/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 01:54:34,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 01:54:34,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 01:54:34,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 01:54:34,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 01:54:34,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 01:54:34,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 01:54:34,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 01:54:34,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 01:54:34,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 01:54:34,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 01:54:34,249 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 01:54:34,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 01:54:34,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 01:54:34,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 01:54:34,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 01:54:34,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 01:54:34,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:54:34,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 01:54:34,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 01:54:34,253 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 01:54:34,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 01:54:34,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 01:54:34,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 01:54:34,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 01:54:34,559 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 01:54:34,561 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 01:54:34,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-05-22 01:54:34,562 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-05-22 01:54:34,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 01:54:34,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 01:54:34,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 01:54:34,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 01:54:34,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 01:54:34,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 01:54:34,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 01:54:34,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 01:54:34,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 01:54:34,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... [2021-05-22 01:54:34,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 01:54:34,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 01:54:34,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 01:54:34,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 01:54:34,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 01:54:34,720 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-05-22 01:54:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-05-22 01:54:34,720 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-05-22 01:54:34,720 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-05-22 01:54:34,720 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-05-22 01:54:34,721 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-05-22 01:54:34,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-05-22 01:54:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-05-22 01:54:34,721 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-05-22 01:54:34,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-05-22 01:54:34,721 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-05-22 01:54:34,721 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-05-22 01:54:34,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 01:54:34,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 01:54:34,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 01:54:34,723 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 01:54:34,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 01:54:34,843 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 01:54:34,844 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:54:34 BoogieIcfgContainer [2021-05-22 01:54:34,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 01:54:34,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 01:54:34,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 01:54:34,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 01:54:34,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 01:54:34" (1/2) ... [2021-05-22 01:54:34,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273bdc1d and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 01:54:34, skipping insertion in model container [2021-05-22 01:54:34,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 01:54:34" (2/2) ... [2021-05-22 01:54:34,850 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-05-22 01:54:34,855 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 01:54:34,855 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 01:54:34,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 01:54:34,856 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 01:54:34,905 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-05-22 01:54:34,923 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 01:54:34,955 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:54:34,955 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:54:34,955 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:54:34,955 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:54:34,955 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:54:34,955 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:54:34,956 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:54:34,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 01:54:34,976 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 138 flow [2021-05-22 01:54:35,033 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,060 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1503386291, now seen corresponding path program 1 times [2021-05-22 01:54:35,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370393174] [2021-05-22 01:54:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:35,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370393174] [2021-05-22 01:54:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370393174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:35,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:35,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:54:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146223460] [2021-05-22 01:54:35,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:54:35,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:54:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,244 INFO L87 Difference]: Start difference. First operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:35,285 INFO L93 Difference]: Finished difference Result 272 states and 771 transitions. [2021-05-22 01:54:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:54:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:35,310 INFO L225 Difference]: With dead ends: 272 [2021-05-22 01:54:35,310 INFO L226 Difference]: Without dead ends: 270 [2021-05-22 01:54:35,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-22 01:54:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-05-22 01:54:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.858736059479554) internal successors, (769), 269 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 769 transitions. [2021-05-22 01:54:35,382 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 769 transitions. Word has length 17 [2021-05-22 01:54:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:35,383 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 769 transitions. [2021-05-22 01:54:35,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 769 transitions. [2021-05-22 01:54:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 01:54:35,385 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash 591735021, now seen corresponding path program 1 times [2021-05-22 01:54:35,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248999724] [2021-05-22 01:54:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:35,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248999724] [2021-05-22 01:54:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248999724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:35,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:35,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:54:35,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364352454] [2021-05-22 01:54:35,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:54:35,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:54:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,420 INFO L87 Difference]: Start difference. First operand 270 states and 769 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:35,428 INFO L93 Difference]: Finished difference Result 216 states and 589 transitions. [2021-05-22 01:54:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:54:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:35,430 INFO L225 Difference]: With dead ends: 216 [2021-05-22 01:54:35,431 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 01:54:35,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 01:54:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-05-22 01:54:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.73953488372093) internal successors, (589), 215 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 589 transitions. [2021-05-22 01:54:35,441 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 589 transitions. Word has length 17 [2021-05-22 01:54:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:35,441 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 589 transitions. [2021-05-22 01:54:35,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 589 transitions. [2021-05-22 01:54:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 01:54:35,444 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash -345548245, now seen corresponding path program 1 times [2021-05-22 01:54:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104919912] [2021-05-22 01:54:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:35,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:35,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104919912] [2021-05-22 01:54:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104919912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:35,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:35,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 01:54:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101398378] [2021-05-22 01:54:35,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 01:54:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:35,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 01:54:35,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,483 INFO L87 Difference]: Start difference. First operand 216 states and 589 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:35,499 INFO L93 Difference]: Finished difference Result 162 states and 433 transitions. [2021-05-22 01:54:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 01:54:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:35,501 INFO L225 Difference]: With dead ends: 162 [2021-05-22 01:54:35,501 INFO L226 Difference]: Without dead ends: 162 [2021-05-22 01:54:35,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 01:54:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-22 01:54:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-05-22 01:54:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.68944099378882) internal successors, (433), 161 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 433 transitions. [2021-05-22 01:54:35,516 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 433 transitions. Word has length 17 [2021-05-22 01:54:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:35,516 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 433 transitions. [2021-05-22 01:54:35,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 433 transitions. [2021-05-22 01:54:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,518 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,518 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 01:54:35,518 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1896362483, now seen corresponding path program 1 times [2021-05-22 01:54:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879523016] [2021-05-22 01:54:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:35,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:35,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879523016] [2021-05-22 01:54:35,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879523016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:35,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:35,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:35,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958394069] [2021-05-22 01:54:35,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:35,670 INFO L87 Difference]: Start difference. First operand 162 states and 433 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:35,715 INFO L93 Difference]: Finished difference Result 304 states and 750 transitions. [2021-05-22 01:54:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:35,717 INFO L225 Difference]: With dead ends: 304 [2021-05-22 01:54:35,717 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 01:54:35,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 01:54:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 170. [2021-05-22 01:54:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6804733727810652) internal successors, (453), 169 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2021-05-22 01:54:35,727 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 17 [2021-05-22 01:54:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:35,727 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2021-05-22 01:54:35,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2021-05-22 01:54:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,729 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 01:54:35,729 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 448349167, now seen corresponding path program 2 times [2021-05-22 01:54:35,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826748823] [2021-05-22 01:54:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:35,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:35,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826748823] [2021-05-22 01:54:35,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826748823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:35,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:35,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22179062] [2021-05-22 01:54:35,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:35,922 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:35,967 INFO L93 Difference]: Finished difference Result 319 states and 785 transitions. [2021-05-22 01:54:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:35,969 INFO L225 Difference]: With dead ends: 319 [2021-05-22 01:54:35,969 INFO L226 Difference]: Without dead ends: 257 [2021-05-22 01:54:35,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-22 01:54:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2021-05-22 01:54:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.6645962732919255) internal successors, (429), 161 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 429 transitions. [2021-05-22 01:54:35,977 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 429 transitions. Word has length 17 [2021-05-22 01:54:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:35,977 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 429 transitions. [2021-05-22 01:54:35,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 429 transitions. [2021-05-22 01:54:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:35,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:35,978 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:35,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 01:54:35,979 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash 808670063, now seen corresponding path program 3 times [2021-05-22 01:54:35,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:35,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967231452] [2021-05-22 01:54:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967231452] [2021-05-22 01:54:36,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967231452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436698217] [2021-05-22 01:54:36,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,095 INFO L87 Difference]: Start difference. First operand 162 states and 429 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:36,134 INFO L93 Difference]: Finished difference Result 291 states and 712 transitions. [2021-05-22 01:54:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:36,136 INFO L225 Difference]: With dead ends: 291 [2021-05-22 01:54:36,137 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 01:54:36,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 01:54:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2021-05-22 01:54:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.6484848484848484) internal successors, (437), 165 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 437 transitions. [2021-05-22 01:54:36,144 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 437 transitions. Word has length 17 [2021-05-22 01:54:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:36,145 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 437 transitions. [2021-05-22 01:54:36,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 437 transitions. [2021-05-22 01:54:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:36,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:36,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:36,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 01:54:36,146 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash -209274001, now seen corresponding path program 4 times [2021-05-22 01:54:36,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:36,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316095384] [2021-05-22 01:54:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316095384] [2021-05-22 01:54:36,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316095384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032470036] [2021-05-22 01:54:36,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,241 INFO L87 Difference]: Start difference. First operand 166 states and 437 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:36,297 INFO L93 Difference]: Finished difference Result 297 states and 725 transitions. [2021-05-22 01:54:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:36,299 INFO L225 Difference]: With dead ends: 297 [2021-05-22 01:54:36,299 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 01:54:36,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 01:54:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2021-05-22 01:54:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.652173913043478) internal successors, (427), 161 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 427 transitions. [2021-05-22 01:54:36,305 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 427 transitions. Word has length 17 [2021-05-22 01:54:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:36,306 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 427 transitions. [2021-05-22 01:54:36,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 427 transitions. [2021-05-22 01:54:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:36,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:36,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:36,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 01:54:36,307 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1120579375, now seen corresponding path program 5 times [2021-05-22 01:54:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:36,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973637159] [2021-05-22 01:54:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973637159] [2021-05-22 01:54:36,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973637159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482030238] [2021-05-22 01:54:36,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,433 INFO L87 Difference]: Start difference. First operand 162 states and 427 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:36,472 INFO L93 Difference]: Finished difference Result 332 states and 818 transitions. [2021-05-22 01:54:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:36,474 INFO L225 Difference]: With dead ends: 332 [2021-05-22 01:54:36,474 INFO L226 Difference]: Without dead ends: 278 [2021-05-22 01:54:36,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-22 01:54:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2021-05-22 01:54:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.602272727272727) internal successors, (458), 176 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 458 transitions. [2021-05-22 01:54:36,482 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 458 transitions. Word has length 17 [2021-05-22 01:54:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:36,482 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 458 transitions. [2021-05-22 01:54:36,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 458 transitions. [2021-05-22 01:54:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:36,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:36,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:36,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 01:54:36,483 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1448962257, now seen corresponding path program 6 times [2021-05-22 01:54:36,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:36,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278749808] [2021-05-22 01:54:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278749808] [2021-05-22 01:54:36,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278749808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577144018] [2021-05-22 01:54:36,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,592 INFO L87 Difference]: Start difference. First operand 177 states and 458 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:36,647 INFO L93 Difference]: Finished difference Result 323 states and 785 transitions. [2021-05-22 01:54:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:36,651 INFO L225 Difference]: With dead ends: 323 [2021-05-22 01:54:36,651 INFO L226 Difference]: Without dead ends: 257 [2021-05-22 01:54:36,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-22 01:54:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 156. [2021-05-22 01:54:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6516129032258067) internal successors, (411), 155 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 411 transitions. [2021-05-22 01:54:36,660 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 411 transitions. Word has length 17 [2021-05-22 01:54:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:36,660 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 411 transitions. [2021-05-22 01:54:36,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 411 transitions. [2021-05-22 01:54:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:36,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:36,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:36,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 01:54:36,665 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash -815299857, now seen corresponding path program 7 times [2021-05-22 01:54:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:36,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998091205] [2021-05-22 01:54:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998091205] [2021-05-22 01:54:36,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998091205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816927974] [2021-05-22 01:54:36,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,798 INFO L87 Difference]: Start difference. First operand 156 states and 411 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:36,841 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2021-05-22 01:54:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:36,843 INFO L225 Difference]: With dead ends: 290 [2021-05-22 01:54:36,843 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 01:54:36,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 01:54:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 156. [2021-05-22 01:54:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6258064516129034) internal successors, (407), 155 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 407 transitions. [2021-05-22 01:54:36,851 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 407 transitions. Word has length 17 [2021-05-22 01:54:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:36,851 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 407 transitions. [2021-05-22 01:54:36,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 407 transitions. [2021-05-22 01:54:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:36,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:36,852 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:36,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 01:54:36,852 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:36,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1529411793, now seen corresponding path program 8 times [2021-05-22 01:54:36,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:36,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297957005] [2021-05-22 01:54:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:36,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:36,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297957005] [2021-05-22 01:54:36,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297957005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:36,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:36,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:36,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787534751] [2021-05-22 01:54:36,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:36,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:36,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:36,974 INFO L87 Difference]: Start difference. First operand 156 states and 407 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,032 INFO L93 Difference]: Finished difference Result 305 states and 739 transitions. [2021-05-22 01:54:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,034 INFO L225 Difference]: With dead ends: 305 [2021-05-22 01:54:37,034 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 01:54:37,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 01:54:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 148. [2021-05-22 01:54:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6054421768707483) internal successors, (383), 147 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2021-05-22 01:54:37,040 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 17 [2021-05-22 01:54:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,040 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2021-05-22 01:54:37,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2021-05-22 01:54:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 01:54:37,041 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 192998127, now seen corresponding path program 9 times [2021-05-22 01:54:37,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630200653] [2021-05-22 01:54:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630200653] [2021-05-22 01:54:37,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630200653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655063397] [2021-05-22 01:54:37,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,107 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,145 INFO L93 Difference]: Finished difference Result 267 states and 641 transitions. [2021-05-22 01:54:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,146 INFO L225 Difference]: With dead ends: 267 [2021-05-22 01:54:37,146 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 01:54:37,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 01:54:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2021-05-22 01:54:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.589403973509934) internal successors, (391), 151 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 391 transitions. [2021-05-22 01:54:37,154 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 391 transitions. Word has length 17 [2021-05-22 01:54:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,155 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 391 transitions. [2021-05-22 01:54:37,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 391 transitions. [2021-05-22 01:54:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 01:54:37,156 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1503575313, now seen corresponding path program 10 times [2021-05-22 01:54:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980718062] [2021-05-22 01:54:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980718062] [2021-05-22 01:54:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980718062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335523046] [2021-05-22 01:54:37,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,242 INFO L87 Difference]: Start difference. First operand 152 states and 391 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,285 INFO L93 Difference]: Finished difference Result 239 states and 584 transitions. [2021-05-22 01:54:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,287 INFO L225 Difference]: With dead ends: 239 [2021-05-22 01:54:37,287 INFO L226 Difference]: Without dead ends: 192 [2021-05-22 01:54:37,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-22 01:54:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2021-05-22 01:54:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5918367346938775) internal successors, (381), 147 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 381 transitions. [2021-05-22 01:54:37,293 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 381 transitions. Word has length 17 [2021-05-22 01:54:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,293 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 381 transitions. [2021-05-22 01:54:37,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 381 transitions. [2021-05-22 01:54:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 01:54:37,295 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1736251311, now seen corresponding path program 11 times [2021-05-22 01:54:37,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897008598] [2021-05-22 01:54:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897008598] [2021-05-22 01:54:37,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897008598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873535368] [2021-05-22 01:54:37,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,366 INFO L87 Difference]: Start difference. First operand 148 states and 381 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,398 INFO L93 Difference]: Finished difference Result 288 states and 697 transitions. [2021-05-22 01:54:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,399 INFO L225 Difference]: With dead ends: 288 [2021-05-22 01:54:37,400 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 01:54:37,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 01:54:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 158. [2021-05-22 01:54:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5605095541401273) internal successors, (402), 157 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 402 transitions. [2021-05-22 01:54:37,405 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 402 transitions. Word has length 17 [2021-05-22 01:54:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,406 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 402 transitions. [2021-05-22 01:54:37,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 402 transitions. [2021-05-22 01:54:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 01:54:37,407 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1648314577, now seen corresponding path program 12 times [2021-05-22 01:54:37,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729892075] [2021-05-22 01:54:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729892075] [2021-05-22 01:54:37,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729892075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676275490] [2021-05-22 01:54:37,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,463 INFO L87 Difference]: Start difference. First operand 158 states and 402 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,502 INFO L93 Difference]: Finished difference Result 245 states and 595 transitions. [2021-05-22 01:54:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,503 INFO L225 Difference]: With dead ends: 245 [2021-05-22 01:54:37,503 INFO L226 Difference]: Without dead ends: 188 [2021-05-22 01:54:37,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-22 01:54:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-05-22 01:54:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5944055944055946) internal successors, (371), 143 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2021-05-22 01:54:37,508 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 17 [2021-05-22 01:54:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,508 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2021-05-22 01:54:37,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2021-05-22 01:54:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,509 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 01:54:37,509 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash 601862097, now seen corresponding path program 13 times [2021-05-22 01:54:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044313439] [2021-05-22 01:54:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044313439] [2021-05-22 01:54:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044313439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567509393] [2021-05-22 01:54:37,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,565 INFO L87 Difference]: Start difference. First operand 144 states and 371 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,596 INFO L93 Difference]: Finished difference Result 261 states and 622 transitions. [2021-05-22 01:54:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,598 INFO L225 Difference]: With dead ends: 261 [2021-05-22 01:54:37,598 INFO L226 Difference]: Without dead ends: 222 [2021-05-22 01:54:37,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-22 01:54:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 144. [2021-05-22 01:54:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5664335664335662) internal successors, (367), 143 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 367 transitions. [2021-05-22 01:54:37,603 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 367 transitions. Word has length 17 [2021-05-22 01:54:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,604 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 367 transitions. [2021-05-22 01:54:37,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 367 transitions. [2021-05-22 01:54:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 01:54:37,605 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash -416081967, now seen corresponding path program 14 times [2021-05-22 01:54:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013396769] [2021-05-22 01:54:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013396769] [2021-05-22 01:54:37,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013396769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656003943] [2021-05-22 01:54:37,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,661 INFO L87 Difference]: Start difference. First operand 144 states and 367 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,700 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2021-05-22 01:54:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,702 INFO L225 Difference]: With dead ends: 267 [2021-05-22 01:54:37,702 INFO L226 Difference]: Without dead ends: 218 [2021-05-22 01:54:37,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-22 01:54:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2021-05-22 01:54:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.568345323741007) internal successors, (357), 139 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 357 transitions. [2021-05-22 01:54:37,707 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 357 transitions. Word has length 17 [2021-05-22 01:54:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,707 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 357 transitions. [2021-05-22 01:54:37,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 357 transitions. [2021-05-22 01:54:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 01:54:37,708 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1441474897, now seen corresponding path program 15 times [2021-05-22 01:54:37,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14082562] [2021-05-22 01:54:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14082562] [2021-05-22 01:54:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14082562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940497655] [2021-05-22 01:54:37,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,765 INFO L87 Difference]: Start difference. First operand 140 states and 357 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,793 INFO L93 Difference]: Finished difference Result 247 states and 583 transitions. [2021-05-22 01:54:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,795 INFO L225 Difference]: With dead ends: 247 [2021-05-22 01:54:37,795 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 01:54:37,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 01:54:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 132. [2021-05-22 01:54:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5419847328244276) internal successors, (333), 131 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 333 transitions. [2021-05-22 01:54:37,799 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 333 transitions. Word has length 17 [2021-05-22 01:54:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,799 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 333 transitions. [2021-05-22 01:54:37,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 333 transitions. [2021-05-22 01:54:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 01:54:37,800 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash -422512687, now seen corresponding path program 16 times [2021-05-22 01:54:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345684687] [2021-05-22 01:54:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345684687] [2021-05-22 01:54:37,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345684687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580632754] [2021-05-22 01:54:37,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,862 INFO L87 Difference]: Start difference. First operand 132 states and 333 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:37,901 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2021-05-22 01:54:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:37,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:37,902 INFO L225 Difference]: With dead ends: 219 [2021-05-22 01:54:37,902 INFO L226 Difference]: Without dead ends: 172 [2021-05-22 01:54:37,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-22 01:54:37,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-05-22 01:54:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.543307086614173) internal successors, (323), 127 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2021-05-22 01:54:37,914 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 17 [2021-05-22 01:54:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:37,914 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2021-05-22 01:54:37,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2021-05-22 01:54:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:37,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:37,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:37,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 01:54:37,915 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:37,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1264414673, now seen corresponding path program 17 times [2021-05-22 01:54:37,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:37,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103915825] [2021-05-22 01:54:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:37,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103915825] [2021-05-22 01:54:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103915825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445663708] [2021-05-22 01:54:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:37,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:37,977 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,018 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2021-05-22 01:54:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,019 INFO L225 Difference]: With dead ends: 223 [2021-05-22 01:54:38,019 INFO L226 Difference]: Without dead ends: 178 [2021-05-22 01:54:38,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-22 01:54:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-05-22 01:54:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.526315789473684) internal successors, (336), 133 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2021-05-22 01:54:38,023 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 17 [2021-05-22 01:54:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,023 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2021-05-22 01:54:38,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2021-05-22 01:54:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 01:54:38,024 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 936031791, now seen corresponding path program 18 times [2021-05-22 01:54:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212902244] [2021-05-22 01:54:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212902244] [2021-05-22 01:54:38,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212902244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236003957] [2021-05-22 01:54:38,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,084 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,119 INFO L93 Difference]: Finished difference Result 177 states and 432 transitions. [2021-05-22 01:54:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,120 INFO L225 Difference]: With dead ends: 177 [2021-05-22 01:54:38,120 INFO L226 Difference]: Without dead ends: 126 [2021-05-22 01:54:38,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-22 01:54:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-22 01:54:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.552) internal successors, (319), 125 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 319 transitions. [2021-05-22 01:54:38,123 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 319 transitions. Word has length 17 [2021-05-22 01:54:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,123 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 319 transitions. [2021-05-22 01:54:38,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 319 transitions. [2021-05-22 01:54:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,124 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,124 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 01:54:38,124 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1679709363, now seen corresponding path program 19 times [2021-05-22 01:54:38,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979289126] [2021-05-22 01:54:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979289126] [2021-05-22 01:54:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979289126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151634835] [2021-05-22 01:54:38,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,205 INFO L87 Difference]: Start difference. First operand 126 states and 319 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,255 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2021-05-22 01:54:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,257 INFO L225 Difference]: With dead ends: 212 [2021-05-22 01:54:38,257 INFO L226 Difference]: Without dead ends: 158 [2021-05-22 01:54:38,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-22 01:54:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 126. [2021-05-22 01:54:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.464) internal successors, (308), 125 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 308 transitions. [2021-05-22 01:54:38,260 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 308 transitions. Word has length 17 [2021-05-22 01:54:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,261 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 308 transitions. [2021-05-22 01:54:38,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 308 transitions. [2021-05-22 01:54:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 01:54:38,262 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1351326481, now seen corresponding path program 20 times [2021-05-22 01:54:38,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358131646] [2021-05-22 01:54:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358131646] [2021-05-22 01:54:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358131646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818275646] [2021-05-22 01:54:38,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,334 INFO L87 Difference]: Start difference. First operand 126 states and 308 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,374 INFO L93 Difference]: Finished difference Result 203 states and 474 transitions. [2021-05-22 01:54:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,376 INFO L225 Difference]: With dead ends: 203 [2021-05-22 01:54:38,376 INFO L226 Difference]: Without dead ends: 143 [2021-05-22 01:54:38,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-22 01:54:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-05-22 01:54:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.4545454545454546) internal successors, (270), 110 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 270 transitions. [2021-05-22 01:54:38,381 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 270 transitions. Word has length 17 [2021-05-22 01:54:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,381 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 270 transitions. [2021-05-22 01:54:38,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 270 transitions. [2021-05-22 01:54:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 01:54:38,382 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash -363627631, now seen corresponding path program 21 times [2021-05-22 01:54:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790625719] [2021-05-22 01:54:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790625719] [2021-05-22 01:54:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790625719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363871197] [2021-05-22 01:54:38,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,442 INFO L87 Difference]: Start difference. First operand 111 states and 270 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,467 INFO L93 Difference]: Finished difference Result 174 states and 399 transitions. [2021-05-22 01:54:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,468 INFO L225 Difference]: With dead ends: 174 [2021-05-22 01:54:38,468 INFO L226 Difference]: Without dead ends: 120 [2021-05-22 01:54:38,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-22 01:54:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-05-22 01:54:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-05-22 01:54:38,471 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-05-22 01:54:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,471 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-05-22 01:54:38,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-05-22 01:54:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,472 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 01:54:38,472 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1855122543, now seen corresponding path program 22 times [2021-05-22 01:54:38,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460698686] [2021-05-22 01:54:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460698686] [2021-05-22 01:54:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460698686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505708251] [2021-05-22 01:54:38,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,533 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,569 INFO L93 Difference]: Finished difference Result 131 states and 297 transitions. [2021-05-22 01:54:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,570 INFO L225 Difference]: With dead ends: 131 [2021-05-22 01:54:38,570 INFO L226 Difference]: Without dead ends: 78 [2021-05-22 01:54:38,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-22 01:54:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-22 01:54:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 175 transitions. [2021-05-22 01:54:38,577 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 175 transitions. Word has length 17 [2021-05-22 01:54:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,577 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 175 transitions. [2021-05-22 01:54:38,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 175 transitions. [2021-05-22 01:54:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,578 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 01:54:38,578 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash -40818065, now seen corresponding path program 23 times [2021-05-22 01:54:38,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232264694] [2021-05-22 01:54:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232264694] [2021-05-22 01:54:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232264694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000133508] [2021-05-22 01:54:38,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,640 INFO L87 Difference]: Start difference. First operand 78 states and 175 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,673 INFO L93 Difference]: Finished difference Result 109 states and 239 transitions. [2021-05-22 01:54:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,674 INFO L225 Difference]: With dead ends: 109 [2021-05-22 01:54:38,674 INFO L226 Difference]: Without dead ends: 64 [2021-05-22 01:54:38,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-22 01:54:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-22 01:54:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2021-05-22 01:54:38,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 17 [2021-05-22 01:54:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,677 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2021-05-22 01:54:38,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2021-05-22 01:54:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 01:54:38,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 01:54:38,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 01:54:38,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 01:54:38,677 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 01:54:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 01:54:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1630752815, now seen corresponding path program 24 times [2021-05-22 01:54:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 01:54:38,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035927068] [2021-05-22 01:54:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 01:54:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 01:54:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 01:54:38,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 01:54:38,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035927068] [2021-05-22 01:54:38,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035927068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 01:54:38,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 01:54:38,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 01:54:38,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815955348] [2021-05-22 01:54:38,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 01:54:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 01:54:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 01:54:38,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 01:54:38,740 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 01:54:38,769 INFO L93 Difference]: Finished difference Result 63 states and 131 transitions. [2021-05-22 01:54:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 01:54:38,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 01:54:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 01:54:38,770 INFO L225 Difference]: With dead ends: 63 [2021-05-22 01:54:38,770 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 01:54:38,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 01:54:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 01:54:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 01:54:38,770 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) [2021-05-22 01:54:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 01:54:38,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-22 01:54:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 01:54:38,771 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 01:54:38,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 01:54:38,771 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:54:38,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 01:54:38,771 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 01:54:38,773 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-22 01:54:38,773 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 01:54:38,773 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 01:54:38,774 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 01:54:38,774 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 01:54:38,774 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 01:54:38,774 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 01:54:38,774 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 01:54:38,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 01:54:38,775 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 138 flow [2021-05-22 01:54:38,784 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 01:54:38,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 01:54:38,786 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 01:54:38,786 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 01:54:38,788 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 01:54:38 BasicIcfg [2021-05-22 01:54:38,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 01:54:38,789 INFO L168 Benchmark]: Toolchain (without parser) took 4186.15 ms. Allocated memory is still 360.7 MB. Free memory was 340.8 MB in the beginning and 232.6 MB in the end (delta: 108.2 MB). Peak memory consumption was 108.5 MB. Max. memory is 16.0 GB. [2021-05-22 01:54:38,789 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 360.7 MB. Free memory was 341.8 MB in the beginning and 341.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:54:38,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 01:54:38,789 INFO L168 Benchmark]: Boogie Preprocessor took 11.13 ms. Allocated memory is still 360.7 MB. Free memory was 339.2 MB in the beginning and 338.4 MB in the end (delta: 833.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 01:54:38,789 INFO L168 Benchmark]: RCFGBuilder took 200.82 ms. Allocated memory is still 360.7 MB. Free memory was 338.3 MB in the beginning and 328.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-22 01:54:38,789 INFO L168 Benchmark]: TraceAbstraction took 3942.58 ms. Allocated memory is still 360.7 MB. Free memory was 328.3 MB in the beginning and 232.6 MB in the end (delta: 95.7 MB). Peak memory consumption was 95.9 MB. Max. memory is 16.0 GB. [2021-05-22 01:54:38,790 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 0.14 ms. Allocated memory is still 360.7 MB. Free memory was 341.8 MB in the beginning and 341.7 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.13 ms. Allocated memory is still 360.7 MB. Free memory was 339.2 MB in the beginning and 338.4 MB in the end (delta: 833.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 200.82 ms. Allocated memory is still 360.7 MB. Free memory was 338.3 MB in the beginning and 328.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3942.58 ms. Allocated memory is still 360.7 MB. Free memory was 328.3 MB in the beginning and 232.6 MB in the end (delta: 95.7 MB). Peak memory consumption was 95.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3818.5ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 44.7ms, AutomataDifference: 1151.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1010 SDtfs, 1212 SDslu, 1379 SDs, 0 SdLazy, 327 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 321.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1561.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=0, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 209.9ms AutomataMinimizationTime, 27 MinimizatonAttempts, 1410 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.4ms SsaConstructionTime, 85.7ms SatisfiabilityAnalysisTime, 1956.9ms InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 6156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 9 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...