/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:19:59,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:19:59,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:19:59,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:19:59,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:19:59,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:19:59,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:19:59,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:19:59,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:19:59,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:19:59,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:19:59,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:19:59,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:19:59,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:19:59,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:19:59,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:19:59,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:19:59,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:19:59,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:19:59,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:19:59,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:19:59,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:19:59,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:19:59,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:19:59,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:19:59,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:19:59,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:19:59,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:19:59,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:19:59,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:19:59,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:19:59,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:19:59,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:19:59,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:19:59,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:19:59,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:19:59,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:19:59,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:19:59,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:19:59,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:19:59,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:19:59,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:19:59,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:19:59,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:19:59,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:19:59,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:19:59,884 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:19:59,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:19:59,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:19:59,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:19:59,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:19:59,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:19:59,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:19:59,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:19:59,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:19:59,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:19:59,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:19:59,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:19:59,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:19:59,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:19:59,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:19:59,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:19:59,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:19:59,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:19:59,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:19:59,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:19:59,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:00,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:00,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:00,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:00,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:00,225 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:00,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-08-21 17:20:00,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fd0fdef/b2f52d21f28043868dd16a6b2b9bfb74/FLAG3987d4dcb [2020-08-21 17:20:00,791 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:00,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-08-21 17:20:00,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fd0fdef/b2f52d21f28043868dd16a6b2b9bfb74/FLAG3987d4dcb [2020-08-21 17:20:01,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22fd0fdef/b2f52d21f28043868dd16a6b2b9bfb74 [2020-08-21 17:20:01,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:01,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:01,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:01,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:01,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:01,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b86a7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01, skipping insertion in model container [2020-08-21 17:20:01,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:01,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:01,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:01,569 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:01,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:01,611 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:01,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01 WrapperNode [2020-08-21 17:20:01,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:01,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:01,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:01,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:01,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... [2020-08-21 17:20:01,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:01,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:01,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:01,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:01,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:01,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:01,881 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 17:20:01,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 17:20:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:02,052 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:02,053 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:20:02,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:02 BoogieIcfgContainer [2020-08-21 17:20:02,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:02,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:02,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:02,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:02,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:01" (1/3) ... [2020-08-21 17:20:02,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d4d895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:02, skipping insertion in model container [2020-08-21 17:20:02,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:01" (2/3) ... [2020-08-21 17:20:02,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d4d895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:02, skipping insertion in model container [2020-08-21 17:20:02,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:02" (3/3) ... [2020-08-21 17:20:02,065 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-08-21 17:20:02,076 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:02,084 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:02,099 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:02,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:02,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:02,124 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:02,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:02,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:02,125 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:02,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:02,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 17:20:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 17:20:02,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:02,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:02,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 17:20:02,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:02,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273527564] [2020-08-21 17:20:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:02,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273527564] [2020-08-21 17:20:02,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:02,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:20:02,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324706934] [2020-08-21 17:20:02,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:20:02,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:20:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:20:02,400 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 17:20:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:02,481 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 17:20:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:20:02,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 17:20:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:02,495 INFO L225 Difference]: With dead ends: 30 [2020-08-21 17:20:02,496 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 17:20:02,499 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 [2020-08-21 17:20:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 17:20:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 17:20:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 17:20:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 17:20:02,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 17:20:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:02,555 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 17:20:02,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:20:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 17:20:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:02,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:02,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:02,558 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 17:20:02,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:02,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056947205] [2020-08-21 17:20:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:20:02,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056947205] [2020-08-21 17:20:02,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:02,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:20:02,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956227] [2020-08-21 17:20:02,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:20:02,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:02,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:20:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:20:02,706 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 17:20:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:02,775 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 17:20:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:20:02,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 17:20:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:02,778 INFO L225 Difference]: With dead ends: 25 [2020-08-21 17:20:02,778 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 17:20:02,779 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 [2020-08-21 17:20:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 17:20:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 17:20:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 17:20:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 17:20:02,787 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 17:20:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:02,787 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 17:20:02,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:20:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 17:20:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 17:20:02,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:02,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:02,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:02,790 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 17:20:02,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:02,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129827278] [2020-08-21 17:20:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 17:20:02,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129827278] [2020-08-21 17:20:02,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:20:02,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949009111] [2020-08-21 17:20:02,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:20:02,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:20:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:20:02,938 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 17:20:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:03,000 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 17:20:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:20:03,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 17:20:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:03,003 INFO L225 Difference]: With dead ends: 28 [2020-08-21 17:20:03,003 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 17:20:03,004 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 [2020-08-21 17:20:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 17:20:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 17:20:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 17:20:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 17:20:03,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 17:20:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:03,011 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 17:20:03,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:20:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 17:20:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 17:20:03,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:03,013 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:03,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:03,014 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 17:20:03,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:03,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710420406] [2020-08-21 17:20:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 17:20:03,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710420406] [2020-08-21 17:20:03,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:03,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:20:03,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914387652] [2020-08-21 17:20:03,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:20:03,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:20:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:20:03,204 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 17:20:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:03,300 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 17:20:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:20:03,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 17:20:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:03,302 INFO L225 Difference]: With dead ends: 31 [2020-08-21 17:20:03,302 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 17:20:03,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:20:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 17:20:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 17:20:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 17:20:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 17:20:03,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 17:20:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:03,311 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 17:20:03,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:20:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 17:20:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 17:20:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:03,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:03,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:03,313 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 17:20:03,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:03,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697459768] [2020-08-21 17:20:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 17:20:03,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697459768] [2020-08-21 17:20:03,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:03,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:20:03,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778972549] [2020-08-21 17:20:03,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:20:03,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:20:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:20:03,613 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 17:20:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:03,713 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 17:20:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:20:03,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 17:20:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:03,717 INFO L225 Difference]: With dead ends: 34 [2020-08-21 17:20:03,717 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 17:20:03,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:20:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 17:20:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 17:20:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:20:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 17:20:03,733 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 17:20:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:03,739 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 17:20:03,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:20:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 17:20:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 17:20:03,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:03,742 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:03,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:03,743 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 17:20:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:03,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126388037] [2020-08-21 17:20:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 17:20:03,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126388037] [2020-08-21 17:20:03,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:03,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:20:03,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670561336] [2020-08-21 17:20:03,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:20:03,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:20:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:20:03,944 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 17:20:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:04,044 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 17:20:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:20:04,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 17:20:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:04,046 INFO L225 Difference]: With dead ends: 37 [2020-08-21 17:20:04,046 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 17:20:04,047 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 [2020-08-21 17:20:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 17:20:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 17:20:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 17:20:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 17:20:04,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 17:20:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:04,055 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 17:20:04,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:20:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 17:20:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 17:20:04,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:04,057 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:04,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:04,057 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 17:20:04,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:04,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092062506] [2020-08-21 17:20:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 17:20:04,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092062506] [2020-08-21 17:20:04,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:04,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:20:04,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568601999] [2020-08-21 17:20:04,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:20:04,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:20:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:20:04,253 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 17:20:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:04,382 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 17:20:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:20:04,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 17:20:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:04,384 INFO L225 Difference]: With dead ends: 40 [2020-08-21 17:20:04,384 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 17:20:04,385 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 [2020-08-21 17:20:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 17:20:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 17:20:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 17:20:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 17:20:04,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 17:20:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:04,391 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 17:20:04,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:20:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 17:20:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 17:20:04,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:04,393 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:04,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:04,393 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 17:20:04,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:04,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833410773] [2020-08-21 17:20:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 17:20:04,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833410773] [2020-08-21 17:20:04,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:04,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:20:04,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902524347] [2020-08-21 17:20:04,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:20:04,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:20:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:20:04,598 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 17:20:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:04,707 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 17:20:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:20:04,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 17:20:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:04,709 INFO L225 Difference]: With dead ends: 43 [2020-08-21 17:20:04,709 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 17:20:04,710 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 [2020-08-21 17:20:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 17:20:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 17:20:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 17:20:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 17:20:04,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 17:20:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:04,717 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 17:20:04,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:20:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 17:20:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:20:04,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:04,719 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:04,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:04,719 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 17:20:04,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:04,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752480082] [2020-08-21 17:20:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 17:20:05,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752480082] [2020-08-21 17:20:05,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:05,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:20:05,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575816422] [2020-08-21 17:20:05,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:20:05,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:05,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:20:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:20:05,046 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 17:20:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:05,171 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 17:20:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:20:05,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 17:20:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:05,173 INFO L225 Difference]: With dead ends: 46 [2020-08-21 17:20:05,173 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 17:20:05,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:20:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 17:20:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 17:20:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 17:20:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 17:20:05,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 17:20:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:05,182 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 17:20:05,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:20:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 17:20:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 17:20:05,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:05,183 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:05,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:05,184 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 17:20:05,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:05,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086132577] [2020-08-21 17:20:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 17:20:05,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086132577] [2020-08-21 17:20:05,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:05,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:20:05,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027207481] [2020-08-21 17:20:05,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:20:05,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:20:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:20:05,466 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 17:20:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:05,623 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 17:20:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:20:05,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 17:20:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:05,625 INFO L225 Difference]: With dead ends: 49 [2020-08-21 17:20:05,625 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 17:20:05,626 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 [2020-08-21 17:20:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 17:20:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 17:20:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 17:20:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 17:20:05,632 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 17:20:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:05,632 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 17:20:05,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:20:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 17:20:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 17:20:05,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:05,634 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:05,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:05,634 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:05,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 17:20:05,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:05,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140852619] [2020-08-21 17:20:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 17:20:05,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140852619] [2020-08-21 17:20:05,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:05,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 17:20:05,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105122053] [2020-08-21 17:20:05,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:20:05,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:20:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:20:05,928 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 17:20:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:06,071 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 17:20:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:20:06,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 17:20:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:06,073 INFO L225 Difference]: With dead ends: 52 [2020-08-21 17:20:06,073 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 17:20:06,074 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 [2020-08-21 17:20:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 17:20:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 17:20:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 17:20:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 17:20:06,081 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 17:20:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:06,081 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 17:20:06,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:20:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 17:20:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 17:20:06,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:06,083 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:06,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:06,083 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 17:20:06,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:06,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701377503] [2020-08-21 17:20:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 17:20:06,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701377503] [2020-08-21 17:20:06,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:06,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 17:20:06,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253728414] [2020-08-21 17:20:06,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 17:20:06,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 17:20:06,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:20:06,553 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 17:20:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:06,738 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 17:20:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:20:06,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 17:20:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:06,740 INFO L225 Difference]: With dead ends: 55 [2020-08-21 17:20:06,740 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 17:20:06,743 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 [2020-08-21 17:20:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 17:20:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 17:20:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 17:20:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 17:20:06,759 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 17:20:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:06,759 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 17:20:06,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 17:20:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 17:20:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 17:20:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:06,764 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:06,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:06,764 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 17:20:06,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:06,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193070109] [2020-08-21 17:20:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:06,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 17:20:07,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193070109] [2020-08-21 17:20:07,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:07,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 17:20:07,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443333564] [2020-08-21 17:20:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 17:20:07,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 17:20:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 17:20:07,300 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 17:20:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:07,493 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 17:20:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:20:07,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 17:20:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:07,495 INFO L225 Difference]: With dead ends: 58 [2020-08-21 17:20:07,495 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 17:20:07,496 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 [2020-08-21 17:20:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 17:20:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 17:20:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 17:20:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 17:20:07,502 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 17:20:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:07,503 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 17:20:07,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 17:20:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 17:20:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 17:20:07,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:07,505 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:07,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:07,505 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:07,506 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 17:20:07,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:07,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507221228] [2020-08-21 17:20:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:07,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 17:20:08,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507221228] [2020-08-21 17:20:08,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:08,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 17:20:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623135574] [2020-08-21 17:20:08,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 17:20:08,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 17:20:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:20:08,026 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 17:20:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:08,224 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 17:20:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 17:20:08,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 17:20:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:08,226 INFO L225 Difference]: With dead ends: 61 [2020-08-21 17:20:08,228 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 17:20:08,230 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 [2020-08-21 17:20:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 17:20:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 17:20:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 17:20:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 17:20:08,242 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 17:20:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:08,243 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 17:20:08,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 17:20:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 17:20:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 17:20:08,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:08,248 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:08,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:08,248 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 17:20:08,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:08,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86277351] [2020-08-21 17:20:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 17:20:08,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86277351] [2020-08-21 17:20:08,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:08,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 17:20:08,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295523860] [2020-08-21 17:20:08,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 17:20:08,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:08,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 17:20:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:20:08,861 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 17:20:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:09,218 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 17:20:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:20:09,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 17:20:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:09,219 INFO L225 Difference]: With dead ends: 64 [2020-08-21 17:20:09,220 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 17:20:09,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 17:20:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 17:20:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 17:20:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 17:20:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 17:20:09,234 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 17:20:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:09,236 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 17:20:09,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 17:20:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 17:20:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 17:20:09,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:09,239 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:09,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:20:09,240 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 17:20:09,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:09,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853115272] [2020-08-21 17:20:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 17:20:09,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853115272] [2020-08-21 17:20:09,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:09,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 17:20:09,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662376500] [2020-08-21 17:20:09,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 17:20:09,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 17:20:09,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:20:09,890 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 17:20:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:10,128 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 17:20:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 17:20:10,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 17:20:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:10,130 INFO L225 Difference]: With dead ends: 67 [2020-08-21 17:20:10,130 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 17:20:10,131 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 [2020-08-21 17:20:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 17:20:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 17:20:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 17:20:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 17:20:10,136 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 17:20:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:10,137 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 17:20:10,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 17:20:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 17:20:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 17:20:10,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:10,138 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:10,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:20:10,139 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 17:20:10,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:10,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060109000] [2020-08-21 17:20:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 17:20:10,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060109000] [2020-08-21 17:20:10,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:10,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 17:20:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635482054] [2020-08-21 17:20:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 17:20:10,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 17:20:10,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:20:10,855 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 17:20:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:11,087 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 17:20:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:20:11,087 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 17:20:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:11,089 INFO L225 Difference]: With dead ends: 70 [2020-08-21 17:20:11,089 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 17:20:11,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 17:20:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 17:20:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 17:20:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 17:20:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 17:20:11,095 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 17:20:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:11,095 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 17:20:11,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 17:20:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 17:20:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 17:20:11,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:11,097 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:11,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:20:11,098 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 17:20:11,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:11,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170397568] [2020-08-21 17:20:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 17:20:11,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170397568] [2020-08-21 17:20:11,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:11,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 17:20:11,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978454081] [2020-08-21 17:20:11,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 17:20:11,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 17:20:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:20:11,846 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 17:20:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:12,105 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 17:20:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:20:12,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 17:20:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:12,107 INFO L225 Difference]: With dead ends: 73 [2020-08-21 17:20:12,107 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 17:20:12,109 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 [2020-08-21 17:20:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 17:20:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 17:20:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 17:20:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 17:20:12,117 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 17:20:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:12,117 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 17:20:12,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 17:20:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 17:20:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 17:20:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:12,119 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:12,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:20:12,119 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 17:20:12,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:12,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133540299] [2020-08-21 17:20:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 17:20:12,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133540299] [2020-08-21 17:20:12,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:12,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 17:20:12,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243886638] [2020-08-21 17:20:12,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 17:20:12,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 17:20:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:20:12,998 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 17:20:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:13,290 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 17:20:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 17:20:13,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 17:20:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:13,292 INFO L225 Difference]: With dead ends: 76 [2020-08-21 17:20:13,292 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:20:13,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 17:20:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:20:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 17:20:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 17:20:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 17:20:13,302 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 17:20:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:13,302 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 17:20:13,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 17:20:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 17:20:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 17:20:13,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:13,304 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:13,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 17:20:13,305 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 17:20:13,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:13,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333233250] [2020-08-21 17:20:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:13,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 17:20:14,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333233250] [2020-08-21 17:20:14,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:14,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 17:20:14,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773227123] [2020-08-21 17:20:14,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 17:20:14,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 17:20:14,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:20:14,305 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 17:20:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:14,629 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 17:20:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 17:20:14,632 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 17:20:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:14,634 INFO L225 Difference]: With dead ends: 79 [2020-08-21 17:20:14,634 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 17:20:14,635 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 [2020-08-21 17:20:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 17:20:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 17:20:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 17:20:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 17:20:14,640 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 17:20:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:14,641 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 17:20:14,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 17:20:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 17:20:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 17:20:14,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:14,643 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:14,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 17:20:14,643 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 17:20:14,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:14,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962504778] [2020-08-21 17:20:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:14,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 17:20:16,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962504778] [2020-08-21 17:20:16,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:16,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-21 17:20:16,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794364057] [2020-08-21 17:20:16,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-21 17:20:16,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-21 17:20:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 17:20:16,896 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-21 17:20:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:17,733 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 17:20:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-21 17:20:17,734 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-21 17:20:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:17,735 INFO L225 Difference]: With dead ends: 82 [2020-08-21 17:20:17,735 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 17:20:17,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 17:20:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 17:20:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 17:20:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 17:20:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 17:20:17,744 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 17:20:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:17,747 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 17:20:17,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-21 17:20:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 17:20:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 17:20:17,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:17,749 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:17,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 17:20:17,749 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:17,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 17:20:17,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:17,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652977940] [2020-08-21 17:20:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:17,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 17:20:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:17,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:17,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:20:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 17:20:19,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652977940] [2020-08-21 17:20:19,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:20:19,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 17:20:19,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684141687] [2020-08-21 17:20:19,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 17:20:19,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 17:20:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:20:19,181 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 17:20:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:20,690 INFO L93 Difference]: Finished difference Result 197 states and 638 transitions. [2020-08-21 17:20:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-21 17:20:20,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 17:20:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:20,694 INFO L225 Difference]: With dead ends: 197 [2020-08-21 17:20:20,694 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:20:20,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1489, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 17:20:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:20:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:20:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:20:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:20:20,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-08-21 17:20:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:20,698 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:20:20,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 17:20:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:20:20,698 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:20:20,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 17:20:20,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:20:20,863 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:20:20,863 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:20,863 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:20,864 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:20:20,864 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:20:20,864 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:20:20,864 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 17:20:20,864 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 17:20:20,864 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 17:20:20,864 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 17:20:20,864 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 17:20:20,865 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 20) (<= 20 main_~input~0)) [2020-08-21 17:20:20,865 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 17:20:20,865 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 17:20:20,865 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 17:20:20,865 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 17:20:20,865 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 17:20:20,865 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 17:20:20,866 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 17:20:20,866 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 17:20:20,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:20:20 BoogieIcfgContainer [2020-08-21 17:20:20,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:20:20,875 INFO L168 Benchmark]: Toolchain (without parser) took 19698.60 ms. Allocated memory was 139.5 MB in the beginning and 479.2 MB in the end (delta: 339.7 MB). Free memory was 102.9 MB in the beginning and 393.7 MB in the end (delta: -290.8 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,875 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,877 INFO L168 Benchmark]: Boogie Preprocessor took 189.68 ms. Allocated memory was 139.5 MB in the beginning and 206.0 MB in the end (delta: 66.6 MB). Free memory was 93.4 MB in the beginning and 184.6 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,877 INFO L168 Benchmark]: RCFGBuilder took 252.80 ms. Allocated memory is still 206.0 MB. Free memory was 184.6 MB in the beginning and 173.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,878 INFO L168 Benchmark]: TraceAbstraction took 18814.06 ms. Allocated memory was 206.0 MB in the beginning and 479.2 MB in the end (delta: 273.2 MB). Free memory was 172.5 MB in the beginning and 393.7 MB in the end (delta: -221.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:20,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 429.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 189.68 ms. Allocated memory was 139.5 MB in the beginning and 206.0 MB in the end (delta: 66.6 MB). Free memory was 93.4 MB in the beginning and 184.6 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.80 ms. Allocated memory is still 206.0 MB. Free memory was 184.6 MB in the beginning and 173.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18814.06 ms. Allocated memory was 206.0 MB in the beginning and 479.2 MB in the end (delta: 273.2 MB). Free memory was 172.5 MB in the beginning and 393.7 MB in the end (delta: -221.1 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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: 18.5s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 657 SDslu, 3302 SDs, 0 SdLazy, 3411 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1122 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 49 PreInvPairs, 49 NumberOfFragments, 15 HoareAnnotationTreeSize, 49 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 241 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1650 ConstructedInterpolants, 0 QuantifiedInterpolants, 417408 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 5712/10164 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...