/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:44:17,205 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 15:44:17,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:44:17,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:44:17,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:44:17,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:44:17,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:44:17,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:44:17,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:44:17,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:44:17,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:44:17,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:44:17,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:44:17,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:44:17,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:44:17,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:44:17,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:44:17,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:44:17,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:44:17,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:44:17,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:44:17,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:44:17,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:44:17,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:44:17,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:44:17,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:44:17,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:44:17,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:44:17,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:44:17,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:44:17,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:44:17,335 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:44:17,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:44:17,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:44:17,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:44:17,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:44:17,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:44:17,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:44:17,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:44:17,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:44:17,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:44:17,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:44:17,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:44:17,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:17,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:44:17,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:44:17,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:44:17,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:44:17,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:44:17,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:44:17,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:44:17,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:44:17,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:44:17,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:44:17,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:44:17,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:44:17,679 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:44:17,680 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 15:44:17,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbe359ab3/4a9674a46c0947019bd88d034a1e83b9/FLAGd84a3d24e [2020-08-21 15:44:18,208 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:44:18,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 15:44:18,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbe359ab3/4a9674a46c0947019bd88d034a1e83b9/FLAGd84a3d24e [2020-08-21 15:44:18,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbe359ab3/4a9674a46c0947019bd88d034a1e83b9 [2020-08-21 15:44:18,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:44:18,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:44:18,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:18,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:44:18,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:44:18,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb36d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18, skipping insertion in model container [2020-08-21 15:44:18,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:44:18,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:44:18,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:18,831 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:44:18,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:18,865 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:44:18,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18 WrapperNode [2020-08-21 15:44:18,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:18,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:44:18,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:44:18,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:44:18,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... [2020-08-21 15:44:18,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:44:18,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:44:18,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:44:18,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:44:18,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 15:44:19,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:44:19,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:44:19,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:44:19,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:44:19,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:44:19,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:44:19,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:44:19,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:44:19,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:44:19,324 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:44:19,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:19 BoogieIcfgContainer [2020-08-21 15:44:19,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:44:19,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:44:19,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:44:19,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:44:19,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:44:18" (1/3) ... [2020-08-21 15:44:19,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0b535e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:19, skipping insertion in model container [2020-08-21 15:44:19,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:18" (2/3) ... [2020-08-21 15:44:19,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0b535e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:19, skipping insertion in model container [2020-08-21 15:44:19,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:19" (3/3) ... [2020-08-21 15:44:19,339 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 15:44:19,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:44:19,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:44:19,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:44:19,407 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:44:19,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:44:19,408 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:44:19,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:44:19,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:44:19,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:44:19,408 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:44:19,408 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:44:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 15:44:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:44:19,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:19,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:19,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 15:44:19,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:19,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77287968] [2020-08-21 15:44:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:19,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77287968] [2020-08-21 15:44:19,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:19,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:19,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37698412] [2020-08-21 15:44:19,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:19,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:19,695 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 15:44:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:19,784 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 15:44:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:19,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 15:44:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:19,808 INFO L225 Difference]: With dead ends: 75 [2020-08-21 15:44:19,809 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 15:44:19,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 15:44:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 15:44:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 15:44:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 15:44:19,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 15:44:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:19,888 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 15:44:19,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 15:44:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:44:19,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:19,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:19,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:19,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:19,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 15:44:19,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:19,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453625689] [2020-08-21 15:44:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:19,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453625689] [2020-08-21 15:44:19,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:19,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:19,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003661407] [2020-08-21 15:44:19,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:19,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:19,981 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 15:44:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,011 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 15:44:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 15:44:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,014 INFO L225 Difference]: With dead ends: 97 [2020-08-21 15:44:20,014 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 15:44:20,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 15:44:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 15:44:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 15:44:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 15:44:20,026 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 15:44:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,026 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 15:44:20,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 15:44:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:44:20,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:44:20,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 15:44:20,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371521736] [2020-08-21 15:44:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371521736] [2020-08-21 15:44:20,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417034136] [2020-08-21 15:44:20,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,114 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 15:44:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,144 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 15:44:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 15:44:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,147 INFO L225 Difference]: With dead ends: 90 [2020-08-21 15:44:20,147 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 15:44:20,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 15:44:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 15:44:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 15:44:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 15:44:20,157 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 15:44:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,158 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 15:44:20,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 15:44:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:44:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:44:20,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 15:44:20,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964493878] [2020-08-21 15:44:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964493878] [2020-08-21 15:44:20,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390768892] [2020-08-21 15:44:20,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,205 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 15:44:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,225 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 15:44:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 15:44:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,228 INFO L225 Difference]: With dead ends: 112 [2020-08-21 15:44:20,228 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 15:44:20,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 15:44:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 15:44:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 15:44:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 15:44:20,240 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 15:44:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,241 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 15:44:20,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 15:44:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:44:20,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:44:20,245 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 15:44:20,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488484568] [2020-08-21 15:44:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488484568] [2020-08-21 15:44:20,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715871112] [2020-08-21 15:44:20,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,293 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 15:44:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,315 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 15:44:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 15:44:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,317 INFO L225 Difference]: With dead ends: 184 [2020-08-21 15:44:20,317 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 15:44:20,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 15:44:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 15:44:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 15:44:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 15:44:20,331 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 15:44:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,332 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 15:44:20,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 15:44:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:44:20,334 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 15:44:20,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269469097] [2020-08-21 15:44:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269469097] [2020-08-21 15:44:20,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132622456] [2020-08-21 15:44:20,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,393 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 15:44:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,412 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 15:44:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 15:44:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,415 INFO L225 Difference]: With dead ends: 165 [2020-08-21 15:44:20,415 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 15:44:20,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 15:44:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 15:44:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 15:44:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 15:44:20,429 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 15:44:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,430 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 15:44:20,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 15:44:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:20,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:44:20,432 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 15:44:20,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648626041] [2020-08-21 15:44:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648626041] [2020-08-21 15:44:20,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399130431] [2020-08-21 15:44:20,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,482 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 15:44:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,499 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 15:44:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 15:44:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,502 INFO L225 Difference]: With dead ends: 204 [2020-08-21 15:44:20,502 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 15:44:20,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 15:44:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 15:44:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 15:44:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 15:44:20,517 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 15:44:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,518 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 15:44:20,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 15:44:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:44:20,520 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 15:44:20,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304550309] [2020-08-21 15:44:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304550309] [2020-08-21 15:44:20,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253261561] [2020-08-21 15:44:20,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,559 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 15:44:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,581 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 15:44:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 15:44:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,583 INFO L225 Difference]: With dead ends: 352 [2020-08-21 15:44:20,583 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 15:44:20,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 15:44:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 15:44:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 15:44:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 15:44:20,600 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 15:44:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,600 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 15:44:20,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 15:44:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:20,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:44:20,603 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 15:44:20,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380763518] [2020-08-21 15:44:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380763518] [2020-08-21 15:44:20,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768166837] [2020-08-21 15:44:20,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,630 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 15:44:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,648 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 15:44:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,650 INFO L225 Difference]: With dead ends: 312 [2020-08-21 15:44:20,650 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 15:44:20,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 15:44:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 15:44:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 15:44:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 15:44:20,665 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 15:44:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,665 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 15:44:20,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 15:44:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:20,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:44:20,668 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 15:44:20,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773162683] [2020-08-21 15:44:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773162683] [2020-08-21 15:44:20,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681276168] [2020-08-21 15:44:20,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,704 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 15:44:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,728 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 15:44:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,734 INFO L225 Difference]: With dead ends: 380 [2020-08-21 15:44:20,734 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 15:44:20,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 15:44:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 15:44:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 15:44:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 15:44:20,749 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 15:44:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,749 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 15:44:20,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 15:44:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:20,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:44:20,752 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 15:44:20,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984392895] [2020-08-21 15:44:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984392895] [2020-08-21 15:44:20,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945477480] [2020-08-21 15:44:20,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,787 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 15:44:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,810 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 15:44:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,814 INFO L225 Difference]: With dead ends: 684 [2020-08-21 15:44:20,814 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 15:44:20,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 15:44:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 15:44:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 15:44:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 15:44:20,830 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 15:44:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,830 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 15:44:20,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 15:44:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:20,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:44:20,832 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 15:44:20,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300298456] [2020-08-21 15:44:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300298456] [2020-08-21 15:44:20,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891382446] [2020-08-21 15:44:20,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,857 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 15:44:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,876 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 15:44:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,879 INFO L225 Difference]: With dead ends: 600 [2020-08-21 15:44:20,879 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 15:44:20,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 15:44:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 15:44:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 15:44:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 15:44:20,894 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 15:44:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,895 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 15:44:20,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 15:44:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:20,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:44:20,897 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 15:44:20,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584463708] [2020-08-21 15:44:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:20,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584463708] [2020-08-21 15:44:20,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:20,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:20,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876770184] [2020-08-21 15:44:20,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:20,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:20,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:20,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,922 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 15:44:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:20,964 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 15:44:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:20,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:20,969 INFO L225 Difference]: With dead ends: 716 [2020-08-21 15:44:20,970 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 15:44:20,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 15:44:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 15:44:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 15:44:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 15:44:20,990 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 15:44:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:20,991 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 15:44:20,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 15:44:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:20,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:20,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:20,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:44:20,993 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 15:44:20,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:20,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932889293] [2020-08-21 15:44:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932889293] [2020-08-21 15:44:21,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982691608] [2020-08-21 15:44:21,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,040 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 15:44:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,077 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 15:44:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,083 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 15:44:21,084 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 15:44:21,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 15:44:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 15:44:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 15:44:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 15:44:21,115 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 15:44:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,116 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 15:44:21,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 15:44:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:21,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:44:21,118 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 15:44:21,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110176411] [2020-08-21 15:44:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110176411] [2020-08-21 15:44:21,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218046017] [2020-08-21 15:44:21,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,157 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 15:44:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,186 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 15:44:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,191 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 15:44:21,191 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 15:44:21,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 15:44:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 15:44:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 15:44:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 15:44:21,230 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 15:44:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,230 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 15:44:21,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 15:44:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:21,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 15:44:21,232 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 15:44:21,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473588500] [2020-08-21 15:44:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473588500] [2020-08-21 15:44:21,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904010056] [2020-08-21 15:44:21,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,269 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 15:44:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,304 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 15:44:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,311 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 15:44:21,311 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 15:44:21,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 15:44:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 15:44:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 15:44:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 15:44:21,354 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 15:44:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,355 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 15:44:21,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 15:44:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:21,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 15:44:21,358 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 15:44:21,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143477236] [2020-08-21 15:44:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143477236] [2020-08-21 15:44:21,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241564306] [2020-08-21 15:44:21,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,388 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 15:44:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,431 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 15:44:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,439 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 15:44:21,439 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 15:44:21,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 15:44:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 15:44:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 15:44:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 15:44:21,507 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 15:44:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,509 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 15:44:21,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 15:44:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:21,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 15:44:21,514 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 15:44:21,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268720317] [2020-08-21 15:44:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268720317] [2020-08-21 15:44:21,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232058159] [2020-08-21 15:44:21,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,561 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 15:44:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,621 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 15:44:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,631 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 15:44:21,631 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 15:44:21,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 15:44:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 15:44:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 15:44:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 15:44:21,711 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 15:44:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,712 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 15:44:21,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 15:44:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 15:44:21,715 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 15:44:21,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380707205] [2020-08-21 15:44:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380707205] [2020-08-21 15:44:21,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813411224] [2020-08-21 15:44:21,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,759 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 15:44:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:21,836 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 15:44:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:21,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:21,852 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 15:44:21,852 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 15:44:21,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 15:44:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 15:44:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 15:44:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 15:44:21,943 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 15:44:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:21,944 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 15:44:21,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 15:44:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:21,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 15:44:21,948 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 15:44:21,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241074986] [2020-08-21 15:44:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241074986] [2020-08-21 15:44:21,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343595829] [2020-08-21 15:44:21,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,968 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 15:44:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,043 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 15:44:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:22,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,057 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 15:44:22,057 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 15:44:22,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 15:44:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 15:44:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 15:44:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 15:44:22,150 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 15:44:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,151 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 15:44:22,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 15:44:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:22,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 15:44:22,156 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,156 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 15:44:22,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968799165] [2020-08-21 15:44:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:22,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968799165] [2020-08-21 15:44:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:22,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124787128] [2020-08-21 15:44:22,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:22,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,176 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 15:44:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,236 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 15:44:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:22,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,249 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 15:44:22,250 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 15:44:22,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 15:44:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 15:44:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 15:44:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 15:44:22,364 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 15:44:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,364 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 15:44:22,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 15:44:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:22,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 15:44:22,370 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 15:44:22,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151679869] [2020-08-21 15:44:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:22,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151679869] [2020-08-21 15:44:22,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:22,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:22,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067175562] [2020-08-21 15:44:22,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:22,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:22,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:22,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,393 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 15:44:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,491 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 15:44:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:22,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,505 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 15:44:22,505 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 15:44:22,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 15:44:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 15:44:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 15:44:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 15:44:22,612 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 15:44:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,612 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 15:44:22,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 15:44:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:22,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 15:44:22,617 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 15:44:22,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19852462] [2020-08-21 15:44:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:22,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19852462] [2020-08-21 15:44:22,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:22,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:22,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024329992] [2020-08-21 15:44:22,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:22,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,637 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 15:44:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,681 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 15:44:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:22,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,682 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 15:44:22,682 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:44:22,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:44:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:44:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:44:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:44:22,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 15:44:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,688 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:44:22,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:44:22,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:44:22,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 15:44:22,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:44:22,713 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 15:44:22,713 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:44:22,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:44:22,714 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 15:44:22,714 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:44:22,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:44:22,714 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 15:44:22,714 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 15:44:22,714 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 15:44:22,715 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,716 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 15:44:22,717 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,718 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 15:44:22,718 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,718 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,718 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 15:44:22,718 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 15:44:22,718 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 15:44:22,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:22 BoogieIcfgContainer [2020-08-21 15:44:22,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:22,733 INFO L168 Benchmark]: Toolchain (without parser) took 4137.31 ms. Allocated memory was 143.1 MB in the beginning and 277.3 MB in the end (delta: 134.2 MB). Free memory was 105.6 MB in the beginning and 129.0 MB in the end (delta: -23.3 MB). Peak memory consumption was 110.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:22,734 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:44:22,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.02 ms. Allocated memory is still 143.1 MB. Free memory was 105.4 MB in the beginning and 94.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:22,735 INFO L168 Benchmark]: Boogie Preprocessor took 118.09 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:22,735 INFO L168 Benchmark]: RCFGBuilder took 341.29 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 165.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:22,736 INFO L168 Benchmark]: TraceAbstraction took 3399.16 ms. Allocated memory was 205.0 MB in the beginning and 277.3 MB in the end (delta: 72.4 MB). Free memory was 164.7 MB in the beginning and 129.0 MB in the end (delta: 35.7 MB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:22,739 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.02 ms. Allocated memory is still 143.1 MB. Free memory was 105.4 MB in the beginning and 94.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.09 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.29 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 165.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3399.16 ms. Allocated memory was 205.0 MB in the beginning and 277.3 MB in the end (delta: 72.4 MB). Free memory was 164.7 MB in the beginning and 129.0 MB in the end (delta: 35.7 MB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...