/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:09:25,229 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 01:09:25,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:09:25,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:09:25,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:09:25,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:09:25,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:09:25,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:09:25,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:09:25,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:09:25,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:09:25,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:09:25,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:09:25,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:09:25,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:09:25,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:09:25,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:09:25,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:09:25,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:09:25,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:09:25,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:09:25,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:09:25,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:09:25,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:09:25,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:09:25,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:09:25,327 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 [2020-08-19 01:09:25,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:09:25,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:09:25,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:09:25,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:09:25,352 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:09:25,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:09:25,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:09:25,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:09:25,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:09:25,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:09:25,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:09:25,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:09:25,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:09:25,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:09:25,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:09:25,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:09:25,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:09:25,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:09:25,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:09:25,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:09:25,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:09:25,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:09:25,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:09:25,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:09:25,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:09:25,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:09:25,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:09:25,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:09:25,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:09:25,357 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:09:25,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:09:25,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:09:25,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:09:25,705 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:09:25,707 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:09:25,707 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 01:09:25,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fad56415/62df7a168d7b4b82bf426639697d79b6/FLAGf93af7a4c [2020-08-19 01:09:26,295 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:09:26,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 01:09:26,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fad56415/62df7a168d7b4b82bf426639697d79b6/FLAGf93af7a4c [2020-08-19 01:09:26,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fad56415/62df7a168d7b4b82bf426639697d79b6 [2020-08-19 01:09:26,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:09:26,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:09:26,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:09:26,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:09:26,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:09:26,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:26,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4757cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26, skipping insertion in model container [2020-08-19 01:09:26,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:26,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:09:26,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:09:26,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:09:26,957 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:09:26,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:09:26,999 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:09:27,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26 WrapperNode [2020-08-19 01:09:27,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:09:27,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:09:27,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:09:27,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:09:27,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (1/1) ... [2020-08-19 01:09:27,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:09:27,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:09:27,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:09:27,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:09:27,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (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 [2020-08-19 01:09:27,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:09:27,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:09:27,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:09:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:09:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:09:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:09:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:09:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:09:27,484 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:09:27,485 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:09:27,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:09:27 BoogieIcfgContainer [2020-08-19 01:09:27,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:09:27,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:09:27,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:09:27,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:09:27,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:09:26" (1/3) ... [2020-08-19 01:09:27,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d2d1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:09:27, skipping insertion in model container [2020-08-19 01:09:27,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:26" (2/3) ... [2020-08-19 01:09:27,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d2d1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:09:27, skipping insertion in model container [2020-08-19 01:09:27,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:09:27" (3/3) ... [2020-08-19 01:09:27,502 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-19 01:09:27,513 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:09:27,522 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:09:27,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:09:27,566 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:09:27,566 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:09:27,566 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:09:27,566 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:09:27,567 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:09:27,567 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:09:27,567 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:09:27,568 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:09:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-19 01:09:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:09:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:27,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:27,598 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-19 01:09:27,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:27,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800681592] [2020-08-19 01:09:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:27,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800681592] [2020-08-19 01:09:27,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:27,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:27,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552019962] [2020-08-19 01:09:27,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:27,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:27,881 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-19 01:09:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:27,961 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-19 01:09:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:27,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 01:09:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:27,974 INFO L225 Difference]: With dead ends: 81 [2020-08-19 01:09:27,975 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 01:09:27,978 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 [2020-08-19 01:09:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 01:09:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-19 01:09:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:09:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-19 01:09:28,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-19 01:09:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,030 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-19 01:09:28,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-19 01:09:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:09:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:28,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:09:28,032 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-19 01:09:28,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587529556] [2020-08-19 01:09:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587529556] [2020-08-19 01:09:28,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060266126] [2020-08-19 01:09:28,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,097 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-19 01:09:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,126 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-19 01:09:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 01:09:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,129 INFO L225 Difference]: With dead ends: 107 [2020-08-19 01:09:28,129 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 01:09:28,131 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 [2020-08-19 01:09:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 01:09:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-19 01:09:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 01:09:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-19 01:09:28,142 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-19 01:09:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,143 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-19 01:09:28,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-19 01:09:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:09:28,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,145 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] [2020-08-19 01:09:28,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:09:28,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-19 01:09:28,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854667919] [2020-08-19 01:09:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854667919] [2020-08-19 01:09:28,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300857695] [2020-08-19 01:09:28,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,209 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-19 01:09:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,242 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-19 01:09:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:09:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,247 INFO L225 Difference]: With dead ends: 99 [2020-08-19 01:09:28,247 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 01:09:28,248 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 [2020-08-19 01:09:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 01:09:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-19 01:09:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 01:09:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-19 01:09:28,259 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-19 01:09:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,259 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-19 01:09:28,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-19 01:09:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:09:28,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,261 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] [2020-08-19 01:09:28,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:09:28,262 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-19 01:09:28,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400438795] [2020-08-19 01:09:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400438795] [2020-08-19 01:09:28,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835840438] [2020-08-19 01:09:28,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,327 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-19 01:09:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,360 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-19 01:09:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:09:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,363 INFO L225 Difference]: With dead ends: 124 [2020-08-19 01:09:28,363 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 01:09:28,364 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 [2020-08-19 01:09:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 01:09:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-19 01:09:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 01:09:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-19 01:09:28,377 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-19 01:09:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,378 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-19 01:09:28,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-19 01:09:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:09:28,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,380 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] [2020-08-19 01:09:28,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:09:28,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-19 01:09:28,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739809133] [2020-08-19 01:09:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739809133] [2020-08-19 01:09:28,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8764555] [2020-08-19 01:09:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,424 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-19 01:09:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,451 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-19 01:09:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:09:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,454 INFO L225 Difference]: With dead ends: 204 [2020-08-19 01:09:28,454 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 01:09:28,456 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 [2020-08-19 01:09:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 01:09:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-19 01:09:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-19 01:09:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-19 01:09:28,470 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-19 01:09:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,470 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-19 01:09:28,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-19 01:09:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,472 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] [2020-08-19 01:09:28,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:09:28,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-19 01:09:28,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197824433] [2020-08-19 01:09:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197824433] [2020-08-19 01:09:28,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652422751] [2020-08-19 01:09:28,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,512 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-19 01:09:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,534 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-19 01:09:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,537 INFO L225 Difference]: With dead ends: 183 [2020-08-19 01:09:28,537 INFO L226 Difference]: Without dead ends: 126 [2020-08-19 01:09:28,538 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 [2020-08-19 01:09:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-19 01:09:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-19 01:09:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-19 01:09:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-19 01:09:28,556 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-19 01:09:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,556 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-19 01:09:28,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-19 01:09:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:28,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,558 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] [2020-08-19 01:09:28,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:09:28,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-19 01:09:28,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979131914] [2020-08-19 01:09:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979131914] [2020-08-19 01:09:28,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101796607] [2020-08-19 01:09:28,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,621 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-19 01:09:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,656 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-19 01:09:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,658 INFO L225 Difference]: With dead ends: 228 [2020-08-19 01:09:28,659 INFO L226 Difference]: Without dead ends: 226 [2020-08-19 01:09:28,659 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 [2020-08-19 01:09:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-19 01:09:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-19 01:09:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 01:09:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-19 01:09:28,672 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-19 01:09:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,673 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-19 01:09:28,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-19 01:09:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:28,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,675 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] [2020-08-19 01:09:28,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:09:28,675 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-19 01:09:28,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418768799] [2020-08-19 01:09:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418768799] [2020-08-19 01:09:28,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768423368] [2020-08-19 01:09:28,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,712 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-19 01:09:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,733 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-19 01:09:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,735 INFO L225 Difference]: With dead ends: 392 [2020-08-19 01:09:28,735 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 01:09:28,737 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 [2020-08-19 01:09:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 01:09:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-19 01:09:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-19 01:09:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-19 01:09:28,752 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-19 01:09:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,753 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-19 01:09:28,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-19 01:09:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:28,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,755 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] [2020-08-19 01:09:28,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:09:28,756 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-19 01:09:28,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411194350] [2020-08-19 01:09:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411194350] [2020-08-19 01:09:28,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833800170] [2020-08-19 01:09:28,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,813 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-19 01:09:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,843 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-19 01:09:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,847 INFO L225 Difference]: With dead ends: 348 [2020-08-19 01:09:28,848 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 01:09:28,849 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 [2020-08-19 01:09:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 01:09:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-19 01:09:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-19 01:09:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-19 01:09:28,872 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-19 01:09:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,872 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-19 01:09:28,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-19 01:09:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:28,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,875 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] [2020-08-19 01:09:28,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:09:28,875 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-19 01:09:28,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905731743] [2020-08-19 01:09:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905731743] [2020-08-19 01:09:28,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132013403] [2020-08-19 01:09:28,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,909 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-19 01:09:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:28,930 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-19 01:09:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:28,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:28,934 INFO L225 Difference]: With dead ends: 428 [2020-08-19 01:09:28,934 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 01:09:28,935 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 [2020-08-19 01:09:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 01:09:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-19 01:09:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-19 01:09:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-19 01:09:28,949 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-19 01:09:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:28,950 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-19 01:09:28,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-19 01:09:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:28,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:28,952 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] [2020-08-19 01:09:28,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:09:28,952 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-19 01:09:28,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:28,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519633424] [2020-08-19 01:09:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:28,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519633424] [2020-08-19 01:09:28,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:28,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:28,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814126137] [2020-08-19 01:09:28,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:28,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:28,990 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-19 01:09:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,050 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-19 01:09:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,055 INFO L225 Difference]: With dead ends: 764 [2020-08-19 01:09:29,055 INFO L226 Difference]: Without dead ends: 450 [2020-08-19 01:09:29,058 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 [2020-08-19 01:09:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-19 01:09:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-19 01:09:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-19 01:09:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-19 01:09:29,088 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-19 01:09:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,090 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-19 01:09:29,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-19 01:09:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:29,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,092 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] [2020-08-19 01:09:29,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:09:29,092 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-19 01:09:29,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970571007] [2020-08-19 01:09:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970571007] [2020-08-19 01:09:29,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382783840] [2020-08-19 01:09:29,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,161 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-19 01:09:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,191 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-19 01:09:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,195 INFO L225 Difference]: With dead ends: 672 [2020-08-19 01:09:29,195 INFO L226 Difference]: Without dead ends: 458 [2020-08-19 01:09:29,197 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 [2020-08-19 01:09:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-19 01:09:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-19 01:09:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-19 01:09:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-19 01:09:29,220 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-19 01:09:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,220 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-19 01:09:29,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-19 01:09:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:29,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,225 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] [2020-08-19 01:09:29,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:09:29,232 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-19 01:09:29,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132082331] [2020-08-19 01:09:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132082331] [2020-08-19 01:09:29,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050410456] [2020-08-19 01:09:29,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,289 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-19 01:09:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,317 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-19 01:09:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,324 INFO L225 Difference]: With dead ends: 812 [2020-08-19 01:09:29,325 INFO L226 Difference]: Without dead ends: 810 [2020-08-19 01:09:29,325 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 [2020-08-19 01:09:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-19 01:09:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-19 01:09:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-19 01:09:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-19 01:09:29,348 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-19 01:09:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,350 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-19 01:09:29,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-19 01:09:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:29,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,352 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] [2020-08-19 01:09:29,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:09:29,352 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-19 01:09:29,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991870960] [2020-08-19 01:09:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991870960] [2020-08-19 01:09:29,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932385753] [2020-08-19 01:09:29,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,385 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-19 01:09:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,415 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-19 01:09:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,420 INFO L225 Difference]: With dead ends: 1500 [2020-08-19 01:09:29,420 INFO L226 Difference]: Without dead ends: 874 [2020-08-19 01:09:29,422 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 [2020-08-19 01:09:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-19 01:09:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-19 01:09:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-19 01:09:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-19 01:09:29,455 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-19 01:09:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,455 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-19 01:09:29,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-19 01:09:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:29,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,457 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] [2020-08-19 01:09:29,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:09:29,458 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-19 01:09:29,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199362558] [2020-08-19 01:09:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199362558] [2020-08-19 01:09:29,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899603214] [2020-08-19 01:09:29,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,487 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-19 01:09:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,516 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-19 01:09:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,521 INFO L225 Difference]: With dead ends: 1308 [2020-08-19 01:09:29,521 INFO L226 Difference]: Without dead ends: 890 [2020-08-19 01:09:29,523 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 [2020-08-19 01:09:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-19 01:09:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-19 01:09:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-19 01:09:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-19 01:09:29,552 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-19 01:09:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,553 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-19 01:09:29,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-19 01:09:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:29,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,555 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] [2020-08-19 01:09:29,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:09:29,555 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-19 01:09:29,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22510281] [2020-08-19 01:09:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22510281] [2020-08-19 01:09:29,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988590456] [2020-08-19 01:09:29,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,599 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-19 01:09:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,633 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-19 01:09:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,640 INFO L225 Difference]: With dead ends: 1548 [2020-08-19 01:09:29,640 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 01:09:29,641 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 [2020-08-19 01:09:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 01:09:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-19 01:09:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-19 01:09:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-19 01:09:29,679 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-19 01:09:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,679 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-19 01:09:29,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-19 01:09:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:29,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,682 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] [2020-08-19 01:09:29,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:09:29,682 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-19 01:09:29,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792325987] [2020-08-19 01:09:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792325987] [2020-08-19 01:09:29,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272135019] [2020-08-19 01:09:29,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,706 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-19 01:09:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,747 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-19 01:09:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,756 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 01:09:29,757 INFO L226 Difference]: Without dead ends: 1706 [2020-08-19 01:09:29,760 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 [2020-08-19 01:09:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-19 01:09:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-19 01:09:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-19 01:09:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-19 01:09:29,814 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-19 01:09:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,814 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-19 01:09:29,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-19 01:09:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:29,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:29,818 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] [2020-08-19 01:09:29,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 01:09:29,819 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-19 01:09:29,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:29,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167954721] [2020-08-19 01:09:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:29,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167954721] [2020-08-19 01:09:29,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:29,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:29,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186983625] [2020-08-19 01:09:29,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:29,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:29,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:29,849 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-19 01:09:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:29,907 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-19 01:09:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:29,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:29,919 INFO L225 Difference]: With dead ends: 2556 [2020-08-19 01:09:29,919 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 01:09:29,921 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 [2020-08-19 01:09:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 01:09:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-19 01:09:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-19 01:09:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-19 01:09:29,996 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-19 01:09:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:29,996 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-19 01:09:29,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-19 01:09:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:30,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:30,001 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] [2020-08-19 01:09:30,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 01:09:30,002 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-19 01:09:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:30,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837227525] [2020-08-19 01:09:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:30,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837227525] [2020-08-19 01:09:30,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:30,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:30,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479363194] [2020-08-19 01:09:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:30,047 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-19 01:09:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:30,130 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-19 01:09:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:30,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:30,149 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 01:09:30,150 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 01:09:30,151 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 [2020-08-19 01:09:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 01:09:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-19 01:09:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-19 01:09:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-19 01:09:30,290 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-19 01:09:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:30,290 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-19 01:09:30,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-19 01:09:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:30,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:30,297 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] [2020-08-19 01:09:30,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 01:09:30,298 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-19 01:09:30,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:30,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118552556] [2020-08-19 01:09:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:30,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118552556] [2020-08-19 01:09:30,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:30,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:30,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70536801] [2020-08-19 01:09:30,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:30,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:30,339 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-19 01:09:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:30,420 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-19 01:09:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:30,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:30,436 INFO L225 Difference]: With dead ends: 5836 [2020-08-19 01:09:30,436 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 01:09:30,442 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 [2020-08-19 01:09:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 01:09:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-19 01:09:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-19 01:09:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-19 01:09:30,553 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-19 01:09:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:30,553 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-19 01:09:30,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-19 01:09:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:30,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:30,559 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, 1] [2020-08-19 01:09:30,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 01:09:30,562 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-19 01:09:30,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:30,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569417793] [2020-08-19 01:09:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:30,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569417793] [2020-08-19 01:09:30,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:30,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:30,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443640674] [2020-08-19 01:09:30,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:30,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:30,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:30,588 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-19 01:09:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:30,663 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-19 01:09:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:30,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:30,680 INFO L225 Difference]: With dead ends: 5004 [2020-08-19 01:09:30,681 INFO L226 Difference]: Without dead ends: 3402 [2020-08-19 01:09:30,685 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 [2020-08-19 01:09:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-19 01:09:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-19 01:09:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-19 01:09:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-19 01:09:30,848 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-19 01:09:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:30,849 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-19 01:09:30,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-19 01:09:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:30,855 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, 1] [2020-08-19 01:09:30,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 01:09:30,855 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-19 01:09:30,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:30,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607814557] [2020-08-19 01:09:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:30,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607814557] [2020-08-19 01:09:30,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:30,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:30,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060346032] [2020-08-19 01:09:30,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:30,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:30,901 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-19 01:09:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:31,091 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-19 01:09:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:31,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:31,157 INFO L225 Difference]: With dead ends: 9804 [2020-08-19 01:09:31,157 INFO L226 Difference]: Without dead ends: 6538 [2020-08-19 01:09:31,175 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 [2020-08-19 01:09:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-19 01:09:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-19 01:09:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 01:09:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-19 01:09:31,395 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-19 01:09:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:31,396 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-19 01:09:31,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-19 01:09:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:31,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:31,406 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, 1] [2020-08-19 01:09:31,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 01:09:31,406 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-19 01:09:31,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:31,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237545011] [2020-08-19 01:09:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:31,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:31,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237545011] [2020-08-19 01:09:31,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:31,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:31,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553877786] [2020-08-19 01:09:31,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:31,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:31,437 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-19 01:09:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:31,614 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-19 01:09:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:31,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:31,634 INFO L225 Difference]: With dead ends: 7052 [2020-08-19 01:09:31,635 INFO L226 Difference]: Without dead ends: 7050 [2020-08-19 01:09:31,638 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 [2020-08-19 01:09:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-19 01:09:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-19 01:09:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 01:09:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-19 01:09:31,952 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-19 01:09:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:31,953 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-19 01:09:31,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-19 01:09:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:09:31,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:31,964 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, 1, 1] [2020-08-19 01:09:31,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 01:09:31,965 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:31,965 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-19 01:09:31,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:31,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496303227] [2020-08-19 01:09:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:31,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496303227] [2020-08-19 01:09:31,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:31,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:31,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980047653] [2020-08-19 01:09:31,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:31,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:31,997 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-19 01:09:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:32,188 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-19 01:09:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:32,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:09:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:32,210 INFO L225 Difference]: With dead ends: 10634 [2020-08-19 01:09:32,211 INFO L226 Difference]: Without dead ends: 10632 [2020-08-19 01:09:32,215 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 [2020-08-19 01:09:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-19 01:09:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-19 01:09:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-19 01:09:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-19 01:09:32,550 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-19 01:09:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:32,550 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-19 01:09:32,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-19 01:09:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:09:32,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:32,571 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, 1, 1] [2020-08-19 01:09:32,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 01:09:32,572 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-19 01:09:32,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:32,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816359473] [2020-08-19 01:09:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:32,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:09:32,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816359473] [2020-08-19 01:09:32,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:32,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:32,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173258710] [2020-08-19 01:09:32,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:32,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:32,623 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-19 01:09:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:32,847 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-19 01:09:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:32,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:09:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:32,848 INFO L225 Difference]: With dead ends: 22664 [2020-08-19 01:09:32,848 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:09:32,883 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 [2020-08-19 01:09:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:09:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:09:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:09:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:09:32,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-19 01:09:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:32,884 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:09:32,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:09:32,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:09:32,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 01:09:32,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:09:32,910 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:09:32,911 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:09:32,911 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:09:32,911 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:09:32,911 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:09:32,911 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:09:32,911 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,912 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,913 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-19 01:09:32,914 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,914 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-19 01:09:32,915 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,915 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,916 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-19 01:09:32,916 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-19 01:09:32,916 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,916 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 01:09:32,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:09:32 BoogieIcfgContainer [2020-08-19 01:09:32,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:09:32,931 INFO L168 Benchmark]: Toolchain (without parser) took 6243.45 ms. Allocated memory was 138.9 MB in the beginning and 362.8 MB in the end (delta: 223.9 MB). Free memory was 101.7 MB in the beginning and 146.4 MB in the end (delta: -44.7 MB). Peak memory consumption was 179.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:32,932 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:09:32,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.14 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:32,933 INFO L168 Benchmark]: Boogie Preprocessor took 135.75 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 180.4 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:32,934 INFO L168 Benchmark]: RCFGBuilder took 353.38 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 161.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:32,934 INFO L168 Benchmark]: TraceAbstraction took 5436.19 ms. Allocated memory was 202.4 MB in the beginning and 362.8 MB in the end (delta: 160.4 MB). Free memory was 161.2 MB in the beginning and 146.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 175.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:32,937 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.14 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.75 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 180.4 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.38 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 161.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5436.19 ms. Allocated memory was 202.4 MB in the beginning and 362.8 MB in the end (delta: 160.4 MB). Free memory was 161.2 MB in the beginning and 146.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 175.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 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, 0.7s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...