/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:36:32,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:36:32,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:36:32,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 00:36:32,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:36:32,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:36:32,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:36:32,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:36:32,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:36:32,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:36:32,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:36:32,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:36:32,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:36:32,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:36:32,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:36:32,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:36:32,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:36:32,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:36:32,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:36:32,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:36:32,927 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 [2020-08-22 00:36:32,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:36:32,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:36:32,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:36:32,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:36:32,982 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:36:32,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:36:32,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:36:32,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:36:32,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:36:32,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:36:32,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:36:32,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:36:32,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:36:32,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:36:32,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:36:32,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:36:32,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:36:32,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:36:32,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:36:32,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:36:33,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:36:33,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:36:33,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:36:33,317 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:36:33,317 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:36:33,318 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 00:36:33,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656564b2b/cac1cb46a8fc4025b1dbd733883d2f5e/FLAG2cdaa91eb [2020-08-22 00:36:33,847 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:36:33,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 00:36:33,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656564b2b/cac1cb46a8fc4025b1dbd733883d2f5e/FLAG2cdaa91eb [2020-08-22 00:36:34,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656564b2b/cac1cb46a8fc4025b1dbd733883d2f5e [2020-08-22 00:36:34,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:36:34,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:36:34,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:34,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:36:34,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:36:34,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9c66bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34, skipping insertion in model container [2020-08-22 00:36:34,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:36:34,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:36:34,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:34,469 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:36:34,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:34,506 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:36:34,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34 WrapperNode [2020-08-22 00:36:34,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:34,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:36:34,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:36:34,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:36:34,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (1/1) ... [2020-08-22 00:36:34,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:36:34,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:36:34,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:36:34,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:36:34,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (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 [2020-08-22 00:36:34,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:36:34,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:36:34,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:36:34,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:36:34,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:36:34,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:36:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:36:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:36:34,991 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:36:34,992 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 00:36:34,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:34 BoogieIcfgContainer [2020-08-22 00:36:34,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:36:34,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:36:34,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:36:35,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:36:35,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:36:34" (1/3) ... [2020-08-22 00:36:35,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e1a789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:35, skipping insertion in model container [2020-08-22 00:36:35,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:34" (2/3) ... [2020-08-22 00:36:35,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e1a789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:35, skipping insertion in model container [2020-08-22 00:36:35,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:34" (3/3) ... [2020-08-22 00:36:35,006 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-22 00:36:35,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:36:35,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:36:35,049 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:36:35,083 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:36:35,083 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:36:35,083 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:36:35,083 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:36:35,084 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:36:35,084 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:36:35,084 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:36:35,084 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:36:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-22 00:36:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 00:36:35,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,115 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-22 00:36:35,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890595004] [2020-08-22 00:36:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890595004] [2020-08-22 00:36:35,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691976532] [2020-08-22 00:36:35,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,354 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-22 00:36:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,405 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-22 00:36:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 00:36:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,420 INFO L225 Difference]: With dead ends: 63 [2020-08-22 00:36:35,421 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 00:36:35,425 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 [2020-08-22 00:36:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 00:36:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-22 00:36:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 00:36:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-22 00:36:35,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-22 00:36:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,471 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-22 00:36:35,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-22 00:36:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 00:36:35,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:36:35,473 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-22 00:36:35,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411827251] [2020-08-22 00:36:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411827251] [2020-08-22 00:36:35,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254365263] [2020-08-22 00:36:35,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,534 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-22 00:36:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,563 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-22 00:36:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 00:36:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,566 INFO L225 Difference]: With dead ends: 77 [2020-08-22 00:36:35,566 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 00:36:35,568 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 [2020-08-22 00:36:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 00:36:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-22 00:36:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 00:36:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-22 00:36:35,577 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-22 00:36:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,578 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-22 00:36:35,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-22 00:36:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 00:36:35,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:36:35,580 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-22 00:36:35,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975610299] [2020-08-22 00:36:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975610299] [2020-08-22 00:36:35,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320377894] [2020-08-22 00:36:35,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,638 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-22 00:36:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,677 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-22 00:36:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 00:36:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,679 INFO L225 Difference]: With dead ends: 72 [2020-08-22 00:36:35,679 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 00:36:35,680 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 [2020-08-22 00:36:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 00:36:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-22 00:36:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 00:36:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-22 00:36:35,689 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-22 00:36:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,690 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-22 00:36:35,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-22 00:36:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 00:36:35,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:36:35,692 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-22 00:36:35,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571916252] [2020-08-22 00:36:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571916252] [2020-08-22 00:36:35,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28029995] [2020-08-22 00:36:35,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,740 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-22 00:36:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,762 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-22 00:36:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 00:36:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,765 INFO L225 Difference]: With dead ends: 88 [2020-08-22 00:36:35,765 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 00:36:35,766 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 [2020-08-22 00:36:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 00:36:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-22 00:36:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 00:36:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-22 00:36:35,777 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-22 00:36:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,778 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-22 00:36:35,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-22 00:36:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 00:36:35,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:36:35,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-22 00:36:35,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035520874] [2020-08-22 00:36:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035520874] [2020-08-22 00:36:35,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433295003] [2020-08-22 00:36:35,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,819 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-22 00:36:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,846 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-22 00:36:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 00:36:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,848 INFO L225 Difference]: With dead ends: 144 [2020-08-22 00:36:35,848 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 00:36:35,849 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 [2020-08-22 00:36:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 00:36:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-22 00:36:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-22 00:36:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-22 00:36:35,861 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-22 00:36:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,862 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-22 00:36:35,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-22 00:36:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:36:35,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:36:35,864 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-22 00:36:35,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476903884] [2020-08-22 00:36:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476903884] [2020-08-22 00:36:35,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067722665] [2020-08-22 00:36:35,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,900 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-22 00:36:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,919 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-22 00:36:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 00:36:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,921 INFO L225 Difference]: With dead ends: 129 [2020-08-22 00:36:35,921 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 00:36:35,922 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 [2020-08-22 00:36:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 00:36:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-22 00:36:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 00:36:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-22 00:36:35,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-22 00:36:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:35,937 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-22 00:36:35,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-22 00:36:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:36:35,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:35,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:35,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:36:35,939 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-22 00:36:35,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:35,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678329219] [2020-08-22 00:36:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678329219] [2020-08-22 00:36:35,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:35,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:35,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033595063] [2020-08-22 00:36:35,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:35,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:35,976 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-22 00:36:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:35,995 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-22 00:36:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:35,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 00:36:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:35,997 INFO L225 Difference]: With dead ends: 156 [2020-08-22 00:36:35,998 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 00:36:35,998 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 [2020-08-22 00:36:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 00:36:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-22 00:36:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 00:36:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-22 00:36:36,014 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-22 00:36:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,014 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-22 00:36:36,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-22 00:36:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:36:36,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:36,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:36:36,017 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-22 00:36:36,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654941862] [2020-08-22 00:36:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654941862] [2020-08-22 00:36:36,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258391571] [2020-08-22 00:36:36,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,069 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-22 00:36:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,091 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-22 00:36:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 00:36:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,093 INFO L225 Difference]: With dead ends: 272 [2020-08-22 00:36:36,095 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 00:36:36,096 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 [2020-08-22 00:36:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 00:36:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-22 00:36:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 00:36:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-22 00:36:36,113 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-22 00:36:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,114 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-22 00:36:36,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-22 00:36:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:36,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:36,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:36:36,116 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-22 00:36:36,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771893649] [2020-08-22 00:36:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771893649] [2020-08-22 00:36:36,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594617679] [2020-08-22 00:36:36,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,148 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-22 00:36:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,182 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-22 00:36:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,186 INFO L225 Difference]: With dead ends: 240 [2020-08-22 00:36:36,186 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 00:36:36,187 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 [2020-08-22 00:36:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 00:36:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-22 00:36:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-22 00:36:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-22 00:36:36,218 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-22 00:36:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,219 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-22 00:36:36,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-22 00:36:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:36,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:36,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:36:36,224 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-22 00:36:36,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248096140] [2020-08-22 00:36:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248096140] [2020-08-22 00:36:36,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329438366] [2020-08-22 00:36:36,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,282 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-22 00:36:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,310 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-22 00:36:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,316 INFO L225 Difference]: With dead ends: 284 [2020-08-22 00:36:36,316 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 00:36:36,316 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 [2020-08-22 00:36:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 00:36:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-22 00:36:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 00:36:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-22 00:36:36,330 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-22 00:36:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,330 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-22 00:36:36,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-22 00:36:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:36,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:36,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:36:36,336 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-22 00:36:36,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49612541] [2020-08-22 00:36:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49612541] [2020-08-22 00:36:36,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857538440] [2020-08-22 00:36:36,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,365 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-22 00:36:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,388 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-22 00:36:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,390 INFO L225 Difference]: With dead ends: 524 [2020-08-22 00:36:36,391 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 00:36:36,392 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 [2020-08-22 00:36:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 00:36:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-22 00:36:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 00:36:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-22 00:36:36,405 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-22 00:36:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,406 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-22 00:36:36,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-22 00:36:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:36,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,408 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] [2020-08-22 00:36:36,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:36:36,409 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-22 00:36:36,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570541663] [2020-08-22 00:36:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570541663] [2020-08-22 00:36:36,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427614469] [2020-08-22 00:36:36,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,453 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-22 00:36:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,483 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-22 00:36:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,487 INFO L225 Difference]: With dead ends: 456 [2020-08-22 00:36:36,488 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 00:36:36,489 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 [2020-08-22 00:36:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 00:36:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-22 00:36:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 00:36:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-22 00:36:36,506 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-22 00:36:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,507 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-22 00:36:36,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-22 00:36:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,517 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] [2020-08-22 00:36:36,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:36:36,518 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-22 00:36:36,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999889210] [2020-08-22 00:36:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999889210] [2020-08-22 00:36:36,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160350395] [2020-08-22 00:36:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,589 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-22 00:36:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,624 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-22 00:36:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,628 INFO L225 Difference]: With dead ends: 524 [2020-08-22 00:36:36,628 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 00:36:36,629 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 [2020-08-22 00:36:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 00:36:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-22 00:36:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 00:36:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-22 00:36:36,645 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-22 00:36:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,645 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-22 00:36:36,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-22 00:36:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:36,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,647 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] [2020-08-22 00:36:36,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:36:36,648 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-22 00:36:36,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767786773] [2020-08-22 00:36:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767786773] [2020-08-22 00:36:36,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621757785] [2020-08-22 00:36:36,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,671 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-22 00:36:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,696 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-22 00:36:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,700 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 00:36:36,700 INFO L226 Difference]: Without dead ends: 586 [2020-08-22 00:36:36,701 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 [2020-08-22 00:36:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-22 00:36:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-22 00:36:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 00:36:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-22 00:36:36,721 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-22 00:36:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,721 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-22 00:36:36,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-22 00:36:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:36,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,723 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] [2020-08-22 00:36:36,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:36:36,723 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,724 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-22 00:36:36,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501122063] [2020-08-22 00:36:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501122063] [2020-08-22 00:36:36,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893812130] [2020-08-22 00:36:36,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,750 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-22 00:36:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,778 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-22 00:36:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,783 INFO L225 Difference]: With dead ends: 876 [2020-08-22 00:36:36,783 INFO L226 Difference]: Without dead ends: 602 [2020-08-22 00:36:36,787 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 [2020-08-22 00:36:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-22 00:36:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-22 00:36:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-22 00:36:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-22 00:36:36,809 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-22 00:36:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,809 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-22 00:36:36,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-22 00:36:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:36,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,811 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] [2020-08-22 00:36:36,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 00:36:36,812 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-22 00:36:36,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441026027] [2020-08-22 00:36:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441026027] [2020-08-22 00:36:36,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511693859] [2020-08-22 00:36:36,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,864 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-22 00:36:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:36,900 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-22 00:36:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:36,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:36,906 INFO L225 Difference]: With dead ends: 970 [2020-08-22 00:36:36,906 INFO L226 Difference]: Without dead ends: 968 [2020-08-22 00:36:36,907 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 [2020-08-22 00:36:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-22 00:36:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-22 00:36:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-22 00:36:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-22 00:36:36,945 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-22 00:36:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:36,947 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-22 00:36:36,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-22 00:36:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:36,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:36,950 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] [2020-08-22 00:36:36,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 00:36:36,950 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-22 00:36:36,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:36,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910326009] [2020-08-22 00:36:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:36,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910326009] [2020-08-22 00:36:36,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:36,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:36,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80060837] [2020-08-22 00:36:36,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:36,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:36,981 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-22 00:36:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:37,028 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-22 00:36:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:37,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:37,029 INFO L225 Difference]: With dead ends: 1992 [2020-08-22 00:36:37,030 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:36:37,032 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 [2020-08-22 00:36:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:36:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:36:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:36:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:36:37,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-22 00:36:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:37,034 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:36:37,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:36:37,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:36:37,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 00:36:37,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:36:37,056 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 00:36:37,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:37,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:37,057 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:36:37,057 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:36:37,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:36:37,057 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-22 00:36:37,057 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,058 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-22 00:36:37,059 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,060 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-22 00:36:37,061 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,061 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 00:36:37,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:36:37 BoogieIcfgContainer [2020-08-22 00:36:37,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:36:37,075 INFO L168 Benchmark]: Toolchain (without parser) took 2826.29 ms. Allocated memory was 141.0 MB in the beginning and 244.3 MB in the end (delta: 103.3 MB). Free memory was 103.4 MB in the beginning and 206.1 MB in the end (delta: -102.6 MB). Peak memory consumption was 647.2 kB. Max. memory is 7.1 GB. [2020-08-22 00:36:37,076 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 00:36:37,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.51 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:37,077 INFO L168 Benchmark]: Boogie Preprocessor took 122.36 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 181.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:37,078 INFO L168 Benchmark]: RCFGBuilder took 366.88 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 165.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:37,079 INFO L168 Benchmark]: TraceAbstraction took 2073.15 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 165.5 MB in the beginning and 206.1 MB in the end (delta: -40.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 00:36:37,082 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.51 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.36 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.1 MB in the beginning and 181.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.88 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 165.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2073.15 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 165.5 MB in the beginning and 206.1 MB in the end (delta: -40.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...