/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=HIGHLEXORDER --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_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:56:35,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:56:35,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:56:35,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:56:35,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:56:35,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:56:35,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:56:35,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:56:35,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:56:35,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:56:35,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:56:35,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:56:35,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:56:35,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:56:35,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:56:35,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:56:35,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:56:35,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:56:35,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:56:35,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:56:35,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:56:35,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:56:35,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:56:35,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:56:35,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:56:35,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:56:35,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:56:35,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:56:35,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:56:35,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:56:35,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:56:35,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:56:35,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:56:35,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:56:35,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:56:35,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:56:35,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:56:35,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:56:35,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:56:35,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:56:35,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:56:35,241 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 18:56:35,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:56:35,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:56:35,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:56:35,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:56:35,286 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:56:35,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:56:35,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:56:35,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:56:35,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:56:35,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:56:35,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:56:35,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:56:35,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:56:35,289 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:56:35,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:56:35,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:56:35,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:56:35,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:56:35,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:56:35,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:56:35,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:56:35,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:56:35,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:56:35,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:56:35,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:56:35,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:56:35,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:56:35,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:56:35,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:56:35,293 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=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:56:35,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:56:35,645 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:56:35,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:56:35,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:56:35,655 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:56:35,656 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 18:56:35,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2d1b4ff/d29cd3eb330e4522bbd94cb2be4235ab/FLAGae4c9fb7c [2020-08-21 18:56:36,149 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:56:36,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 18:56:36,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2d1b4ff/d29cd3eb330e4522bbd94cb2be4235ab/FLAGae4c9fb7c [2020-08-21 18:56:36,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2d1b4ff/d29cd3eb330e4522bbd94cb2be4235ab [2020-08-21 18:56:36,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:56:36,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:56:36,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:56:36,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:56:36,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:56:36,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a477604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36, skipping insertion in model container [2020-08-21 18:56:36,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:56:36,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:56:36,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:56:36,751 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:56:36,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:56:36,775 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:56:36,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36 WrapperNode [2020-08-21 18:56:36,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:56:36,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:56:36,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:56:36,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:56:36,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (1/1) ... [2020-08-21 18:56:36,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:56:36,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:56:36,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:56:36,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:56:36,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (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 18:56:36,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:56:36,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:56:36,949 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 18:56:36,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:56:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:56:37,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:56:37,129 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:56:37,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:56:37 BoogieIcfgContainer [2020-08-21 18:56:37,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:56:37,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:56:37,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:56:37,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:56:37,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:56:36" (1/3) ... [2020-08-21 18:56:37,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38228aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:56:37, skipping insertion in model container [2020-08-21 18:56:37,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:56:36" (2/3) ... [2020-08-21 18:56:37,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38228aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:56:37, skipping insertion in model container [2020-08-21 18:56:37,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:56:37" (3/3) ... [2020-08-21 18:56:37,141 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-08-21 18:56:37,151 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:56:37,159 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:56:37,173 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:56:37,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:56:37,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:56:37,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:56:37,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:56:37,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:56:37,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:56:37,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:56:37,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:56:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 18:56:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:56:37,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:37,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:37,225 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 18:56:37,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:37,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487941986] [2020-08-21 18:56:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,592 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 18:56:37,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487941986] [2020-08-21 18:56:37,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:56:37,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:56:37,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307399598] [2020-08-21 18:56:37,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:56:37,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:56:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:56:37,628 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 18:56:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:37,758 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 18:56:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:56:37,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 18:56:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:37,770 INFO L225 Difference]: With dead ends: 30 [2020-08-21 18:56:37,770 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 18:56:37,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:56:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 18:56:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 18:56:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 18:56:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 18:56:37,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 18:56:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:37,818 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 18:56:37,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:56:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 18:56:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:56:37,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:37,820 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 18:56:37,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:56:37,821 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 18:56:37,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:37,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212789754] [2020-08-21 18:56:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:37,953 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 18:56:37,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212789754] [2020-08-21 18:56:37,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:37,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:56:37,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226716878] [2020-08-21 18:56:37,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:56:37,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:56:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:56:37,958 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 18:56:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:38,029 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 18:56:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:56:38,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 18:56:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:38,031 INFO L225 Difference]: With dead ends: 25 [2020-08-21 18:56:38,031 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 18:56:38,033 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 18:56:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 18:56:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 18:56:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:56:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 18:56:38,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 18:56:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:38,041 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 18:56:38,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:56:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 18:56:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:56:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:38,043 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 18:56:38,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:56:38,043 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:38,044 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 18:56:38,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:38,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656786845] [2020-08-21 18:56:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,188 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 18:56:38,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656786845] [2020-08-21 18:56:38,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:38,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:56:38,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523164183] [2020-08-21 18:56:38,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:56:38,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:38,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:56:38,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:56:38,191 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 18:56:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:38,256 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 18:56:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:56:38,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 18:56:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:38,258 INFO L225 Difference]: With dead ends: 28 [2020-08-21 18:56:38,258 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 18:56:38,259 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 18:56:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 18:56:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 18:56:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:56:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 18:56:38,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 18:56:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:38,267 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 18:56:38,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:56:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 18:56:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:56:38,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:38,269 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 18:56:38,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:56:38,270 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 18:56:38,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:38,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358997589] [2020-08-21 18:56:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,453 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 18:56:38,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358997589] [2020-08-21 18:56:38,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:38,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:56:38,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504475328] [2020-08-21 18:56:38,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:56:38,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:56:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:56:38,457 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 18:56:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:38,555 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 18:56:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:56:38,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 18:56:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:38,558 INFO L225 Difference]: With dead ends: 31 [2020-08-21 18:56:38,558 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 18:56:38,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:56:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 18:56:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 18:56:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 18:56:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 18:56:38,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 18:56:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:38,566 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 18:56:38,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:56:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 18:56:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 18:56:38,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:38,568 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 18:56:38,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:56:38,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 18:56:38,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:38,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834932179] [2020-08-21 18:56:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,834 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 18:56:38,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834932179] [2020-08-21 18:56:38,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:38,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:56:38,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606060499] [2020-08-21 18:56:38,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:56:38,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:38,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:56:38,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:56:38,838 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 18:56:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:38,922 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 18:56:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:56:38,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 18:56:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:38,924 INFO L225 Difference]: With dead ends: 34 [2020-08-21 18:56:38,924 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 18:56:38,925 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 18:56:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 18:56:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 18:56:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:56:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 18:56:38,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 18:56:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:38,933 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 18:56:38,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:56:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 18:56:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 18:56:38,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:38,935 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 18:56:38,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:56:38,935 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:38,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 18:56:38,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:38,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50748510] [2020-08-21 18:56:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:38,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,108 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 18:56:39,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50748510] [2020-08-21 18:56:39,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:39,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:56:39,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765585307] [2020-08-21 18:56:39,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:56:39,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:39,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:56:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:56:39,111 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 18:56:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:39,204 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 18:56:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:56:39,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 18:56:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:39,206 INFO L225 Difference]: With dead ends: 37 [2020-08-21 18:56:39,206 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 18:56:39,207 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 18:56:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 18:56:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 18:56:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 18:56:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 18:56:39,214 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 18:56:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:39,215 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 18:56:39,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:56:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 18:56:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 18:56:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:39,217 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 18:56:39,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:56:39,218 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 18:56:39,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:39,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687948275] [2020-08-21 18:56:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,420 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 18:56:39,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687948275] [2020-08-21 18:56:39,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:39,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:56:39,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928929916] [2020-08-21 18:56:39,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:56:39,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:56:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:56:39,423 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 18:56:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:39,533 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 18:56:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:56:39,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 18:56:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:39,535 INFO L225 Difference]: With dead ends: 40 [2020-08-21 18:56:39,536 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 18:56:39,536 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 18:56:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 18:56:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 18:56:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:56:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 18:56:39,543 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 18:56:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:39,544 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 18:56:39,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:56:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 18:56:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 18:56:39,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:39,545 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 18:56:39,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:56:39,546 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 18:56:39,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:39,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680480083] [2020-08-21 18:56:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,760 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 18:56:39,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680480083] [2020-08-21 18:56:39,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:39,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:56:39,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125699591] [2020-08-21 18:56:39,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:56:39,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:56:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:56:39,763 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 18:56:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:39,883 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 18:56:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:56:39,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 18:56:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:39,885 INFO L225 Difference]: With dead ends: 43 [2020-08-21 18:56:39,886 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 18:56:39,887 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 18:56:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 18:56:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 18:56:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:56:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 18:56:39,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 18:56:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:39,894 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 18:56:39,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:56:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 18:56:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:56:39,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:39,896 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 18:56:39,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:56:39,896 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 18:56:39,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:39,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589865906] [2020-08-21 18:56:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:39,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,261 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 18:56:40,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589865906] [2020-08-21 18:56:40,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:40,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:56:40,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562935067] [2020-08-21 18:56:40,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:56:40,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:40,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:56:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:56:40,269 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 18:56:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:40,406 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 18:56:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:56:40,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 18:56:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:40,408 INFO L225 Difference]: With dead ends: 46 [2020-08-21 18:56:40,408 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 18:56:40,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:56:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 18:56:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 18:56:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:56:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 18:56:40,417 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 18:56:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:40,417 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 18:56:40,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:56:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 18:56:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 18:56:40,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:40,419 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 18:56:40,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:56:40,420 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 18:56:40,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:40,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549726249] [2020-08-21 18:56:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,728 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 18:56:40,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549726249] [2020-08-21 18:56:40,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:40,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:56:40,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994771138] [2020-08-21 18:56:40,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:56:40,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:40,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:56:40,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:56:40,731 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 18:56:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:40,892 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 18:56:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:56:40,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 18:56:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:40,893 INFO L225 Difference]: With dead ends: 49 [2020-08-21 18:56:40,894 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 18:56:40,897 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 18:56:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 18:56:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 18:56:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:56:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 18:56:40,908 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 18:56:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:40,910 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 18:56:40,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:56:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 18:56:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 18:56:40,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:40,913 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 18:56:40,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:56:40,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 18:56:40,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:40,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633880782] [2020-08-21 18:56:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:40,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,260 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 18:56:41,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633880782] [2020-08-21 18:56:41,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:41,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:56:41,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053456304] [2020-08-21 18:56:41,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:56:41,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:56:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:56:41,265 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 18:56:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:41,431 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 18:56:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:56:41,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 18:56:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:41,433 INFO L225 Difference]: With dead ends: 52 [2020-08-21 18:56:41,434 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 18:56:41,435 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 18:56:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 18:56:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 18:56:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 18:56:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 18:56:41,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 18:56:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:41,447 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 18:56:41,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:56:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 18:56:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 18:56:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:41,450 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 18:56:41,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:56:41,451 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 18:56:41,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:41,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97890915] [2020-08-21 18:56:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:41,863 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 18:56:41,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97890915] [2020-08-21 18:56:41,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:41,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:56:41,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65707822] [2020-08-21 18:56:41,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:56:41,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:56:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:56:41,866 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 18:56:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:42,045 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 18:56:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:56:42,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 18:56:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:42,047 INFO L225 Difference]: With dead ends: 55 [2020-08-21 18:56:42,047 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 18:56:42,048 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 18:56:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 18:56:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 18:56:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 18:56:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 18:56:42,054 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 18:56:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:42,054 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 18:56:42,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:56:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 18:56:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 18:56:42,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:42,055 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 18:56:42,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:56:42,056 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 18:56:42,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:42,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012462756] [2020-08-21 18:56:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,485 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 18:56:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012462756] [2020-08-21 18:56:42,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:42,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:56:42,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596804852] [2020-08-21 18:56:42,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:56:42,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:56:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:56:42,487 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 18:56:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:42,718 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 18:56:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:56:42,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 18:56:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:42,720 INFO L225 Difference]: With dead ends: 58 [2020-08-21 18:56:42,721 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 18:56:42,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 18:56:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 18:56:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 18:56:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 18:56:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 18:56:42,727 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 18:56:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:42,728 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 18:56:42,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:56:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 18:56:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 18:56:42,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:42,729 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 18:56:42,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:56:42,730 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 18:56:42,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:42,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869132990] [2020-08-21 18:56:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:42,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,285 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 18:56:43,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869132990] [2020-08-21 18:56:43,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:43,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:56:43,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79624918] [2020-08-21 18:56:43,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:56:43,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:56:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:56:43,288 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 18:56:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:43,483 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 18:56:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:56:43,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 18:56:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:43,485 INFO L225 Difference]: With dead ends: 61 [2020-08-21 18:56:43,485 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 18:56:43,486 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 18:56:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 18:56:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 18:56:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 18:56:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 18:56:43,492 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 18:56:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:43,492 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 18:56:43,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:56:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 18:56:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 18:56:43,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:43,493 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 18:56:43,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:56:43,494 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 18:56:43,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:43,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316916236] [2020-08-21 18:56:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:43,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,062 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 18:56:44,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316916236] [2020-08-21 18:56:44,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:44,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:56:44,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632777352] [2020-08-21 18:56:44,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:56:44,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:56:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:56:44,065 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 18:56:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:44,305 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 18:56:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:56:44,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 18:56:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:44,307 INFO L225 Difference]: With dead ends: 64 [2020-08-21 18:56:44,307 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 18:56:44,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:56:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 18:56:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 18:56:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 18:56:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 18:56:44,313 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 18:56:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:44,314 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 18:56:44,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:56:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 18:56:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 18:56:44,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:44,315 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 18:56:44,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:56:44,316 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 18:56:44,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:44,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557907328] [2020-08-21 18:56:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:44,892 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 18:56:44,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557907328] [2020-08-21 18:56:44,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:44,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 18:56:44,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275656585] [2020-08-21 18:56:44,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 18:56:44,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 18:56:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:56:44,895 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 18:56:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:45,126 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 18:56:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:56:45,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 18:56:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:45,128 INFO L225 Difference]: With dead ends: 67 [2020-08-21 18:56:45,128 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 18:56:45,130 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 18:56:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 18:56:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 18:56:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 18:56:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 18:56:45,135 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 18:56:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:45,136 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 18:56:45,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 18:56:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 18:56:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 18:56:45,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:45,137 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 18:56:45,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:56:45,138 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 18:56:45,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:45,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691767334] [2020-08-21 18:56:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:45,833 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 18:56:45,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691767334] [2020-08-21 18:56:45,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:45,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 18:56:45,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864284609] [2020-08-21 18:56:45,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 18:56:45,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 18:56:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:56:45,835 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 18:56:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:46,084 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 18:56:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:56:46,084 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 18:56:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:46,086 INFO L225 Difference]: With dead ends: 70 [2020-08-21 18:56:46,086 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 18:56:46,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 18:56:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 18:56:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 18:56:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 18:56:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 18:56:46,094 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 18:56:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 18:56:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 18:56:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 18:56:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 18:56:46,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:46,097 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 18:56:46,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:56:46,098 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 18:56:46,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:46,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530677613] [2020-08-21 18:56:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:46,858 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 18:56:46,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530677613] [2020-08-21 18:56:46,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:46,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:56:46,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147024070] [2020-08-21 18:56:46,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:56:46,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:56:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:56:46,865 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 18:56:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:47,149 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 18:56:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:56:47,150 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 18:56:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:47,151 INFO L225 Difference]: With dead ends: 73 [2020-08-21 18:56:47,151 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 18:56:47,153 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 18:56:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 18:56:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 18:56:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 18:56:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 18:56:47,163 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 18:56:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:47,163 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 18:56:47,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:56:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 18:56:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 18:56:47,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:47,166 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 18:56:47,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:56:47,167 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 18:56:47,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:47,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267965051] [2020-08-21 18:56:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,056 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 18:56:48,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267965051] [2020-08-21 18:56:48,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:48,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 18:56:48,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576992146] [2020-08-21 18:56:48,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 18:56:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 18:56:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:56:48,060 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 18:56:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:48,337 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 18:56:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 18:56:48,338 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 18:56:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:48,339 INFO L225 Difference]: With dead ends: 76 [2020-08-21 18:56:48,339 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 18:56:48,340 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 18:56:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 18:56:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 18:56:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 18:56:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 18:56:48,346 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 18:56:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:48,346 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 18:56:48,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 18:56:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 18:56:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 18:56:48,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:48,348 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 18:56:48,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:56:48,348 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 18:56:48,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:48,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549682095] [2020-08-21 18:56:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:48,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,284 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 18:56:49,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549682095] [2020-08-21 18:56:49,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:49,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 18:56:49,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718216084] [2020-08-21 18:56:49,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 18:56:49,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 18:56:49,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:56:49,287 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 18:56:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:49,571 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 18:56:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:56:49,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 18:56:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:49,572 INFO L225 Difference]: With dead ends: 79 [2020-08-21 18:56:49,573 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 18:56:49,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 18:56:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 18:56:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 18:56:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 18:56:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 18:56:49,578 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 18:56:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:49,579 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 18:56:49,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 18:56:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 18:56:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 18:56:49,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:49,580 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 18:56:49,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:56:49,581 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 18:56:49,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:49,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440818359] [2020-08-21 18:56:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:49,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,561 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 18:56:50,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440818359] [2020-08-21 18:56:50,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:50,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 18:56:50,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790164450] [2020-08-21 18:56:50,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 18:56:50,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 18:56:50,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:56:50,564 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-21 18:56:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:50,886 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 18:56:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 18:56:50,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-21 18:56:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:50,888 INFO L225 Difference]: With dead ends: 82 [2020-08-21 18:56:50,888 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 18:56:50,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 18:56:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 18:56:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 18:56:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 18:56:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 18:56:50,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 18:56:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:50,899 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 18:56:50,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 18:56:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 18:56:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 18:56:50,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:50,902 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 18:56:50,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:56:50,902 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 18:56:50,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:50,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763653225] [2020-08-21 18:56:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:50,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 18:56:51,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763653225] [2020-08-21 18:56:51,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:51,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:56:51,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590408516] [2020-08-21 18:56:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:56:51,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:56:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:56:51,840 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 18:56:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:52,174 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 18:56:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 18:56:52,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 18:56:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:52,177 INFO L225 Difference]: With dead ends: 85 [2020-08-21 18:56:52,178 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 18:56:52,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 18:56:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 18:56:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 18:56:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 18:56:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 18:56:52,189 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 18:56:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:52,190 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 18:56:52,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:56:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 18:56:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 18:56:52,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:52,193 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:52,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:56:52,193 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 18:56:52,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:52,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137027236] [2020-08-21 18:56:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 18:56:53,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137027236] [2020-08-21 18:56:53,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:53,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 18:56:53,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567176149] [2020-08-21 18:56:53,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 18:56:53,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 18:56:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:56:53,685 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-21 18:56:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:54,067 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 18:56:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 18:56:54,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-21 18:56:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:54,074 INFO L225 Difference]: With dead ends: 88 [2020-08-21 18:56:54,074 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 18:56:54,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 18:56:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 18:56:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 18:56:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 18:56:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 18:56:54,082 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 18:56:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:54,082 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 18:56:54,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 18:56:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 18:56:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 18:56:54,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:54,084 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:54,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:56:54,085 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 18:56:54,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:54,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873268585] [2020-08-21 18:56:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 18:56:55,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873268585] [2020-08-21 18:56:55,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:55,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:56:55,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646313806] [2020-08-21 18:56:55,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:56:55,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:56:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:56:55,342 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-21 18:56:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:55,823 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 18:56:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 18:56:55,824 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-21 18:56:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:55,825 INFO L225 Difference]: With dead ends: 91 [2020-08-21 18:56:55,825 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 18:56:55,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 18:56:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 18:56:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 18:56:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 18:56:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 18:56:55,832 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 18:56:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:55,832 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 18:56:55,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:56:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 18:56:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 18:56:55,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:55,836 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:55,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:56:55,839 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 18:56:55,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:55,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811667101] [2020-08-21 18:56:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:55,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:56,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 18:56:57,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811667101] [2020-08-21 18:56:57,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:56:57,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 18:56:57,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440414432] [2020-08-21 18:56:57,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 18:56:57,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:56:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 18:56:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 18:56:57,140 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-21 18:56:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:56:57,519 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 18:56:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 18:56:57,520 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-21 18:56:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:56:57,522 INFO L225 Difference]: With dead ends: 94 [2020-08-21 18:56:57,522 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 18:56:57,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 18:56:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 18:56:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 18:56:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 18:56:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 18:56:57,528 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 18:56:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:56:57,528 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 18:56:57,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 18:56:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 18:56:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 18:56:57,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:56:57,530 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:56:57,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:56:57,531 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:56:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:56:57,531 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 18:56:57,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:56:57,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802121415] [2020-08-21 18:56:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:56:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:56:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:56:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:57,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:58,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:56:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:56:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:00,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:00,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-21 18:57:00,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802121415] [2020-08-21 18:57:00,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:00,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-21 18:57:00,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594199453] [2020-08-21 18:57:00,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-21 18:57:00,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:00,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-21 18:57:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 18:57:00,469 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-21 18:57:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:01,890 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-21 18:57:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-21 18:57:01,891 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-21 18:57:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:01,893 INFO L225 Difference]: With dead ends: 97 [2020-08-21 18:57:01,893 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 18:57:01,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 18:57:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 18:57:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 18:57:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 18:57:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-21 18:57:01,899 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-21 18:57:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:01,899 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-21 18:57:01,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-21 18:57:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-21 18:57:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-21 18:57:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:01,901 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:01,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 18:57:01,902 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-21 18:57:01,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:01,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767924996] [2020-08-21 18:57:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:01,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:01,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-21 18:57:03,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767924996] [2020-08-21 18:57:03,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:03,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 18:57:03,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91053490] [2020-08-21 18:57:03,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 18:57:03,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 18:57:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-21 18:57:03,637 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-08-21 18:57:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:04,385 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-08-21 18:57:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 18:57:04,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-08-21 18:57:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:04,389 INFO L225 Difference]: With dead ends: 93 [2020-08-21 18:57:04,389 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:57:04,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1142, Invalid=2164, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 18:57:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:57:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:57:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:57:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:57:04,391 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-08-21 18:57:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:04,391 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:57:04,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 18:57:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:57:04,392 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:57:04,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 18:57:04,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:57:04,416 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:57:04,416 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:04,416 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:04,416 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:57:04,416 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:57:04,417 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:57:04,417 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 18:57:04,418 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 18:57:04,418 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 18:57:04,418 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 18:57:04,418 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 18:57:04,419 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-08-21 18:57:04,419 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 18:57:04,419 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 18:57:04,419 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 18:57:04,420 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 18:57:04,420 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 18:57:04,420 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 18:57:04,420 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 18:57:04,420 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 18:57:04,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:57:04 BoogieIcfgContainer [2020-08-21 18:57:04,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:57:04,429 INFO L168 Benchmark]: Toolchain (without parser) took 27883.22 ms. Allocated memory was 139.5 MB in the beginning and 695.7 MB in the end (delta: 556.3 MB). Free memory was 102.8 MB in the beginning and 458.4 MB in the end (delta: -355.6 MB). Peak memory consumption was 200.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:04,429 INFO L168 Benchmark]: CDTParser took 0.21 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:57:04,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.96 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 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 18:57:04,430 INFO L168 Benchmark]: Boogie Preprocessor took 105.93 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:04,431 INFO L168 Benchmark]: RCFGBuilder took 250.22 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:04,431 INFO L168 Benchmark]: TraceAbstraction took 27291.56 ms. Allocated memory was 202.4 MB in the beginning and 695.7 MB in the end (delta: 493.4 MB). Free memory was 169.5 MB in the beginning and 458.4 MB in the end (delta: -288.9 MB). Peak memory consumption was 204.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:04,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.96 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 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 105.93 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.22 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27291.56 ms. Allocated memory was 202.4 MB in the beginning and 695.7 MB in the end (delta: 493.4 MB). Free memory was 169.5 MB in the beginning and 458.4 MB in the end (delta: -288.9 MB). Peak memory consumption was 204.5 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: 27.1s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 4695 SDs, 0 SdLazy, 3193 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1647 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, 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, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 2457 NumberOfCodeBlocks, 2457 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 2430 ConstructedInterpolants, 0 QuantifiedInterpolants, 744336 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 10452/18954 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...