/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:29:42,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:29:42,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:29:42,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:29:42,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:29:42,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:29:42,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:29:42,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:29:42,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:29:42,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:29:42,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:29:42,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:29:42,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:29:42,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:29:42,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:29:42,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:29:42,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:29:42,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:29:42,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:29:42,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:29:42,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:29:42,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:29:42,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:29:42,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:29:42,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:29:42,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:29:42,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:29:42,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:29:42,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:29:42,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:29:42,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:29:42,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:29:42,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:29:42,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:29:42,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:29:42,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:29:42,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:29:42,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:29:42,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:29:42,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:29:42,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:29:42,851 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 [2020-08-18 19:29:42,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:29:42,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:29:42,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:29:42,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:29:42,875 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:29:42,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:29:42,875 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:29:42,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:29:42,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:29:42,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:29:42,877 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:29:42,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:29:42,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:29:42,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:29:42,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:29:42,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:29:42,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:29:42,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:29:42,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:29:42,880 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:29:43,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:29:43,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:29:43,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:29:43,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:29:43,234 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:29:43,236 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 19:29:43,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3cf52bb/02935f42533b46519e60c1be8a99189f/FLAG2afb2cf85 [2020-08-18 19:29:43,820 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:29:43,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 19:29:43,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3cf52bb/02935f42533b46519e60c1be8a99189f/FLAG2afb2cf85 [2020-08-18 19:29:44,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3cf52bb/02935f42533b46519e60c1be8a99189f [2020-08-18 19:29:44,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:29:44,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:29:44,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:29:44,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:29:44,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:29:44,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577fa11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44, skipping insertion in model container [2020-08-18 19:29:44,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:29:44,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:29:44,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:29:44,410 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:29:44,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:29:44,440 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:29:44,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44 WrapperNode [2020-08-18 19:29:44,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:29:44,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:29:44,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:29:44,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:29:44,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (1/1) ... [2020-08-18 19:29:44,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:29:44,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:29:44,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:29:44,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:29:44,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (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 [2020-08-18 19:29:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:29:44,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:29:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 19:29:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:29:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:29:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 19:29:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:29:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:29:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:29:44,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:29:44,782 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 19:29:44,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:29:44 BoogieIcfgContainer [2020-08-18 19:29:44,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:29:44,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:29:44,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:29:44,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:29:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:29:44" (1/3) ... [2020-08-18 19:29:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733d62ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:29:44, skipping insertion in model container [2020-08-18 19:29:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:44" (2/3) ... [2020-08-18 19:29:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733d62ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:29:44, skipping insertion in model container [2020-08-18 19:29:44,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:29:44" (3/3) ... [2020-08-18 19:29:44,795 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-08-18 19:29:44,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:29:44,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:29:44,827 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:29:44,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:29:44,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:29:44,850 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:29:44,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:29:44,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:29:44,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:29:44,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:29:44,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:29:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 19:29:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 19:29:44,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:44,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:44,872 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 19:29:44,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:44,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623264738] [2020-08-18 19:29:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:29:45,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623264738] [2020-08-18 19:29:45,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:45,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:29:45,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746716427] [2020-08-18 19:29:45,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:29:45,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:29:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:29:45,181 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 19:29:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:45,284 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 19:29:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:29:45,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 19:29:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:45,299 INFO L225 Difference]: With dead ends: 30 [2020-08-18 19:29:45,300 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 19:29:45,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:29:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 19:29:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 19:29:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 19:29:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 19:29:45,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 19:29:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:45,362 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 19:29:45,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:29:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 19:29:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 19:29:45,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:45,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:45,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:29:45,366 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 19:29:45,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:45,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609296501] [2020-08-18 19:29:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 19:29:45,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609296501] [2020-08-18 19:29:45,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:45,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 19:29:45,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531524302] [2020-08-18 19:29:45,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:29:45,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:29:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:29:45,500 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 19:29:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:45,564 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 19:29:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 19:29:45,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 19:29:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:45,567 INFO L225 Difference]: With dead ends: 25 [2020-08-18 19:29:45,567 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 19:29:45,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:29:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 19:29:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 19:29:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 19:29:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 19:29:45,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 19:29:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:45,577 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 19:29:45,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:29:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 19:29:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:29:45,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:45,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:45,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:29:45,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 19:29:45,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:45,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043715483] [2020-08-18 19:29:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 19:29:45,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043715483] [2020-08-18 19:29:45,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 19:29:45,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812809670] [2020-08-18 19:29:45,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 19:29:45,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 19:29:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:29:45,747 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 19:29:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:45,819 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 19:29:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:29:45,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 19:29:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:45,821 INFO L225 Difference]: With dead ends: 28 [2020-08-18 19:29:45,822 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 19:29:45,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:29:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 19:29:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 19:29:45,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 19:29:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 19:29:45,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 19:29:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:45,831 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 19:29:45,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 19:29:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 19:29:45,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 19:29:45,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:45,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:45,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:29:45,833 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 19:29:45,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:45,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069993981] [2020-08-18 19:29:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:45,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 19:29:46,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069993981] [2020-08-18 19:29:46,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:46,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 19:29:46,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447472651] [2020-08-18 19:29:46,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:29:46,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:29:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:29:46,072 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 19:29:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:46,155 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 19:29:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:29:46,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 19:29:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:46,157 INFO L225 Difference]: With dead ends: 31 [2020-08-18 19:29:46,157 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 19:29:46,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:29:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 19:29:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 19:29:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 19:29:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 19:29:46,165 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 19:29:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:46,165 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 19:29:46,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:29:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 19:29:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 19:29:46,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:46,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:46,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:29:46,168 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 19:29:46,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:46,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860423310] [2020-08-18 19:29:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 19:29:46,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860423310] [2020-08-18 19:29:46,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:46,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 19:29:46,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206596105] [2020-08-18 19:29:46,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:29:46,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:29:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:29:46,339 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 19:29:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:46,422 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 19:29:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 19:29:46,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 19:29:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:46,424 INFO L225 Difference]: With dead ends: 34 [2020-08-18 19:29:46,424 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 19:29:46,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:29:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 19:29:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 19:29:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 19:29:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 19:29:46,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 19:29:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:46,433 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 19:29:46,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:29:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 19:29:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 19:29:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:46,434 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:46,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:29:46,435 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 19:29:46,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:46,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570595493] [2020-08-18 19:29:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 19:29:46,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570595493] [2020-08-18 19:29:46,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:46,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:29:46,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843251077] [2020-08-18 19:29:46,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:29:46,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:29:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:29:46,668 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 19:29:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:46,770 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 19:29:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:29:46,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 19:29:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:46,772 INFO L225 Difference]: With dead ends: 37 [2020-08-18 19:29:46,772 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 19:29:46,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:29:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 19:29:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 19:29:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 19:29:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 19:29:46,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 19:29:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:46,781 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 19:29:46,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:29:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 19:29:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 19:29:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:46,783 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:29:46,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 19:29:46,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:46,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963553532] [2020-08-18 19:29:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:46,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 19:29:47,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963553532] [2020-08-18 19:29:47,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:47,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 19:29:47,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448484121] [2020-08-18 19:29:47,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:29:47,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:29:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:29:47,020 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 19:29:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:47,160 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 19:29:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 19:29:47,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 19:29:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:47,162 INFO L225 Difference]: With dead ends: 40 [2020-08-18 19:29:47,162 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 19:29:47,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:29:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 19:29:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 19:29:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 19:29:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 19:29:47,170 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 19:29:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:47,170 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 19:29:47,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:29:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 19:29:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 19:29:47,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:47,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:47,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:29:47,172 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 19:29:47,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:47,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660497710] [2020-08-18 19:29:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 19:29:47,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660497710] [2020-08-18 19:29:47,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:47,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:29:47,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965292506] [2020-08-18 19:29:47,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:29:47,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:29:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:29:47,433 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 19:29:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:47,558 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 19:29:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:29:47,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 19:29:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:47,560 INFO L225 Difference]: With dead ends: 43 [2020-08-18 19:29:47,560 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 19:29:47,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 19:29:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 19:29:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 19:29:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 19:29:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 19:29:47,567 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 19:29:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:47,567 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 19:29:47,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:29:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 19:29:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 19:29:47,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:47,569 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:47,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:29:47,569 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 19:29:47,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:47,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030732641] [2020-08-18 19:29:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 19:29:47,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030732641] [2020-08-18 19:29:47,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:47,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 19:29:47,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167057722] [2020-08-18 19:29:47,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 19:29:47,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 19:29:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:29:47,855 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 19:29:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:47,999 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 19:29:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 19:29:48,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 19:29:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:48,001 INFO L225 Difference]: With dead ends: 46 [2020-08-18 19:29:48,001 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 19:29:48,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 19:29:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 19:29:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 19:29:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 19:29:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 19:29:48,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 19:29:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:48,009 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 19:29:48,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 19:29:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 19:29:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 19:29:48,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:48,011 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:48,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:29:48,011 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 19:29:48,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:48,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543981741] [2020-08-18 19:29:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 19:29:48,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543981741] [2020-08-18 19:29:48,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:48,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 19:29:48,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742925581] [2020-08-18 19:29:48,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 19:29:48,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 19:29:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:29:48,377 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 19:29:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:48,529 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 19:29:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 19:29:48,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 19:29:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:48,531 INFO L225 Difference]: With dead ends: 49 [2020-08-18 19:29:48,531 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 19:29:48,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 19:29:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 19:29:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 19:29:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 19:29:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 19:29:48,542 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 19:29:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:48,543 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 19:29:48,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 19:29:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 19:29:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 19:29:48,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:48,547 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:48,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:29:48,548 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 19:29:48,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:48,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889631708] [2020-08-18 19:29:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 19:29:48,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889631708] [2020-08-18 19:29:48,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:48,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 19:29:48,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650587630] [2020-08-18 19:29:48,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 19:29:48,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 19:29:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:29:48,996 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 19:29:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:49,169 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 19:29:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 19:29:49,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 19:29:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:49,171 INFO L225 Difference]: With dead ends: 52 [2020-08-18 19:29:49,171 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 19:29:49,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 19:29:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 19:29:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 19:29:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 19:29:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 19:29:49,186 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 19:29:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:49,187 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 19:29:49,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 19:29:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 19:29:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 19:29:49,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:49,190 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:49,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:29:49,190 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:49,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-18 19:29:49,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:49,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194510302] [2020-08-18 19:29:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 19:29:49,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194510302] [2020-08-18 19:29:49,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:49,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 19:29:49,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056540034] [2020-08-18 19:29:49,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 19:29:49,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 19:29:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:29:49,621 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 19:29:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:49,833 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 19:29:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 19:29:49,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 19:29:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:49,836 INFO L225 Difference]: With dead ends: 55 [2020-08-18 19:29:49,836 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 19:29:49,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 19:29:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 19:29:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 19:29:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 19:29:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 19:29:49,844 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 19:29:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:49,844 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 19:29:49,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 19:29:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 19:29:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 19:29:49,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:49,846 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:49,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:29:49,847 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-18 19:29:49,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:49,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293843931] [2020-08-18 19:29:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:49,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 19:29:50,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293843931] [2020-08-18 19:29:50,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:50,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 19:29:50,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924724105] [2020-08-18 19:29:50,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 19:29:50,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 19:29:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 19:29:50,320 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 19:29:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:50,500 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 19:29:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 19:29:50,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 19:29:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:50,502 INFO L225 Difference]: With dead ends: 58 [2020-08-18 19:29:50,503 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 19:29:50,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 19:29:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 19:29:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 19:29:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 19:29:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 19:29:50,509 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 19:29:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:50,510 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 19:29:50,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 19:29:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 19:29:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 19:29:50,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:50,512 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:50,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 19:29:50,512 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-18 19:29:50,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:50,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796060768] [2020-08-18 19:29:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 19:29:51,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796060768] [2020-08-18 19:29:51,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:51,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 19:29:51,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296551629] [2020-08-18 19:29:51,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 19:29:51,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 19:29:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:29:51,101 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 19:29:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:51,357 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 19:29:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 19:29:51,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 19:29:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:51,360 INFO L225 Difference]: With dead ends: 61 [2020-08-18 19:29:51,360 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 19:29:51,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 19:29:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 19:29:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 19:29:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 19:29:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 19:29:51,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 19:29:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:51,368 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 19:29:51,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 19:29:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 19:29:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 19:29:51,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:51,369 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:51,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 19:29:51,370 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-18 19:29:51,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:51,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397576347] [2020-08-18 19:29:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 19:29:51,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397576347] [2020-08-18 19:29:51,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:51,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 19:29:51,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548559270] [2020-08-18 19:29:51,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 19:29:51,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:51,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 19:29:51,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 19:29:51,961 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 19:29:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:52,221 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 19:29:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 19:29:52,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 19:29:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:52,223 INFO L225 Difference]: With dead ends: 64 [2020-08-18 19:29:52,223 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 19:29:52,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 19:29:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 19:29:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 19:29:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 19:29:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 19:29:52,239 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 19:29:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:52,241 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 19:29:52,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 19:29:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 19:29:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 19:29:52,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:52,243 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:52,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 19:29:52,243 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:52,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-18 19:29:52,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:52,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289666651] [2020-08-18 19:29:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 19:29:52,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289666651] [2020-08-18 19:29:52,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:52,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 19:29:52,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213685448] [2020-08-18 19:29:52,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 19:29:52,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 19:29:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 19:29:52,951 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 19:29:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:53,195 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 19:29:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 19:29:53,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 19:29:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:53,197 INFO L225 Difference]: With dead ends: 67 [2020-08-18 19:29:53,198 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 19:29:53,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 19:29:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 19:29:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 19:29:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 19:29:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 19:29:53,209 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 19:29:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:53,210 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 19:29:53,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 19:29:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 19:29:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 19:29:53,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:53,213 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:53,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 19:29:53,213 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-18 19:29:53,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:53,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465454080] [2020-08-18 19:29:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 19:29:53,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465454080] [2020-08-18 19:29:53,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:53,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 19:29:53,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634952993] [2020-08-18 19:29:53,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 19:29:53,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 19:29:53,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 19:29:53,981 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 19:29:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:54,292 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 19:29:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 19:29:54,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 19:29:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:54,295 INFO L225 Difference]: With dead ends: 70 [2020-08-18 19:29:54,295 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 19:29:54,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 19:29:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 19:29:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 19:29:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 19:29:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 19:29:54,302 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 19:29:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:54,302 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 19:29:54,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 19:29:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 19:29:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 19:29:54,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:54,304 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:54,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 19:29:54,305 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-18 19:29:54,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:54,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114864975] [2020-08-18 19:29:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 19:29:55,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114864975] [2020-08-18 19:29:55,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:55,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 19:29:55,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773689305] [2020-08-18 19:29:55,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 19:29:55,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 19:29:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 19:29:55,200 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 19:29:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:55,457 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 19:29:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 19:29:55,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 19:29:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:55,459 INFO L225 Difference]: With dead ends: 73 [2020-08-18 19:29:55,459 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 19:29:55,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 19:29:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 19:29:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 19:29:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 19:29:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 19:29:55,465 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 19:29:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:55,465 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 19:29:55,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 19:29:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 19:29:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 19:29:55,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:55,467 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:55,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 19:29:55,467 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-18 19:29:55,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:55,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796928248] [2020-08-18 19:29:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:55,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 19:29:56,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796928248] [2020-08-18 19:29:56,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:56,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 19:29:56,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974276285] [2020-08-18 19:29:56,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 19:29:56,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 19:29:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 19:29:56,482 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 19:29:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:56,793 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 19:29:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 19:29:56,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 19:29:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:56,795 INFO L225 Difference]: With dead ends: 76 [2020-08-18 19:29:56,795 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 19:29:56,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 19:29:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 19:29:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 19:29:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 19:29:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 19:29:56,806 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 19:29:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:56,807 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 19:29:56,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 19:29:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 19:29:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 19:29:56,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:56,810 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:56,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 19:29:56,811 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-18 19:29:56,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:56,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746550982] [2020-08-18 19:29:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:56,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 19:29:57,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746550982] [2020-08-18 19:29:57,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:29:57,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 19:29:57,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612154798] [2020-08-18 19:29:57,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 19:29:57,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 19:29:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 19:29:57,817 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 19:29:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:58,165 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 19:29:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 19:29:58,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 19:29:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:58,167 INFO L225 Difference]: With dead ends: 79 [2020-08-18 19:29:58,167 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 19:29:58,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 19:29:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 19:29:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 19:29:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 19:29:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 19:29:58,172 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 19:29:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:58,173 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 19:29:58,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 19:29:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 19:29:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 19:29:58,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:58,175 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:58,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 19:29:58,175 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-18 19:29:58,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:58,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513874615] [2020-08-18 19:29:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:58,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-08-18 19:29:59,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513874615] [2020-08-18 19:29:59,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:59,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 19:29:59,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644373805] [2020-08-18 19:29:59,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:29:59,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:29:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:29:59,746 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 8 states. [2020-08-18 19:29:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:59,842 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-08-18 19:29:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:29:59,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-08-18 19:29:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:59,843 INFO L225 Difference]: With dead ends: 75 [2020-08-18 19:29:59,843 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 19:29:59,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:29:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 19:29:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 19:29:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 19:29:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 19:29:59,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-08-18 19:29:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:59,845 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 19:29:59,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:29:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 19:29:59,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 19:29:59,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 19:29:59,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 19:29:59,876 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 19:29:59,877 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:29:59,877 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:29:59,877 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 19:29:59,877 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 19:29:59,877 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 19:29:59,877 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-18 19:29:59,877 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-18 19:29:59,878 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-18 19:29:59,878 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-18 19:29:59,878 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-18 19:29:59,879 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-18 19:29:59,880 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2020-08-18 19:29:59,880 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-18 19:29:59,880 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-18 19:29:59,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:29:59 BoogieIcfgContainer [2020-08-18 19:29:59,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:29:59,905 INFO L168 Benchmark]: Toolchain (without parser) took 15706.56 ms. Allocated memory was 140.5 MB in the beginning and 530.1 MB in the end (delta: 389.5 MB). Free memory was 103.6 MB in the beginning and 361.9 MB in the end (delta: -258.3 MB). Peak memory consumption was 131.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,906 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.50 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,907 INFO L168 Benchmark]: Boogie Preprocessor took 106.27 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 182.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,911 INFO L168 Benchmark]: RCFGBuilder took 238.50 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,912 INFO L168 Benchmark]: TraceAbstraction took 15112.19 ms. Allocated memory was 203.4 MB in the beginning and 530.1 MB in the end (delta: 326.6 MB). Free memory was 169.9 MB in the beginning and 361.9 MB in the end (delta: -192.0 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:59,914 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.50 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 94.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.27 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.2 MB in the beginning and 182.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 238.50 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15112.19 ms. Allocated memory was 203.4 MB in the beginning and 530.1 MB in the end (delta: 326.6 MB). Free memory was 169.9 MB in the beginning and 361.9 MB in the end (delta: -192.0 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 525 SDslu, 1157 SDs, 0 SdLazy, 853 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1034 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1512 ConstructedInterpolants, 0 QuantifiedInterpolants, 435840 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5020/8820 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...