/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:23:36,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:23:36,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:23:36,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:23:36,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:23:36,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:23:36,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:23:36,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:23:36,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:23:36,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:23:36,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:23:36,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:23:36,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:23:36,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:23:36,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:23:36,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:23:36,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:23:36,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:23:36,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:23:36,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:23:36,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:23:36,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:23:36,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:23:36,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:23:36,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:23:36,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:23:36,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:23:36,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:23:36,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:23:36,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 04:23:36,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:23:36,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:23:36,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:23:36,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:23:36,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:23:36,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:23:36,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:23:36,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:23:36,992 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:23:36,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:23:36,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:23:36,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:23:36,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:23:36,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:23:36,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:23:36,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:23:36,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:23:36,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:23:36,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:23:36,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:23:36,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:23:36,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:23:36,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:23:36,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:23:36,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:23:36,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:23:36,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:23:36,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:23:36,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:23:36,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:23:36,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:23:36,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:23:36,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:23:36,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:23:37,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:23:37,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:23:37,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:23:37,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:23:37,326 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:23:37,327 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-19 04:23:37,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58791051/e2831b07bde74facb957cb79b5c8ca0d/FLAGa4e50ea51 [2020-08-19 04:23:37,847 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:23:37,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-19 04:23:37,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58791051/e2831b07bde74facb957cb79b5c8ca0d/FLAGa4e50ea51 [2020-08-19 04:23:38,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58791051/e2831b07bde74facb957cb79b5c8ca0d [2020-08-19 04:23:38,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:23:38,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:23:38,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:38,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:23:38,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:23:38,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38, skipping insertion in model container [2020-08-19 04:23:38,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:23:38,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:23:38,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:38,468 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:23:38,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:38,504 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:23:38,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38 WrapperNode [2020-08-19 04:23:38,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:38,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:23:38,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:23:38,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:23:38,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... [2020-08-19 04:23:38,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:23:38,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:23:38,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:23:38,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:23:38,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:23:38,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:23:38,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:23:38,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:23:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:23:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:23:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:23:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:23:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:23:38,933 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:23:38,934 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 04:23:38,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:38 BoogieIcfgContainer [2020-08-19 04:23:38,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:23:38,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:23:38,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:23:38,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:23:38,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:23:38" (1/3) ... [2020-08-19 04:23:38,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e037107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:38, skipping insertion in model container [2020-08-19 04:23:38,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:38" (2/3) ... [2020-08-19 04:23:38,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e037107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:38, skipping insertion in model container [2020-08-19 04:23:38,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:38" (3/3) ... [2020-08-19 04:23:38,947 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-19 04:23:38,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:23:38,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:23:38,986 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:23:39,017 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:23:39,018 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:23:39,018 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:23:39,018 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:23:39,018 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:23:39,018 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:23:39,019 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:23:39,019 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:23:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-19 04:23:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 04:23:39,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,050 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-19 04:23:39,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511930815] [2020-08-19 04:23:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511930815] [2020-08-19 04:23:39,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003865600] [2020-08-19 04:23:39,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,308 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-19 04:23:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,365 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-19 04:23:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 04:23:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,381 INFO L225 Difference]: With dead ends: 63 [2020-08-19 04:23:39,381 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:23:39,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:23:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-19 04:23:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 04:23:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-19 04:23:39,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-19 04:23:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,440 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-19 04:23:39,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-19 04:23:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 04:23:39,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:23:39,443 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-19 04:23:39,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31548288] [2020-08-19 04:23:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31548288] [2020-08-19 04:23:39,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364279949] [2020-08-19 04:23:39,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,536 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-19 04:23:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,583 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-19 04:23:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 04:23:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,587 INFO L225 Difference]: With dead ends: 77 [2020-08-19 04:23:39,587 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:23:39,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:23:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-19 04:23:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 04:23:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-19 04:23:39,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-19 04:23:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,608 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-19 04:23:39,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-19 04:23:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 04:23:39,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:23:39,611 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-19 04:23:39,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870789595] [2020-08-19 04:23:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870789595] [2020-08-19 04:23:39,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883588371] [2020-08-19 04:23:39,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,701 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-19 04:23:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,722 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-19 04:23:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 04:23:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,724 INFO L225 Difference]: With dead ends: 72 [2020-08-19 04:23:39,725 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 04:23:39,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 04:23:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-19 04:23:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 04:23:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-19 04:23:39,735 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-19 04:23:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,735 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-19 04:23:39,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-19 04:23:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 04:23:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:23:39,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-19 04:23:39,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526212713] [2020-08-19 04:23:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526212713] [2020-08-19 04:23:39,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131066155] [2020-08-19 04:23:39,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,779 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-19 04:23:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,801 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-19 04:23:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 04:23:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,803 INFO L225 Difference]: With dead ends: 88 [2020-08-19 04:23:39,803 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 04:23:39,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 04:23:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-19 04:23:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 04:23:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-19 04:23:39,815 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-19 04:23:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,816 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-19 04:23:39,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-19 04:23:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 04:23:39,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:23:39,818 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,818 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-19 04:23:39,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523350881] [2020-08-19 04:23:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523350881] [2020-08-19 04:23:39,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183794559] [2020-08-19 04:23:39,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,869 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-19 04:23:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,895 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-19 04:23:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 04:23:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,898 INFO L225 Difference]: With dead ends: 144 [2020-08-19 04:23:39,898 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 04:23:39,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 04:23:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-19 04:23:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-19 04:23:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-19 04:23:39,911 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-19 04:23:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,911 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-19 04:23:39,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-19 04:23:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:23:39,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:23:39,913 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-19 04:23:39,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773892475] [2020-08-19 04:23:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:39,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773892475] [2020-08-19 04:23:39,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:39,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:39,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244789538] [2020-08-19 04:23:39,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:39,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,947 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-19 04:23:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:39,968 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-19 04:23:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:39,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 04:23:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:39,971 INFO L225 Difference]: With dead ends: 129 [2020-08-19 04:23:39,971 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 04:23:39,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 04:23:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-19 04:23:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 04:23:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-19 04:23:39,986 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-19 04:23:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:39,987 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-19 04:23:39,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-19 04:23:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:23:39,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:39,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:39,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:23:39,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-19 04:23:39,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:39,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862459175] [2020-08-19 04:23:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862459175] [2020-08-19 04:23:40,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138361797] [2020-08-19 04:23:40,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,051 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-19 04:23:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,077 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-19 04:23:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 04:23:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,080 INFO L225 Difference]: With dead ends: 156 [2020-08-19 04:23:40,080 INFO L226 Difference]: Without dead ends: 154 [2020-08-19 04:23:40,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-19 04:23:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-19 04:23:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 04:23:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-19 04:23:40,096 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-19 04:23:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,096 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-19 04:23:40,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-19 04:23:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:23:40,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:23:40,099 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-19 04:23:40,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373722304] [2020-08-19 04:23:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373722304] [2020-08-19 04:23:40,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563081501] [2020-08-19 04:23:40,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,133 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-19 04:23:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,185 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-19 04:23:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 04:23:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,188 INFO L225 Difference]: With dead ends: 272 [2020-08-19 04:23:40,188 INFO L226 Difference]: Without dead ends: 162 [2020-08-19 04:23:40,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-19 04:23:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-19 04:23:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-19 04:23:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-19 04:23:40,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-19 04:23:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,225 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-19 04:23:40,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-19 04:23:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:23:40,228 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-19 04:23:40,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104809249] [2020-08-19 04:23:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104809249] [2020-08-19 04:23:40,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13631322] [2020-08-19 04:23:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,279 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-19 04:23:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,298 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-19 04:23:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,300 INFO L225 Difference]: With dead ends: 240 [2020-08-19 04:23:40,300 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 04:23:40,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 04:23:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-19 04:23:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-19 04:23:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-19 04:23:40,312 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-19 04:23:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,313 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-19 04:23:40,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-19 04:23:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:40,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:23:40,315 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-19 04:23:40,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594633328] [2020-08-19 04:23:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594633328] [2020-08-19 04:23:40,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766503273] [2020-08-19 04:23:40,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,343 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-19 04:23:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,362 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-19 04:23:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,364 INFO L225 Difference]: With dead ends: 284 [2020-08-19 04:23:40,365 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 04:23:40,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 04:23:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-19 04:23:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-19 04:23:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-19 04:23:40,382 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-19 04:23:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,383 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-19 04:23:40,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-19 04:23:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:40,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:23:40,385 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-19 04:23:40,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564760282] [2020-08-19 04:23:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564760282] [2020-08-19 04:23:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929499709] [2020-08-19 04:23:40,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,428 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-19 04:23:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,466 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-19 04:23:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,469 INFO L225 Difference]: With dead ends: 524 [2020-08-19 04:23:40,469 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 04:23:40,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 04:23:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-19 04:23:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-19 04:23:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-19 04:23:40,494 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-19 04:23:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,495 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-19 04:23:40,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-19 04:23:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:40,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:23:40,497 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-19 04:23:40,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78538166] [2020-08-19 04:23:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78538166] [2020-08-19 04:23:40,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857368348] [2020-08-19 04:23:40,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,541 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-19 04:23:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,561 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-19 04:23:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,563 INFO L225 Difference]: With dead ends: 456 [2020-08-19 04:23:40,564 INFO L226 Difference]: Without dead ends: 314 [2020-08-19 04:23:40,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-19 04:23:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-19 04:23:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-19 04:23:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-19 04:23:40,577 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-19 04:23:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,578 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-19 04:23:40,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-19 04:23:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:23:40,580 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-19 04:23:40,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415607630] [2020-08-19 04:23:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415607630] [2020-08-19 04:23:40,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939479062] [2020-08-19 04:23:40,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,607 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-19 04:23:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,627 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-19 04:23:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,631 INFO L225 Difference]: With dead ends: 524 [2020-08-19 04:23:40,631 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 04:23:40,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 04:23:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-19 04:23:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-19 04:23:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-19 04:23:40,648 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-19 04:23:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,648 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-19 04:23:40,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-19 04:23:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:40,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:23:40,650 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-19 04:23:40,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490266953] [2020-08-19 04:23:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490266953] [2020-08-19 04:23:40,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438431121] [2020-08-19 04:23:40,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,675 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-19 04:23:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,714 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-19 04:23:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,718 INFO L225 Difference]: With dead ends: 1020 [2020-08-19 04:23:40,718 INFO L226 Difference]: Without dead ends: 586 [2020-08-19 04:23:40,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-19 04:23:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-19 04:23:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-19 04:23:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-19 04:23:40,742 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-19 04:23:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,742 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-19 04:23:40,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-19 04:23:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:40,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:23:40,746 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-19 04:23:40,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799968185] [2020-08-19 04:23:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799968185] [2020-08-19 04:23:40,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125918503] [2020-08-19 04:23:40,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,771 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-19 04:23:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,794 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-19 04:23:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,797 INFO L225 Difference]: With dead ends: 876 [2020-08-19 04:23:40,797 INFO L226 Difference]: Without dead ends: 602 [2020-08-19 04:23:40,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-19 04:23:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-19 04:23:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-19 04:23:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-19 04:23:40,819 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-19 04:23:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,819 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-19 04:23:40,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-19 04:23:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:40,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:23:40,821 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-19 04:23:40,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138270031] [2020-08-19 04:23:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138270031] [2020-08-19 04:23:40,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760805854] [2020-08-19 04:23:40,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,847 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-19 04:23:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,878 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-19 04:23:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,884 INFO L225 Difference]: With dead ends: 970 [2020-08-19 04:23:40,884 INFO L226 Difference]: Without dead ends: 968 [2020-08-19 04:23:40,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-19 04:23:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-19 04:23:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-19 04:23:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-19 04:23:40,918 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-19 04:23:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,919 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-19 04:23:40,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-19 04:23:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:40,921 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:40,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:40,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:23:40,922 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-19 04:23:40,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:40,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700062059] [2020-08-19 04:23:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:40,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700062059] [2020-08-19 04:23:40,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:40,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:40,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960267661] [2020-08-19 04:23:40,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:40,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,945 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-19 04:23:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:40,993 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-19 04:23:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:40,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:40,994 INFO L225 Difference]: With dead ends: 1992 [2020-08-19 04:23:40,995 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:23:40,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:23:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:23:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:23:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:23:40,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-19 04:23:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:40,999 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:23:40,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:23:40,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:23:40,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:23:41,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:23:41,024 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:23:41,024 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:41,024 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:41,024 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:23:41,024 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-19 04:23:41,025 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-19 04:23:41,025 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,026 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-19 04:23:41,027 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-19 04:23:41,027 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-19 04:23:41,027 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,027 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-19 04:23:41,027 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-19 04:23:41,027 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-19 04:23:41,027 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,028 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-19 04:23:41,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:23:41 BoogieIcfgContainer [2020-08-19 04:23:41,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:23:41,043 INFO L168 Benchmark]: Toolchain (without parser) took 2786.94 ms. Allocated memory was 141.0 MB in the beginning and 244.8 MB in the end (delta: 103.8 MB). Free memory was 103.0 MB in the beginning and 209.8 MB in the end (delta: -106.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:23:41,044 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:23:41,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:41,045 INFO L168 Benchmark]: Boogie Preprocessor took 128.48 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 182.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:41,046 INFO L168 Benchmark]: RCFGBuilder took 304.54 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 167.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:41,047 INFO L168 Benchmark]: TraceAbstraction took 2099.95 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 166.6 MB in the beginning and 209.8 MB in the end (delta: -43.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:23:41,050 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.48 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 182.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.54 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 167.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2099.95 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 166.6 MB in the beginning and 209.8 MB in the end (delta: -43.3 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...