-08-12 18:49:07,565 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1308 transitions. Word has length 21 [2021-08-12 18:49:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:07,565 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1308 transitions. [2021-08-12 18:49:07,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1308 transitions. [2021-08-12 18:49:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:07,566 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:07,566 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:07,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-08-12 18:49:07,566 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:07,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1057334118, now seen corresponding path program 76 times [2021-08-12 18:49:07,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:07,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742175840] [2021-08-12 18:49:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:07,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742175840] [2021-08-12 18:49:07,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742175840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:07,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:07,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709686605] [2021-08-12 18:49:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:07,654 INFO L87 Difference]: Start difference. First operand 405 states and 1308 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:08,108 INFO L93 Difference]: Finished difference Result 827 states and 2466 transitions. [2021-08-12 18:49:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:08,111 INFO L225 Difference]: With dead ends: 827 [2021-08-12 18:49:08,112 INFO L226 Difference]: Without dead ends: 696 [2021-08-12 18:49:08,112 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-08-12 18:49:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 385. [2021-08-12 18:49:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2291666666666665) internal successors, (1240), 384 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1240 transitions. [2021-08-12 18:49:08,197 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1240 transitions. Word has length 21 [2021-08-12 18:49:08,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:08,197 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1240 transitions. [2021-08-12 18:49:08,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1240 transitions. [2021-08-12 18:49:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:08,198 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:08,198 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:08,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-12 18:49:08,199 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:08,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1739976706, now seen corresponding path program 77 times [2021-08-12 18:49:08,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:08,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57414949] [2021-08-12 18:49:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:08,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57414949] [2021-08-12 18:49:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57414949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:08,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:08,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110587951] [2021-08-12 18:49:08,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:08,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:08,279 INFO L87 Difference]: Start difference. First operand 385 states and 1240 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:08,900 INFO L93 Difference]: Finished difference Result 784 states and 2331 transitions. [2021-08-12 18:49:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:08,906 INFO L225 Difference]: With dead ends: 784 [2021-08-12 18:49:08,906 INFO L226 Difference]: Without dead ends: 704 [2021-08-12 18:49:08,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-12 18:49:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 401. [2021-08-12 18:49:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.22) internal successors, (1288), 400 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1288 transitions. [2021-08-12 18:49:08,987 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1288 transitions. Word has length 21 [2021-08-12 18:49:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:08,987 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1288 transitions. [2021-08-12 18:49:08,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1288 transitions. [2021-08-12 18:49:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:08,988 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:08,988 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:08,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-12 18:49:08,988 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash 150041956, now seen corresponding path program 78 times [2021-08-12 18:49:08,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:08,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442115816] [2021-08-12 18:49:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:09,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442115816] [2021-08-12 18:49:09,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442115816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:09,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:09,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:09,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056942698] [2021-08-12 18:49:09,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:09,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:09,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:09,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:09,070 INFO L87 Difference]: Start difference. First operand 401 states and 1288 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:09,621 INFO L93 Difference]: Finished difference Result 815 states and 2418 transitions. [2021-08-12 18:49:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:09,625 INFO L225 Difference]: With dead ends: 815 [2021-08-12 18:49:09,625 INFO L226 Difference]: Without dead ends: 680 [2021-08-12 18:49:09,625 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-12 18:49:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 377. [2021-08-12 18:49:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.234042553191489) internal successors, (1216), 376 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1216 transitions. [2021-08-12 18:49:09,682 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1216 transitions. Word has length 21 [2021-08-12 18:49:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:09,682 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1216 transitions. [2021-08-12 18:49:09,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1216 transitions. [2021-08-12 18:49:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:09,683 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:09,683 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-12 18:49:09,683 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1048980186, now seen corresponding path program 79 times [2021-08-12 18:49:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:09,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014613262] [2021-08-12 18:49:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:09,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014613262] [2021-08-12 18:49:09,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014613262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:09,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:09,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603827909] [2021-08-12 18:49:09,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:09,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:09,762 INFO L87 Difference]: Start difference. First operand 377 states and 1216 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:10,234 INFO L93 Difference]: Finished difference Result 797 states and 2388 transitions. [2021-08-12 18:49:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:10,239 INFO L225 Difference]: With dead ends: 797 [2021-08-12 18:49:10,239 INFO L226 Difference]: Without dead ends: 709 [2021-08-12 18:49:10,239 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-12 18:49:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 389. [2021-08-12 18:49:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.2268041237113403) internal successors, (1252), 388 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1252 transitions. [2021-08-12 18:49:10,298 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1252 transitions. Word has length 21 [2021-08-12 18:49:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:10,298 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1252 transitions. [2021-08-12 18:49:10,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1252 transitions. [2021-08-12 18:49:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:10,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:10,299 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:10,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-12 18:49:10,299 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1297089316, now seen corresponding path program 80 times [2021-08-12 18:49:10,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:10,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104806478] [2021-08-12 18:49:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:10,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:10,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104806478] [2021-08-12 18:49:10,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104806478] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:10,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:10,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861358979] [2021-08-12 18:49:10,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:10,361 INFO L87 Difference]: Start difference. First operand 389 states and 1252 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:10,822 INFO L93 Difference]: Finished difference Result 789 states and 2352 transitions. [2021-08-12 18:49:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:10,826 INFO L225 Difference]: With dead ends: 789 [2021-08-12 18:49:10,826 INFO L226 Difference]: Without dead ends: 701 [2021-08-12 18:49:10,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-12 18:49:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 381. [2021-08-12 18:49:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.231578947368421) internal successors, (1228), 380 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1228 transitions. [2021-08-12 18:49:10,890 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1228 transitions. Word has length 21 [2021-08-12 18:49:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:10,890 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1228 transitions. [2021-08-12 18:49:10,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1228 transitions. [2021-08-12 18:49:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:10,891 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:10,891 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:10,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-12 18:49:10,891 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1604768474, now seen corresponding path program 81 times [2021-08-12 18:49:10,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:10,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752367583] [2021-08-12 18:49:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:10,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752367583] [2021-08-12 18:49:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752367583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:10,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:10,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:10,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744324647] [2021-08-12 18:49:10,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:10,956 INFO L87 Difference]: Start difference. First operand 381 states and 1228 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:11,436 INFO L93 Difference]: Finished difference Result 789 states and 2364 transitions. [2021-08-12 18:49:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:11,442 INFO L225 Difference]: With dead ends: 789 [2021-08-12 18:49:11,442 INFO L226 Difference]: Without dead ends: 701 [2021-08-12 18:49:11,443 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-12 18:49:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 393. [2021-08-12 18:49:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2142857142857144) internal successors, (1260), 392 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1260 transitions. [2021-08-12 18:49:11,506 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1260 transitions. Word has length 21 [2021-08-12 18:49:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1260 transitions. [2021-08-12 18:49:11,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1260 transitions. [2021-08-12 18:49:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:11,507 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:11,507 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:11,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-12 18:49:11,508 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:11,508 INFO L82 PathProgramCache]: Analyzing trace with hash -569482052, now seen corresponding path program 82 times [2021-08-12 18:49:11,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:11,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107401698] [2021-08-12 18:49:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:11,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:11,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107401698] [2021-08-12 18:49:11,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107401698] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:11,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:11,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:11,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576847665] [2021-08-12 18:49:11,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:11,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:11,574 INFO L87 Difference]: Start difference. First operand 393 states and 1260 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:12,048 INFO L93 Difference]: Finished difference Result 729 states and 2203 transitions. [2021-08-12 18:49:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:12,052 INFO L225 Difference]: With dead ends: 729 [2021-08-12 18:49:12,052 INFO L226 Difference]: Without dead ends: 625 [2021-08-12 18:49:12,052 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-12 18:49:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 381. [2021-08-12 18:49:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.221052631578947) internal successors, (1224), 380 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1224 transitions. [2021-08-12 18:49:12,111 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1224 transitions. Word has length 21 [2021-08-12 18:49:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:12,112 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1224 transitions. [2021-08-12 18:49:12,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1224 transitions. [2021-08-12 18:49:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:12,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:12,112 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:12,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-12 18:49:12,113 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash -751892188, now seen corresponding path program 83 times [2021-08-12 18:49:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:12,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774308567] [2021-08-12 18:49:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:12,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:12,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774308567] [2021-08-12 18:49:12,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774308567] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:12,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:12,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:12,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598797137] [2021-08-12 18:49:12,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:12,175 INFO L87 Difference]: Start difference. First operand 381 states and 1224 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:12,667 INFO L93 Difference]: Finished difference Result 777 states and 2316 transitions. [2021-08-12 18:49:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:12,671 INFO L225 Difference]: With dead ends: 777 [2021-08-12 18:49:12,671 INFO L226 Difference]: Without dead ends: 697 [2021-08-12 18:49:12,672 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-08-12 18:49:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 389. [2021-08-12 18:49:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.2061855670103094) internal successors, (1244), 388 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1244 transitions. [2021-08-12 18:49:12,731 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1244 transitions. Word has length 21 [2021-08-12 18:49:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:12,731 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1244 transitions. [2021-08-12 18:49:12,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1244 transitions. [2021-08-12 18:49:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:12,732 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:12,732 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:12,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-12 18:49:12,732 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1995152774, now seen corresponding path program 84 times [2021-08-12 18:49:12,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:12,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765518881] [2021-08-12 18:49:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:12,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:12,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765518881] [2021-08-12 18:49:12,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765518881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:12,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:12,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:12,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266243985] [2021-08-12 18:49:12,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:12,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:12,796 INFO L87 Difference]: Start difference. First operand 389 states and 1244 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:13,204 INFO L93 Difference]: Finished difference Result 725 states and 2187 transitions. [2021-08-12 18:49:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:13,208 INFO L225 Difference]: With dead ends: 725 [2021-08-12 18:49:13,208 INFO L226 Difference]: Without dead ends: 621 [2021-08-12 18:49:13,209 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-12 18:49:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 377. [2021-08-12 18:49:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.228723404255319) internal successors, (1214), 376 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1214 transitions. [2021-08-12 18:49:13,270 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1214 transitions. Word has length 21 [2021-08-12 18:49:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:13,270 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1214 transitions. [2021-08-12 18:49:13,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1214 transitions. [2021-08-12 18:49:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:13,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:13,271 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:13,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-12 18:49:13,271 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2031327800, now seen corresponding path program 85 times [2021-08-12 18:49:13,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:13,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698822506] [2021-08-12 18:49:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:13,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:13,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698822506] [2021-08-12 18:49:13,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698822506] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:13,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:13,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:13,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207288021] [2021-08-12 18:49:13,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:13,347 INFO L87 Difference]: Start difference. First operand 377 states and 1214 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:13,837 INFO L93 Difference]: Finished difference Result 792 states and 2361 transitions. [2021-08-12 18:49:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:13,841 INFO L225 Difference]: With dead ends: 792 [2021-08-12 18:49:13,841 INFO L226 Difference]: Without dead ends: 704 [2021-08-12 18:49:13,841 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-12 18:49:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 377. [2021-08-12 18:49:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.1968085106382977) internal successors, (1202), 376 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1202 transitions. [2021-08-12 18:49:13,901 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1202 transitions. Word has length 21 [2021-08-12 18:49:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:13,901 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1202 transitions. [2021-08-12 18:49:13,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1202 transitions. [2021-08-12 18:49:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:13,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:13,902 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:13,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-12 18:49:13,902 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1172323610, now seen corresponding path program 86 times [2021-08-12 18:49:13,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:13,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486101108] [2021-08-12 18:49:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:13,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:13,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486101108] [2021-08-12 18:49:13,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486101108] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:13,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:13,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:13,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472152063] [2021-08-12 18:49:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:13,999 INFO L87 Difference]: Start difference. First operand 377 states and 1202 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:14,492 INFO L93 Difference]: Finished difference Result 815 states and 2416 transitions. [2021-08-12 18:49:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:14,496 INFO L225 Difference]: With dead ends: 815 [2021-08-12 18:49:14,496 INFO L226 Difference]: Without dead ends: 684 [2021-08-12 18:49:14,497 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-12 18:49:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 357. [2021-08-12 18:49:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1797752808988764) internal successors, (1132), 356 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1132 transitions. [2021-08-12 18:49:14,556 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1132 transitions. Word has length 21 [2021-08-12 18:49:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:14,556 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1132 transitions. [2021-08-12 18:49:14,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1132 transitions. [2021-08-12 18:49:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:14,557 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:14,557 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:14,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-12 18:49:14,557 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1824519834, now seen corresponding path program 87 times [2021-08-12 18:49:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:14,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396471052] [2021-08-12 18:49:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:14,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:14,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396471052] [2021-08-12 18:49:14,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396471052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:14,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:14,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:14,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831908367] [2021-08-12 18:49:14,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:14,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:14,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:14,620 INFO L87 Difference]: Start difference. First operand 357 states and 1132 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:15,100 INFO L93 Difference]: Finished difference Result 741 states and 2192 transitions. [2021-08-12 18:49:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:15,105 INFO L225 Difference]: With dead ends: 741 [2021-08-12 18:49:15,105 INFO L226 Difference]: Without dead ends: 653 [2021-08-12 18:49:15,105 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-08-12 18:49:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 369. [2021-08-12 18:49:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.1630434782608696) internal successors, (1164), 368 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1164 transitions. [2021-08-12 18:49:15,175 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1164 transitions. Word has length 21 [2021-08-12 18:49:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:15,175 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1164 transitions. [2021-08-12 18:49:15,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1164 transitions. [2021-08-12 18:49:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:15,176 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:15,176 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:15,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-12 18:49:15,176 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1416279014, now seen corresponding path program 88 times [2021-08-12 18:49:15,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:15,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134145012] [2021-08-12 18:49:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:15,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:15,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134145012] [2021-08-12 18:49:15,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134145012] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:15,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:15,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:15,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248827897] [2021-08-12 18:49:15,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:15,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:15,234 INFO L87 Difference]: Start difference. First operand 369 states and 1164 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:15,670 INFO L93 Difference]: Finished difference Result 681 states and 2031 transitions. [2021-08-12 18:49:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:15,674 INFO L225 Difference]: With dead ends: 681 [2021-08-12 18:49:15,674 INFO L226 Difference]: Without dead ends: 577 [2021-08-12 18:49:15,675 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-12 18:49:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 357. [2021-08-12 18:49:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.162921348314607) internal successors, (1126), 356 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1126 transitions. [2021-08-12 18:49:15,734 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1126 transitions. Word has length 21 [2021-08-12 18:49:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:15,734 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1126 transitions. [2021-08-12 18:49:15,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1126 transitions. [2021-08-12 18:49:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:15,735 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:15,735 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:15,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-08-12 18:49:15,735 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash -928326020, now seen corresponding path program 89 times [2021-08-12 18:49:15,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:15,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266381035] [2021-08-12 18:49:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:15,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:15,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266381035] [2021-08-12 18:49:15,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266381035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:15,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:15,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:15,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398289249] [2021-08-12 18:49:15,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:15,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:15,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:15,802 INFO L87 Difference]: Start difference. First operand 357 states and 1126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:16,307 INFO L93 Difference]: Finished difference Result 774 states and 2288 transitions. [2021-08-12 18:49:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:16,311 INFO L225 Difference]: With dead ends: 774 [2021-08-12 18:49:16,311 INFO L226 Difference]: Without dead ends: 663 [2021-08-12 18:49:16,312 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-12 18:49:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 379. [2021-08-12 18:49:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1296296296296298) internal successors, (1183), 378 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1183 transitions. [2021-08-12 18:49:16,373 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1183 transitions. Word has length 21 [2021-08-12 18:49:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:16,373 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1183 transitions. [2021-08-12 18:49:16,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1183 transitions. [2021-08-12 18:49:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:16,373 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:16,373 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:16,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-08-12 18:49:16,374 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash -840389286, now seen corresponding path program 90 times [2021-08-12 18:49:16,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:16,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353945900] [2021-08-12 18:49:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:16,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:16,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353945900] [2021-08-12 18:49:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353945900] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:16,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990740734] [2021-08-12 18:49:16,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:16,447 INFO L87 Difference]: Start difference. First operand 379 states and 1183 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:16,882 INFO L93 Difference]: Finished difference Result 691 states and 2050 transitions. [2021-08-12 18:49:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:16,886 INFO L225 Difference]: With dead ends: 691 [2021-08-12 18:49:16,886 INFO L226 Difference]: Without dead ends: 567 [2021-08-12 18:49:16,887 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-12 18:49:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 347. [2021-08-12 18:49:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1705202312138727) internal successors, (1097), 346 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1097 transitions. [2021-08-12 18:49:16,948 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1097 transitions. Word has length 21 [2021-08-12 18:49:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:16,948 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1097 transitions. [2021-08-12 18:49:16,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1097 transitions. [2021-08-12 18:49:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:16,948 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:16,948 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:16,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-12 18:49:16,949 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash 456830594, now seen corresponding path program 91 times [2021-08-12 18:49:16,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:16,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792344523] [2021-08-12 18:49:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:17,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792344523] [2021-08-12 18:49:17,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792344523] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:17,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:17,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:17,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869985869] [2021-08-12 18:49:17,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:17,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:17,018 INFO L87 Difference]: Start difference. First operand 347 states and 1097 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:17,483 INFO L93 Difference]: Finished difference Result 687 states and 2001 transitions. [2021-08-12 18:49:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:17,488 INFO L225 Difference]: With dead ends: 687 [2021-08-12 18:49:17,488 INFO L226 Difference]: Without dead ends: 607 [2021-08-12 18:49:17,488 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-12 18:49:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 347. [2021-08-12 18:49:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.147398843930636) internal successors, (1089), 346 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1089 transitions. [2021-08-12 18:49:17,550 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1089 transitions. Word has length 21 [2021-08-12 18:49:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:17,550 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1089 transitions. [2021-08-12 18:49:17,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1089 transitions. [2021-08-12 18:49:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:17,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:17,550 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:17,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-12 18:49:17,551 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1133104156, now seen corresponding path program 92 times [2021-08-12 18:49:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:17,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168480824] [2021-08-12 18:49:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:17,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:17,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168480824] [2021-08-12 18:49:17,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168480824] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:17,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:17,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632423787] [2021-08-12 18:49:17,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:17,629 INFO L87 Difference]: Start difference. First operand 347 states and 1089 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:18,115 INFO L93 Difference]: Finished difference Result 718 states and 2088 transitions. [2021-08-12 18:49:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:18,119 INFO L225 Difference]: With dead ends: 718 [2021-08-12 18:49:18,119 INFO L226 Difference]: Without dead ends: 591 [2021-08-12 18:49:18,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-12 18:49:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 331. [2021-08-12 18:49:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.1303030303030304) internal successors, (1033), 330 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1033 transitions. [2021-08-12 18:49:18,180 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1033 transitions. Word has length 21 [2021-08-12 18:49:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:18,181 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1033 transitions. [2021-08-12 18:49:18,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1033 transitions. [2021-08-12 18:49:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:18,181 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:18,181 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:18,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-12 18:49:18,181 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash 250022628, now seen corresponding path program 93 times [2021-08-12 18:49:18,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:18,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879781197] [2021-08-12 18:49:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:18,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879781197] [2021-08-12 18:49:18,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879781197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:18,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:18,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:18,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120376242] [2021-08-12 18:49:18,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:18,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:18,248 INFO L87 Difference]: Start difference. First operand 331 states and 1033 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:18,754 INFO L93 Difference]: Finished difference Result 691 states and 2005 transitions. [2021-08-12 18:49:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:18,758 INFO L225 Difference]: With dead ends: 691 [2021-08-12 18:49:18,759 INFO L226 Difference]: Without dead ends: 611 [2021-08-12 18:49:18,759 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-08-12 18:49:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 339. [2021-08-12 18:49:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1153846153846154) internal successors, (1053), 338 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1053 transitions. [2021-08-12 18:49:18,821 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1053 transitions. Word has length 21 [2021-08-12 18:49:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:18,821 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1053 transitions. [2021-08-12 18:49:18,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1053 transitions. [2021-08-12 18:49:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:18,821 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:18,821 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:18,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-12 18:49:18,822 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1930519268, now seen corresponding path program 94 times [2021-08-12 18:49:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:18,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260834632] [2021-08-12 18:49:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:18,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:18,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260834632] [2021-08-12 18:49:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260834632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:18,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:18,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659058861] [2021-08-12 18:49:18,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:18,880 INFO L87 Difference]: Start difference. First operand 339 states and 1053 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:19,313 INFO L93 Difference]: Finished difference Result 639 states and 1876 transitions. [2021-08-12 18:49:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:19,317 INFO L225 Difference]: With dead ends: 639 [2021-08-12 18:49:19,317 INFO L226 Difference]: Without dead ends: 539 [2021-08-12 18:49:19,317 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-12 18:49:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 331. [2021-08-12 18:49:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.118181818181818) internal successors, (1029), 330 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1029 transitions. [2021-08-12 18:49:19,380 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1029 transitions. Word has length 21 [2021-08-12 18:49:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:19,380 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1029 transitions. [2021-08-12 18:49:19,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1029 transitions. [2021-08-12 18:49:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:19,380 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:19,380 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:19,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-12 18:49:19,381 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1667184582, now seen corresponding path program 95 times [2021-08-12 18:49:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:19,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147072047] [2021-08-12 18:49:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:19,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147072047] [2021-08-12 18:49:19,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147072047] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:19,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:19,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:19,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513654758] [2021-08-12 18:49:19,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:19,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:19,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:19,442 INFO L87 Difference]: Start difference. First operand 331 states and 1029 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:19,923 INFO L93 Difference]: Finished difference Result 667 states and 1925 transitions. [2021-08-12 18:49:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:19,927 INFO L225 Difference]: With dead ends: 667 [2021-08-12 18:49:19,927 INFO L226 Difference]: Without dead ends: 556 [2021-08-12 18:49:19,928 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-12 18:49:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 284. [2021-08-12 18:49:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0530035335689045) internal successors, (864), 283 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 864 transitions. [2021-08-12 18:49:19,981 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 864 transitions. Word has length 21 [2021-08-12 18:49:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:19,981 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 864 transitions. [2021-08-12 18:49:19,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 864 transitions. [2021-08-12 18:49:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:19,981 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:19,981 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:19,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-12 18:49:19,982 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 275040036, now seen corresponding path program 96 times [2021-08-12 18:49:19,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:19,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874139471] [2021-08-12 18:49:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:20,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:20,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874139471] [2021-08-12 18:49:20,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874139471] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:20,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:20,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773092232] [2021-08-12 18:49:20,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:20,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:20,041 INFO L87 Difference]: Start difference. First operand 284 states and 864 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:20,453 INFO L93 Difference]: Finished difference Result 584 states and 1687 transitions. [2021-08-12 18:49:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:20,457 INFO L225 Difference]: With dead ends: 584 [2021-08-12 18:49:20,457 INFO L226 Difference]: Without dead ends: 458 [2021-08-12 18:49:20,458 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-12 18:49:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 250. [2021-08-12 18:49:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.1204819277108435) internal successors, (777), 249 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 777 transitions. [2021-08-12 18:49:20,511 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 777 transitions. Word has length 21 [2021-08-12 18:49:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:20,512 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 777 transitions. [2021-08-12 18:49:20,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 777 transitions. [2021-08-12 18:49:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:20,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:20,513 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:20,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-12 18:49:20,513 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash 988259000, now seen corresponding path program 97 times [2021-08-12 18:49:20,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:20,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276689787] [2021-08-12 18:49:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:20,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:20,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276689787] [2021-08-12 18:49:20,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276689787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:20,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:20,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:20,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263670944] [2021-08-12 18:49:20,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:20,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:20,573 INFO L87 Difference]: Start difference. First operand 250 states and 777 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:20,974 INFO L93 Difference]: Finished difference Result 514 states and 1488 transitions. [2021-08-12 18:49:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:20,978 INFO L225 Difference]: With dead ends: 514 [2021-08-12 18:49:20,978 INFO L226 Difference]: Without dead ends: 426 [2021-08-12 18:49:20,979 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-12 18:49:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 258. [2021-08-12 18:49:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.1011673151750974) internal successors, (797), 257 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 797 transitions. [2021-08-12 18:49:21,033 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 797 transitions. Word has length 21 [2021-08-12 18:49:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:21,033 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 797 transitions. [2021-08-12 18:49:21,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 797 transitions. [2021-08-12 18:49:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:21,033 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:21,033 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:21,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-12 18:49:21,034 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1236368130, now seen corresponding path program 98 times [2021-08-12 18:49:21,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:21,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167886985] [2021-08-12 18:49:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:21,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:21,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167886985] [2021-08-12 18:49:21,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167886985] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:21,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:21,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534713] [2021-08-12 18:49:21,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:21,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:21,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:21,097 INFO L87 Difference]: Start difference. First operand 258 states and 797 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:21,495 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-08-12 18:49:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:21,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:21,499 INFO L225 Difference]: With dead ends: 506 [2021-08-12 18:49:21,499 INFO L226 Difference]: Without dead ends: 418 [2021-08-12 18:49:21,500 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-12 18:49:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 250. [2021-08-12 18:49:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.104417670682731) internal successors, (773), 249 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 773 transitions. [2021-08-12 18:49:21,554 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 773 transitions. Word has length 21 [2021-08-12 18:49:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:21,554 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 773 transitions. [2021-08-12 18:49:21,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 773 transitions. [2021-08-12 18:49:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:21,554 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:21,555 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:21,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-12 18:49:21,555 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2114241864, now seen corresponding path program 99 times [2021-08-12 18:49:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:21,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687429228] [2021-08-12 18:49:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:21,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687429228] [2021-08-12 18:49:21,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687429228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:21,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:21,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:21,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449176631] [2021-08-12 18:49:21,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:21,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:21,628 INFO L87 Difference]: Start difference. First operand 250 states and 773 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:22,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:22,038 INFO L93 Difference]: Finished difference Result 532 states and 1545 transitions. [2021-08-12 18:49:22,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:22,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:22,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:22,042 INFO L225 Difference]: With dead ends: 532 [2021-08-12 18:49:22,043 INFO L226 Difference]: Without dead ends: 444 [2021-08-12 18:49:22,043 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-12 18:49:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 262. [2021-08-12 18:49:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0842911877394634) internal successors, (805), 261 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 805 transitions. [2021-08-12 18:49:22,111 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 805 transitions. Word has length 21 [2021-08-12 18:49:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:22,112 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 805 transitions. [2021-08-12 18:49:22,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 805 transitions. [2021-08-12 18:49:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:22,113 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:22,113 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:22,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-12 18:49:22,113 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 664098074, now seen corresponding path program 100 times [2021-08-12 18:49:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:22,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997704313] [2021-08-12 18:49:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:22,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:22,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997704313] [2021-08-12 18:49:22,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997704313] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:22,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:22,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:22,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074775149] [2021-08-12 18:49:22,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:22,174 INFO L87 Difference]: Start difference. First operand 262 states and 805 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:22,596 INFO L93 Difference]: Finished difference Result 538 states and 1550 transitions. [2021-08-12 18:49:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:22,600 INFO L225 Difference]: With dead ends: 538 [2021-08-12 18:49:22,600 INFO L226 Difference]: Without dead ends: 432 [2021-08-12 18:49:22,600 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-12 18:49:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 250. [2021-08-12 18:49:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0883534136546187) internal successors, (769), 249 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) [2021-08-12 18:49:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 769 transitions. [2021-08-12 18:49:22,653 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 769 transitions. Word has length 21 [2021-08-12 18:49:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:22,654 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 769 transitions. [2021-08-12 18:49:22,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 769 transitions. [2021-08-12 18:49:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:22,654 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:22,654 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:22,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-12 18:49:22,654 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:22,654 INFO L82 PathProgramCache]: Analyzing trace with hash -175935230, now seen corresponding path program 101 times [2021-08-12 18:49:22,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:22,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903984164] [2021-08-12 18:49:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:22,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:22,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903984164] [2021-08-12 18:49:22,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903984164] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:22,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:22,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:22,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739628178] [2021-08-12 18:49:22,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:22,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:22,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:22,721 INFO L87 Difference]: Start difference. First operand 250 states and 769 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:23,118 INFO L93 Difference]: Finished difference Result 512 states and 1469 transitions. [2021-08-12 18:49:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:23,122 INFO L225 Difference]: With dead ends: 512 [2021-08-12 18:49:23,122 INFO L226 Difference]: Without dead ends: 432 [2021-08-12 18:49:23,122 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-12 18:49:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 258. [2021-08-12 18:49:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.0700389105058368) internal successors, (789), 257 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 789 transitions. [2021-08-12 18:49:23,175 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 789 transitions. Word has length 21 [2021-08-12 18:49:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:23,176 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 789 transitions. [2021-08-12 18:49:23,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 789 transitions. [2021-08-12 18:49:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:23,176 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:23,176 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:23,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-12 18:49:23,176 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1744863772, now seen corresponding path program 102 times [2021-08-12 18:49:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:23,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988808750] [2021-08-12 18:49:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:23,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:23,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988808750] [2021-08-12 18:49:23,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988808750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:23,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:23,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263701774] [2021-08-12 18:49:23,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:23,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:23,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:23,257 INFO L87 Difference]: Start difference. First operand 258 states and 789 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:23,684 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-08-12 18:49:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:23,688 INFO L225 Difference]: With dead ends: 526 [2021-08-12 18:49:23,688 INFO L226 Difference]: Without dead ends: 420 [2021-08-12 18:49:23,689 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-12 18:49:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 246. [2021-08-12 18:49:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.0979591836734692) internal successors, (759), 245 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 759 transitions. [2021-08-12 18:49:23,744 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 759 transitions. Word has length 21 [2021-08-12 18:49:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:23,744 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 759 transitions. [2021-08-12 18:49:23,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 759 transitions. [2021-08-12 18:49:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:23,744 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:23,744 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:23,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-12 18:49:23,744 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash 507356954, now seen corresponding path program 103 times [2021-08-12 18:49:23,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:23,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709762783] [2021-08-12 18:49:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709762783] [2021-08-12 18:49:23,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709762783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:23,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:23,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:23,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518257075] [2021-08-12 18:49:23,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:23,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:23,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:23,800 INFO L87 Difference]: Start difference. First operand 246 states and 759 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:24,211 INFO L93 Difference]: Finished difference Result 502 states and 1442 transitions. [2021-08-12 18:49:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:24,215 INFO L225 Difference]: With dead ends: 502 [2021-08-12 18:49:24,215 INFO L226 Difference]: Without dead ends: 414 [2021-08-12 18:49:24,216 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-12 18:49:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 246. [2021-08-12 18:49:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.0653061224489795) internal successors, (751), 245 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 751 transitions. [2021-08-12 18:49:24,271 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 751 transitions. Word has length 21 [2021-08-12 18:49:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:24,271 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 751 transitions. [2021-08-12 18:49:24,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 751 transitions. [2021-08-12 18:49:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:24,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:24,271 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:24,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-12 18:49:24,272 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:24,272 INFO L82 PathProgramCache]: Analyzing trace with hash 755466084, now seen corresponding path program 104 times [2021-08-12 18:49:24,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:24,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110745385] [2021-08-12 18:49:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:24,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110745385] [2021-08-12 18:49:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110745385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:24,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:24,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:24,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159415166] [2021-08-12 18:49:24,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:24,328 INFO L87 Difference]: Start difference. First operand 246 states and 751 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:24,736 INFO L93 Difference]: Finished difference Result 494 states and 1406 transitions. [2021-08-12 18:49:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:24,740 INFO L225 Difference]: With dead ends: 494 [2021-08-12 18:49:24,740 INFO L226 Difference]: Without dead ends: 406 [2021-08-12 18:49:24,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-12 18:49:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 238. [2021-08-12 18:49:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.067510548523207) internal successors, (727), 237 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 727 transitions. [2021-08-12 18:49:24,795 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 727 transitions. Word has length 21 [2021-08-12 18:49:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:24,795 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 727 transitions. [2021-08-12 18:49:24,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 727 transitions. [2021-08-12 18:49:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:24,796 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:24,796 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-12 18:49:24,796 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -418293064, now seen corresponding path program 105 times [2021-08-12 18:49:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:24,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683010719] [2021-08-12 18:49:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:24,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683010719] [2021-08-12 18:49:24,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683010719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:24,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:24,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:24,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385450845] [2021-08-12 18:49:24,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:24,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:24,870 INFO L87 Difference]: Start difference. First operand 238 states and 727 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:25,290 INFO L93 Difference]: Finished difference Result 494 states and 1418 transitions. [2021-08-12 18:49:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:25,294 INFO L225 Difference]: With dead ends: 494 [2021-08-12 18:49:25,294 INFO L226 Difference]: Without dead ends: 406 [2021-08-12 18:49:25,294 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-12 18:49:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 250. [2021-08-12 18:49:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0481927710843375) internal successors, (759), 249 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 759 transitions. [2021-08-12 18:49:25,349 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 759 transitions. Word has length 21 [2021-08-12 18:49:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:25,349 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 759 transitions. [2021-08-12 18:49:25,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 759 transitions. [2021-08-12 18:49:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:25,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:25,350 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:25,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-12 18:49:25,350 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1702423706, now seen corresponding path program 106 times [2021-08-12 18:49:25,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:25,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370820790] [2021-08-12 18:49:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:25,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370820790] [2021-08-12 18:49:25,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370820790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:25,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:25,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:25,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738680989] [2021-08-12 18:49:25,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:25,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:25,430 INFO L87 Difference]: Start difference. First operand 250 states and 759 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:25,777 INFO L93 Difference]: Finished difference Result 434 states and 1257 transitions. [2021-08-12 18:49:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:25,781 INFO L225 Difference]: With dead ends: 434 [2021-08-12 18:49:25,781 INFO L226 Difference]: Without dead ends: 330 [2021-08-12 18:49:25,782 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-12 18:49:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 238. [2021-08-12 18:49:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.050632911392405) internal successors, (723), 237 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 723 transitions. [2021-08-12 18:49:25,847 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 723 transitions. Word has length 21 [2021-08-12 18:49:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:25,847 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 723 transitions. [2021-08-12 18:49:25,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 723 transitions. [2021-08-12 18:49:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:25,848 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:25,848 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:25,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-12 18:49:25,848 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1520013570, now seen corresponding path program 107 times [2021-08-12 18:49:25,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:25,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813725410] [2021-08-12 18:49:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:25,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:25,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813725410] [2021-08-12 18:49:25,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813725410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:25,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:25,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261012939] [2021-08-12 18:49:25,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:25,913 INFO L87 Difference]: Start difference. First operand 238 states and 723 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:26,315 INFO L93 Difference]: Finished difference Result 482 states and 1370 transitions. [2021-08-12 18:49:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:26,321 INFO L225 Difference]: With dead ends: 482 [2021-08-12 18:49:26,321 INFO L226 Difference]: Without dead ends: 402 [2021-08-12 18:49:26,321 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-12 18:49:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 246. [2021-08-12 18:49:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.0326530612244897) internal successors, (743), 245 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 743 transitions. [2021-08-12 18:49:26,377 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 743 transitions. Word has length 21 [2021-08-12 18:49:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:26,377 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 743 transitions. [2021-08-12 18:49:26,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 743 transitions. [2021-08-12 18:49:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:26,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:26,377 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:26,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-12 18:49:26,378 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -27908764, now seen corresponding path program 108 times [2021-08-12 18:49:26,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:26,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225342094] [2021-08-12 18:49:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225342094] [2021-08-12 18:49:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225342094] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:26,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:26,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:26,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199387096] [2021-08-12 18:49:26,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:26,444 INFO L87 Difference]: Start difference. First operand 246 states and 743 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:26,821 INFO L93 Difference]: Finished difference Result 430 states and 1241 transitions. [2021-08-12 18:49:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:26,825 INFO L225 Difference]: With dead ends: 430 [2021-08-12 18:49:26,825 INFO L226 Difference]: Without dead ends: 326 [2021-08-12 18:49:26,825 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-12 18:49:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 234. [2021-08-12 18:49:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.060085836909871) internal successors, (713), 233 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 713 transitions. [2021-08-12 18:49:26,879 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 713 transitions. Word has length 21 [2021-08-12 18:49:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:26,879 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 713 transitions. [2021-08-12 18:49:26,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 713 transitions. [2021-08-12 18:49:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:26,880 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:26,880 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:26,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-12 18:49:26,880 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -577641800, now seen corresponding path program 109 times [2021-08-12 18:49:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:26,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272292020] [2021-08-12 18:49:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:26,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:26,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272292020] [2021-08-12 18:49:26,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272292020] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:26,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:26,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:26,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877812523] [2021-08-12 18:49:26,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:26,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:26,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:26,939 INFO L87 Difference]: Start difference. First operand 234 states and 713 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:27,376 INFO L93 Difference]: Finished difference Result 480 states and 1365 transitions. [2021-08-12 18:49:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:27,379 INFO L225 Difference]: With dead ends: 480 [2021-08-12 18:49:27,380 INFO L226 Difference]: Without dead ends: 392 [2021-08-12 18:49:27,380 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-12 18:49:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 234. [2021-08-12 18:49:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0085836909871246) internal successors, (701), 233 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 701 transitions. [2021-08-12 18:49:27,434 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 701 transitions. Word has length 21 [2021-08-12 18:49:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:27,434 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 701 transitions. [2021-08-12 18:49:27,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 701 transitions. [2021-08-12 18:49:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:27,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:27,435 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:27,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-12 18:49:27,435 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2094269158, now seen corresponding path program 110 times [2021-08-12 18:49:27,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:27,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875306289] [2021-08-12 18:49:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:27,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875306289] [2021-08-12 18:49:27,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875306289] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:27,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:27,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:27,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142252109] [2021-08-12 18:49:27,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:27,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:27,490 INFO L87 Difference]: Start difference. First operand 234 states and 701 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:27,933 INFO L93 Difference]: Finished difference Result 486 states and 1370 transitions. [2021-08-12 18:49:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:27,937 INFO L225 Difference]: With dead ends: 486 [2021-08-12 18:49:27,937 INFO L226 Difference]: Without dead ends: 380 [2021-08-12 18:49:27,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-12 18:49:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 222. [2021-08-12 18:49:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0) internal successors, (663), 221 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 663 transitions. [2021-08-12 18:49:27,993 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 663 transitions. Word has length 21 [2021-08-12 18:49:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:27,993 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 663 transitions. [2021-08-12 18:49:27,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 663 transitions. [2021-08-12 18:49:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:27,993 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:27,993 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:27,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-12 18:49:27,994 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 503420826, now seen corresponding path program 111 times [2021-08-12 18:49:27,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:27,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472285738] [2021-08-12 18:49:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:28,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:28,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472285738] [2021-08-12 18:49:28,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472285738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:28,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:28,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589797803] [2021-08-12 18:49:28,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:28,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:28,049 INFO L87 Difference]: Start difference. First operand 222 states and 663 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:28,468 INFO L93 Difference]: Finished difference Result 442 states and 1234 transitions. [2021-08-12 18:49:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:28,473 INFO L225 Difference]: With dead ends: 442 [2021-08-12 18:49:28,473 INFO L226 Difference]: Without dead ends: 354 [2021-08-12 18:49:28,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-12 18:49:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 198. [2021-08-12 18:49:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.918781725888325) internal successors, (575), 197 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 575 transitions. [2021-08-12 18:49:28,525 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 575 transitions. Word has length 21 [2021-08-12 18:49:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:28,525 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 575 transitions. [2021-08-12 18:49:28,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 575 transitions. [2021-08-12 18:49:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:28,526 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:28,526 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:28,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-12 18:49:28,526 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash 906396826, now seen corresponding path program 112 times [2021-08-12 18:49:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:28,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238690119] [2021-08-12 18:49:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:28,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:28,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238690119] [2021-08-12 18:49:28,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238690119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:28,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:28,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:28,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764637240] [2021-08-12 18:49:28,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:28,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:28,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:28,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:28,594 INFO L87 Difference]: Start difference. First operand 198 states and 575 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:28,945 INFO L93 Difference]: Finished difference Result 382 states and 1073 transitions. [2021-08-12 18:49:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:28,949 INFO L225 Difference]: With dead ends: 382 [2021-08-12 18:49:28,949 INFO L226 Difference]: Without dead ends: 278 [2021-08-12 18:49:28,949 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-12 18:49:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 186. [2021-08-12 18:49:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.902702702702703) internal successors, (537), 185 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 537 transitions. [2021-08-12 18:49:28,998 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 537 transitions. Word has length 21 [2021-08-12 18:49:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:28,998 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 537 transitions. [2021-08-12 18:49:28,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 537 transitions. [2021-08-12 18:49:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:28,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:28,999 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:28,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-08-12 18:49:28,999 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash 100048508, now seen corresponding path program 113 times [2021-08-12 18:49:28,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:28,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189298410] [2021-08-12 18:49:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:29,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189298410] [2021-08-12 18:49:29,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189298410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:29,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:29,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971849748] [2021-08-12 18:49:29,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:29,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:29,063 INFO L87 Difference]: Start difference. First operand 186 states and 537 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:29,404 INFO L93 Difference]: Finished difference Result 386 states and 1091 transitions. [2021-08-12 18:49:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:29,408 INFO L225 Difference]: With dead ends: 386 [2021-08-12 18:49:29,408 INFO L226 Difference]: Without dead ends: 292 [2021-08-12 18:49:29,409 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-12 18:49:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 200. [2021-08-12 18:49:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.8844221105527637) internal successors, (574), 199 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 574 transitions. [2021-08-12 18:49:29,459 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 574 transitions. Word has length 21 [2021-08-12 18:49:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:29,459 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 574 transitions. [2021-08-12 18:49:29,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 574 transitions. [2021-08-12 18:49:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:29,460 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:29,460 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:29,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-12 18:49:29,460 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -228334374, now seen corresponding path program 114 times [2021-08-12 18:49:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:29,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052221144] [2021-08-12 18:49:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:29,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052221144] [2021-08-12 18:49:29,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052221144] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:29,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:29,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909502504] [2021-08-12 18:49:29,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:29,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:29,532 INFO L87 Difference]: Start difference. First operand 200 states and 574 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:29,799 INFO L93 Difference]: Finished difference Result 292 states and 823 transitions. [2021-08-12 18:49:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:29,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:29,802 INFO L225 Difference]: With dead ends: 292 [2021-08-12 18:49:29,803 INFO L226 Difference]: Without dead ends: 180 [2021-08-12 18:49:29,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-12 18:49:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-08-12 18:49:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.916201117318436) internal successors, (522), 179 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 522 transitions. [2021-08-12 18:49:29,852 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 522 transitions. Word has length 21 [2021-08-12 18:49:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:29,852 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 522 transitions. [2021-08-12 18:49:29,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 522 transitions. [2021-08-12 18:49:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:29,852 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:29,852 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:29,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-12 18:49:29,852 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:29,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2142828290, now seen corresponding path program 115 times [2021-08-12 18:49:29,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:29,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562505994] [2021-08-12 18:49:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:29,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:29,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562505994] [2021-08-12 18:49:29,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562505994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:29,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:29,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827789764] [2021-08-12 18:49:29,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:29,923 INFO L87 Difference]: Start difference. First operand 180 states and 522 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:30,238 INFO L93 Difference]: Finished difference Result 324 states and 892 transitions. [2021-08-12 18:49:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:30,243 INFO L225 Difference]: With dead ends: 324 [2021-08-12 18:49:30,243 INFO L226 Difference]: Without dead ends: 244 [2021-08-12 18:49:30,243 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-12 18:49:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 180. [2021-08-12 18:49:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8715083798882683) internal successors, (514), 179 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 514 transitions. [2021-08-12 18:49:30,295 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 514 transitions. Word has length 21 [2021-08-12 18:49:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 514 transitions. [2021-08-12 18:49:30,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 514 transitions. [2021-08-12 18:49:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:30,296 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:30,296 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-12 18:49:30,296 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 573899748, now seen corresponding path program 116 times [2021-08-12 18:49:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:30,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783127061] [2021-08-12 18:49:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:30,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:30,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783127061] [2021-08-12 18:49:30,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783127061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:30,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:30,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451749673] [2021-08-12 18:49:30,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:30,375 INFO L87 Difference]: Start difference. First operand 180 states and 514 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:30,796 INFO L93 Difference]: Finished difference Result 338 states and 929 transitions. [2021-08-12 18:49:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:30,800 INFO L225 Difference]: With dead ends: 338 [2021-08-12 18:49:30,801 INFO L226 Difference]: Without dead ends: 236 [2021-08-12 18:49:30,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-12 18:49:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 172. [2021-08-12 18:49:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.865497076023392) internal successors, (490), 171 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 490 transitions. [2021-08-12 18:49:30,850 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 490 transitions. Word has length 21 [2021-08-12 18:49:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:30,850 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 490 transitions. [2021-08-12 18:49:30,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 490 transitions. [2021-08-12 18:49:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:30,851 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:30,851 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:30,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-12 18:49:30,851 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1071076380, now seen corresponding path program 117 times [2021-08-12 18:49:30,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:30,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143247700] [2021-08-12 18:49:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:30,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:30,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143247700] [2021-08-12 18:49:30,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143247700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:30,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:30,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186033394] [2021-08-12 18:49:30,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:30,908 INFO L87 Difference]: Start difference. First operand 172 states and 490 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:31,210 INFO L93 Difference]: Finished difference Result 300 states and 812 transitions. [2021-08-12 18:49:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:31,214 INFO L225 Difference]: With dead ends: 300 [2021-08-12 18:49:31,214 INFO L226 Difference]: Without dead ends: 220 [2021-08-12 18:49:31,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-12 18:49:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-08-12 18:49:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8) internal successors, (434), 155 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 434 transitions. [2021-08-12 18:49:31,272 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 434 transitions. Word has length 21 [2021-08-12 18:49:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:31,273 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 434 transitions. [2021-08-12 18:49:31,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 434 transitions. [2021-08-12 18:49:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:31,273 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:31,273 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:31,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-12 18:49:31,273 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash -41772188, now seen corresponding path program 118 times [2021-08-12 18:49:31,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:31,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768595363] [2021-08-12 18:49:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:31,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:31,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768595363] [2021-08-12 18:49:31,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768595363] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:31,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:31,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:31,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62132936] [2021-08-12 18:49:31,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:31,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:31,331 INFO L87 Difference]: Start difference. First operand 156 states and 434 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:31,569 INFO L93 Difference]: Finished difference Result 248 states and 683 transitions. [2021-08-12 18:49:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:31,573 INFO L225 Difference]: With dead ends: 248 [2021-08-12 18:49:31,574 INFO L226 Difference]: Without dead ends: 148 [2021-08-12 18:49:31,574 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-12 18:49:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-08-12 18:49:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7891156462585034) internal successors, (410), 147 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 410 transitions. [2021-08-12 18:49:31,620 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 410 transitions. Word has length 21 [2021-08-12 18:49:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:31,620 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 410 transitions. [2021-08-12 18:49:31,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 410 transitions. [2021-08-12 18:49:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:31,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:31,620 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:31,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-12 18:49:31,620 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -920778810, now seen corresponding path program 119 times [2021-08-12 18:49:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20951424] [2021-08-12 18:49:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:31,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:31,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20951424] [2021-08-12 18:49:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20951424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:31,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:31,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978275423] [2021-08-12 18:49:31,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:31,686 INFO L87 Difference]: Start difference. First operand 148 states and 410 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:31,920 INFO L93 Difference]: Finished difference Result 212 states and 571 transitions. [2021-08-12 18:49:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:31,924 INFO L225 Difference]: With dead ends: 212 [2021-08-12 18:49:31,924 INFO L226 Difference]: Without dead ends: 118 [2021-08-12 18:49:31,924 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-12 18:49:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-08-12 18:49:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.58974358974359) internal successors, (303), 117 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2021-08-12 18:49:31,965 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 21 [2021-08-12 18:49:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:31,965 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2021-08-12 18:49:31,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2021-08-12 18:49:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:49:31,966 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:49:31,966 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:49:31,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-12 18:49:31,966 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-08-12 18:49:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:49:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1330851492, now seen corresponding path program 120 times [2021-08-12 18:49:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:49:31,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265886866] [2021-08-12 18:49:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:49:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:49:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:49:32,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:49:32,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265886866] [2021-08-12 18:49:32,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265886866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:49:32,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:49:32,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 18:49:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931479888] [2021-08-12 18:49:32,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 18:49:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:49:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 18:49:32,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:49:32,022 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:49:32,154 INFO L93 Difference]: Finished difference Result 118 states and 303 transitions. [2021-08-12 18:49:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:49:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:49:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:49:32,158 INFO L225 Difference]: With dead ends: 118 [2021-08-12 18:49:32,158 INFO L226 Difference]: Without dead ends: 0 [2021-08-12 18:49:32,158 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:49:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-12 18:49:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-12 18:49:32,158 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) [2021-08-12 18:49:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-12 18:49:32,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-08-12 18:49:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:49:32,160 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-12 18:49:32,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:49:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-12 18:49:32,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-12 18:49:32,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-12 18:49:32,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-12 18:49:33,331 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:49:34,145 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:49:34,994 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:49:45,267 WARN L205 SmtUtils]: Spent 10.27 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:49:45,967 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:49:56,204 WARN L205 SmtUtils]: Spent 10.23 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:06,461 WARN L205 SmtUtils]: Spent 10.24 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:16,362 WARN L205 SmtUtils]: Spent 9.90 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:17,076 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:50:27,107 WARN L205 SmtUtils]: Spent 9.97 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:27,876 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:50:37,931 WARN L205 SmtUtils]: Spent 10.05 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:48,044 WARN L205 SmtUtils]: Spent 10.09 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:50:58,022 WARN L205 SmtUtils]: Spent 9.92 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:51:07,945 WARN L205 SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:51:17,805 WARN L205 SmtUtils]: Spent 9.86 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:51:18,529 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:51:28,374 WARN L205 SmtUtils]: Spent 9.67 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:51:37,882 WARN L205 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:51:38,955 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:39,884 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:51:40,650 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:51:41,306 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:51:41,908 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:51:42,569 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:43,232 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:51:44,022 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:51:45,287 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:51:46,269 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:47,002 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:47,654 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:51:48,247 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:51:48,869 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:51:49,539 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:51:50,335 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:51:51,090 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:51,742 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:51:52,348 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:51:52,977 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:51:53,652 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:51:54,355 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:51:54,963 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:51:55,593 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:51:56,289 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:05,680 WARN L205 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:52:06,303 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:06,954 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:07,618 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:08,361 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:09,058 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:09,748 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:10,702 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:52:11,685 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:52:12,428 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:52:13,134 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:52:14,035 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:52:14,687 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:15,307 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:16,063 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:52:16,732 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:17,415 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:18,008 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:18,622 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:52:19,270 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:28,734 WARN L205 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:52:29,340 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:29,993 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:30,731 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:31,487 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:32,175 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:32,836 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:52:33,540 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:34,137 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:34,762 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 187 [2021-08-12 18:52:34,874 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:52:34,996 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:52:35,631 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:44,941 WARN L205 SmtUtils]: Spent 9.31 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:52:45,588 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:46,229 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:46,879 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:52:47,525 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:48,121 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:52:48,752 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:52:58,150 WARN L205 SmtUtils]: Spent 9.40 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:52:58,769 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:53:08,185 WARN L205 SmtUtils]: Spent 9.41 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:53:17,607 WARN L205 SmtUtils]: Spent 9.42 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:53:18,243 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:53:18,916 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:53:19,623 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:53:20,281 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:53:20,948 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:53:21,817 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:22,645 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:23,349 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:24,135 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:24,898 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:25,600 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:26,304 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:53:27,126 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:53:27,723 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:53:28,350 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 188 [2021-08-12 18:53:28,463 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:53:28,584 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:53:29,214 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:53:38,618 WARN L205 SmtUtils]: Spent 9.40 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:53:39,214 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:53:39,882 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:53:40,535 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:53:41,170 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:53:41,776 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:53:42,410 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:53:51,793 WARN L205 SmtUtils]: Spent 9.38 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:53:52,394 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:54:01,814 WARN L205 SmtUtils]: Spent 9.42 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:11,188 WARN L205 SmtUtils]: Spent 9.37 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:11,827 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:54:12,511 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:54:13,204 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:54:13,865 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:54:14,533 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:54:15,194 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:54:15,844 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:54:15,958 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:54:16,081 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:54:16,715 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:54:26,036 WARN L205 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:26,632 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:54:26,744 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:54:27,425 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:54:27,547 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:54:36,846 WARN L205 SmtUtils]: Spent 9.30 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:46,224 WARN L205 SmtUtils]: Spent 9.38 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:46,858 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:54:47,495 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:54:56,883 WARN L205 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:54:57,482 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:55:07,042 WARN L205 SmtUtils]: Spent 9.56 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:55:16,558 WARN L205 SmtUtils]: Spent 9.51 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:55:26,049 WARN L205 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:55:26,711 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:55:27,370 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:55:28,034 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:55:28,825 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:29,689 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:30,453 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:31,284 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:31,987 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:32,699 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:33,401 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 167 [2021-08-12 18:55:34,096 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:55:34,717 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:55:34,829 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:55:34,950 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:55:35,605 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:55:45,169 WARN L205 SmtUtils]: Spent 9.56 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:55:45,811 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:55:45,927 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:55:46,615 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:55:46,742 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:55:56,319 WARN L205 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:05,778 WARN L205 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:06,428 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 179 [2021-08-12 18:56:07,063 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:56:16,479 WARN L205 SmtUtils]: Spent 9.41 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:17,089 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:56:26,451 WARN L205 SmtUtils]: Spent 9.36 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:35,772 WARN L205 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:45,409 WARN L205 SmtUtils]: Spent 9.63 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:46,090 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:56:46,769 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:56:47,439 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 171 [2021-08-12 18:56:48,092 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:56:48,724 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 183 [2021-08-12 18:56:58,107 WARN L205 SmtUtils]: Spent 9.38 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:56:58,727 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:56:59,320 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 173 [2021-08-12 18:56:59,432 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 100 [2021-08-12 18:57:00,143 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:57:00,273 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2021-08-12 18:57:09,739 WARN L205 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:57:19,132 WARN L205 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:57:19,830 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:57:20,509 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 184 [2021-08-12 18:57:29,871 WARN L205 SmtUtils]: Spent 9.36 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:57:39,423 WARN L205 SmtUtils]: Spent 9.55 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 [2021-08-12 18:57:48,753 WARN L205 SmtUtils]: Spent 9.33 s on a formula simplification. DAG size of input: 711 DAG size of output: 472 Received shutdown request... [2021-08-12 18:57:57,654 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2021-08-12 18:57:57,655 INFO L168 Benchmark]: Toolchain (without parser) took 566363.99 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 196.4 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-12 18:57:57,655 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 215.0 MB. Free memory is still 197.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 18:57:57,655 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 215.0 MB. Free memory was 196.3 MB in the beginning and 194.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 18:57:57,655 INFO L168 Benchmark]: Boogie Preprocessor took 13.12 ms. Allocated memory is still 215.0 MB. Free memory was 194.8 MB in the beginning and 194.0 MB in the end (delta: 834.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 18:57:57,655 INFO L168 Benchmark]: RCFGBuilder took 211.79 ms. Allocated memory is still 215.0 MB. Free memory was 193.8 MB in the beginning and 183.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-12 18:57:57,655 INFO L168 Benchmark]: TraceAbstraction took 566106.07 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 183.3 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-12 18:57:57,656 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 0.15 ms. Allocated memory is still 215.0 MB. Free memory is still 197.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 215.0 MB. Free memory was 196.3 MB in the beginning and 194.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.12 ms. Allocated memory is still 215.0 MB. Free memory was 194.8 MB in the beginning and 194.0 MB in the end (delta: 834.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 211.79 ms. Allocated memory is still 215.0 MB. Free memory was 193.8 MB in the beginning and 183.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 566106.07 ms. Allocated memory was 215.0 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 183.3 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 692 for 8896ms.. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown