/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:19:06,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:19:06,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:19:06,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:19:06,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:19:06,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:19:06,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:19:06,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:19:06,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:19:06,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:19:06,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:19:06,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:19:06,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:19:06,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:19:06,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:19:06,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:19:06,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:19:06,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:19:06,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:19:06,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:19:06,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:19:06,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:19:06,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:19:06,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:19:06,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:19:06,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:19:06,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:19:06,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:19:06,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:19:06,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:19:06,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:19:06,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:19:06,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:19:06,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:19:06,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:19:06,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:19:06,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:19:06,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:19:06,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:19:06,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:19:06,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:19:06,371 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 [2020-09-25 02:19:06,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:19:06,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:19:06,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:19:06,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:19:06,400 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:19:06,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:19:06,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:19:06,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:19:06,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:19:06,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:19:06,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:19:06,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:19:06,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:19:06,402 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:19:06,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:19:06,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:19:06,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:19:06,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:19:06,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:19:06,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:19:06,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:19:06,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:06,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:19:06,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:19:06,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:19:06,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:19:06,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:19:06,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:19:06,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:19:06,405 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:19:06,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:19:06,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:19:06,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:19:06,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:19:06,902 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:19:06,903 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 02:19:07,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3a883da0/6343cddfcd3b4ecc9e56341172a98613/FLAGf5d2142d9 [2020-09-25 02:19:07,583 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:07,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 02:19:07,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3a883da0/6343cddfcd3b4ecc9e56341172a98613/FLAGf5d2142d9 [2020-09-25 02:19:07,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3a883da0/6343cddfcd3b4ecc9e56341172a98613 [2020-09-25 02:19:07,936 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:07,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:07,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:07,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:07,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:07,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:07" (1/1) ... [2020-09-25 02:19:07,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3d6b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:07, skipping insertion in model container [2020-09-25 02:19:07,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:07" (1/1) ... [2020-09-25 02:19:07,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:07,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:08,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:08,242 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:08,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:08,272 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:08,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08 WrapperNode [2020-09-25 02:19:08,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:08,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:08,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:08,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:08,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (1/1) ... [2020-09-25 02:19:08,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:08,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:08,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:08,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:08,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (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 [2020-09-25 02:19:08,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:08,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:08,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:19:08,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:08,673 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:08,673 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:19:08,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:08 BoogieIcfgContainer [2020-09-25 02:19:08,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:08,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:08,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:08,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:08,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:07" (1/3) ... [2020-09-25 02:19:08,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3ba59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:08, skipping insertion in model container [2020-09-25 02:19:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:08" (2/3) ... [2020-09-25 02:19:08,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3ba59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:08, skipping insertion in model container [2020-09-25 02:19:08,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:08" (3/3) ... [2020-09-25 02:19:08,701 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-09-25 02:19:08,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:08,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:19:08,792 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:19:08,824 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:08,824 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:08,824 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:08,824 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:08,825 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:08,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:08,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:08,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-25 02:19:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 02:19:08,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-09-25 02:19:08,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911343970] [2020-09-25 02:19:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:19:09,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:09,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 02:19:09,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 02:19:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:19:09,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:09,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:19:09,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:09,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911343970] [2020-09-25 02:19:09,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:09,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:19:09,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61443046] [2020-09-25 02:19:09,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:19:09,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:19:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:09,180 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-09-25 02:19:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,210 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-09-25 02:19:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:19:09,212 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 02:19:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,223 INFO L225 Difference]: With dead ends: 34 [2020-09-25 02:19:09,224 INFO L226 Difference]: Without dead ends: 17 [2020-09-25 02:19:09,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-25 02:19:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-25 02:19:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 02:19:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 02:19:09,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2020-09-25 02:19:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,285 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 02:19:09,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:19:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 02:19:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 02:19:09,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:09,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash 121681208, now seen corresponding path program 1 times [2020-09-25 02:19:09,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114029922] [2020-09-25 02:19:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:19:09,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:09,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-09-25 02:19:09,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:09,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:19:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:09,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:19:09,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:09,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114029922] [2020-09-25 02:19:09,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:09,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:19:09,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322491734] [2020-09-25 02:19:09,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:19:09,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:19:09,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:09,507 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-09-25 02:19:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,533 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-09-25 02:19:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:19:09,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 02:19:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,536 INFO L225 Difference]: With dead ends: 26 [2020-09-25 02:19:09,536 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 02:19:09,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 02:19:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-09-25 02:19:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 02:19:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-25 02:19:09,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-09-25 02:19:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,544 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-25 02:19:09,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:19:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-25 02:19:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 02:19:09,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:09,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-09-25 02:19:09,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814111112] [2020-09-25 02:19:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 02:19:09,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-25 02:19:09,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 02:19:09,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:19:09,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:09,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:09,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:09,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814111112] [2020-09-25 02:19:09,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:09,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 02:19:09,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416902007] [2020-09-25 02:19:09,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:09,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:09,766 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-09-25 02:19:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,842 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 02:19:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:19:09,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 02:19:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,844 INFO L225 Difference]: With dead ends: 31 [2020-09-25 02:19:09,844 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 02:19:09,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 02:19:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-09-25 02:19:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 02:19:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-25 02:19:09,851 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-09-25 02:19:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,851 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-25 02:19:09,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-25 02:19:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 02:19:09,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:09,853 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-09-25 02:19:09,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352541664] [2020-09-25 02:19:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:19:09,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 02:19:09,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:19:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:10,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:10,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:10,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:10,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:10,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:10,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:10,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352541664] [2020-09-25 02:19:10,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:10,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:19:10,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126074859] [2020-09-25 02:19:10,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:19:10,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:19:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:10,030 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-25 02:19:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:10,128 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 02:19:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:19:10,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 02:19:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:10,130 INFO L225 Difference]: With dead ends: 36 [2020-09-25 02:19:10,131 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 02:19:10,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 02:19:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 02:19:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 02:19:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-25 02:19:10,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-25 02:19:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:10,160 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-25 02:19:10,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:19:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-25 02:19:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:19:10,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:10,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:10,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:10,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-09-25 02:19:10,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:10,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704081387] [2020-09-25 02:19:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:19:10,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-25 02:19:10,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:19:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:10,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:10,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:10,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:10,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704081387] [2020-09-25 02:19:10,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:10,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:19:10,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639645658] [2020-09-25 02:19:10,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:19:10,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:19:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:19:10,475 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2020-09-25 02:19:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:10,599 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 02:19:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:19:10,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-25 02:19:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:10,603 INFO L225 Difference]: With dead ends: 41 [2020-09-25 02:19:10,603 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 02:19:10,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:19:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 02:19:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-25 02:19:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 02:19:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-25 02:19:10,611 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-09-25 02:19:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:10,611 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-25 02:19:10,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:19:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-25 02:19:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 02:19:10,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:10,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:10,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:10,613 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-09-25 02:19:10,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:10,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979141329] [2020-09-25 02:19:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 02:19:10,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-25 02:19:10,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 02:19:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:10,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979141329] [2020-09-25 02:19:10,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:10,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:19:10,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959643193] [2020-09-25 02:19:10,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:19:10,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:19:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:10,877 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2020-09-25 02:19:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:11,045 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 02:19:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:19:11,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-25 02:19:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:11,047 INFO L225 Difference]: With dead ends: 46 [2020-09-25 02:19:11,048 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 02:19:11,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:19:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 02:19:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-25 02:19:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 02:19:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 02:19:11,055 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-09-25 02:19:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:11,056 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 02:19:11,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:19:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 02:19:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 02:19:11,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:11,058 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:11,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:11,058 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:11,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-09-25 02:19:11,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:11,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239235010] [2020-09-25 02:19:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:11,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:11,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 02:19:11,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:11,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-09-25 02:19:11,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:19:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 02:19:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:11,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:11,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:11,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:11,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:11,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:11,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:11,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:11,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:19:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:11,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239235010] [2020-09-25 02:19:11,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:11,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:19:11,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421430032] [2020-09-25 02:19:11,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:19:11,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:11,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:19:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:11,552 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2020-09-25 02:19:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:11,791 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 02:19:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:19:11,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-25 02:19:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:11,793 INFO L225 Difference]: With dead ends: 51 [2020-09-25 02:19:11,793 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 02:19:11,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 02:19:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 02:19:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-25 02:19:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 02:19:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-25 02:19:11,801 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-09-25 02:19:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:11,802 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-25 02:19:11,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:19:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-25 02:19:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 02:19:11,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:11,803 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:11,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:11,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:11,804 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-09-25 02:19:11,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:11,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124208837] [2020-09-25 02:19:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 02:19:12,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-09-25 02:19:12,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:19:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 02:19:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:12,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:12,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:12,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:12,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:12,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:12,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124208837] [2020-09-25 02:19:12,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:12,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 02:19:12,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902934611] [2020-09-25 02:19:12,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 02:19:12,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 02:19:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:19:12,232 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 15 states. [2020-09-25 02:19:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:12,528 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 02:19:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 02:19:12,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-25 02:19:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:12,530 INFO L225 Difference]: With dead ends: 56 [2020-09-25 02:19:12,530 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 02:19:12,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 02:19:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 02:19:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-25 02:19:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 02:19:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-25 02:19:12,537 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-09-25 02:19:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:12,538 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-25 02:19:12,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 02:19:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-25 02:19:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 02:19:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:12,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:12,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:12,540 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-09-25 02:19:12,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:12,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019808741] [2020-09-25 02:19:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 02:19:12,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-25 02:19:12,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 02:19:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 02:19:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:13,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:13,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:13,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019808741] [2020-09-25 02:19:13,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 02:19:13,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563081501] [2020-09-25 02:19:13,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 02:19:13,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 02:19:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:19:13,048 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2020-09-25 02:19:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:13,304 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 02:19:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 02:19:13,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-09-25 02:19:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:13,306 INFO L225 Difference]: With dead ends: 58 [2020-09-25 02:19:13,306 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 02:19:13,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 02:19:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 02:19:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 02:19:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 02:19:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-25 02:19:13,312 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-09-25 02:19:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:13,313 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-25 02:19:13,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 02:19:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-25 02:19:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 02:19:13,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:13,315 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:13,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:13,315 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-09-25 02:19:13,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:13,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436327654] [2020-09-25 02:19:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 02:19:13,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-25 02:19:13,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:19:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:19:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 02:19:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:13,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:13,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:13,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436327654] [2020-09-25 02:19:13,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:19:13,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298087568] [2020-09-25 02:19:13,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:19:13,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:19:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:13,754 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 13 states. [2020-09-25 02:19:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:13,847 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-09-25 02:19:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:19:13,848 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-25 02:19:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:13,849 INFO L225 Difference]: With dead ends: 64 [2020-09-25 02:19:13,849 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 02:19:13,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:19:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 02:19:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 02:19:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 02:19:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-09-25 02:19:13,855 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-09-25 02:19:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:13,856 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-09-25 02:19:13,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:19:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-09-25 02:19:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 02:19:13,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:13,857 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:13,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:19:13,858 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1401826219, now seen corresponding path program 9 times [2020-09-25 02:19:13,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:13,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738379096] [2020-09-25 02:19:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 02:19:14,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:14,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:14,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:14,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:14,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 160 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:14,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738379096] [2020-09-25 02:19:14,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:14,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 02:19:14,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727323600] [2020-09-25 02:19:14,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 02:19:14,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 02:19:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:19:14,423 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2020-09-25 02:19:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:14,757 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 02:19:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 02:19:14,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-09-25 02:19:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:14,758 INFO L225 Difference]: With dead ends: 58 [2020-09-25 02:19:14,759 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:19:14,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 02:19:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:19:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:19:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:19:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:19:14,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-25 02:19:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:14,762 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:19:14,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 02:19:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:19:14,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:19:14,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:19:14,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:19:15,009 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-09-25 02:19:15,015 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 02:19:15,015 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:15,015 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:15,016 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 02:19:15,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:19:15,016 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:19:15,016 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-25 02:19:15,016 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-09-25 02:19:15,016 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 02:19:15,016 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-25 02:19:15,016 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-09-25 02:19:15,017 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-25 02:19:15,017 INFO L268 CegarLoopResult]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2020-09-25 02:19:15,017 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-25 02:19:15,017 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-25 02:19:15,017 INFO L264 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= 9 main_~i~0) (or (= main_~sn~0 0) (= 16 main_~sn~0))) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 0 main_~sn~0) (<= main_~sn~0 0) (= main_~i~0 1)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-09-25 02:19:15,018 INFO L264 CegarLoopResult]: At program point L13-7(lines 13 15) the Hoare annotation is: (or (= main_~sn~0 0) (= 16 main_~sn~0)) [2020-09-25 02:19:15,018 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 02:19:15,018 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 02:19:15,018 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 02:19:15,018 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 02:19:15,018 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 02:19:15,018 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 02:19:15,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:19:15 BoogieIcfgContainer [2020-09-25 02:19:15,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:19:15,046 INFO L168 Benchmark]: Toolchain (without parser) took 7108.16 ms. Allocated memory was 147.3 MB in the beginning and 278.9 MB in the end (delta: 131.6 MB). Free memory was 103.8 MB in the beginning and 211.3 MB in the end (delta: -107.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,047 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.77 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,049 INFO L168 Benchmark]: Boogie Preprocessor took 125.38 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 182.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,050 INFO L168 Benchmark]: RCFGBuilder took 280.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,051 INFO L168 Benchmark]: TraceAbstraction took 6355.09 ms. Allocated memory was 203.4 MB in the beginning and 278.9 MB in the end (delta: 75.5 MB). Free memory was 170.0 MB in the beginning and 211.3 MB in the end (delta: -41.3 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:15,055 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.77 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.38 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 182.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6355.09 ms. Allocated memory was 203.4 MB in the beginning and 278.9 MB in the end (delta: 75.5 MB). Free memory was 170.0 MB in the beginning and 211.3 MB in the end (delta: -41.3 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (9 <= i && (sn == 0 || 16 == sn))) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || ((0 <= sn && sn <= 0) && i == 1)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.9s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 202 SDtfs, 134 SDslu, 975 SDs, 0 SdLazy, 503 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=10, 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, 11 MinimizatonAttempts, 22 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 125 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 346 ConstructedInterpolants, 0 QuantifiedInterpolants, 41998 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 160/645 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...