/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:22:34,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:22:34,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:22:34,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:22:34,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:22:34,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:22:34,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:22:34,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:22:34,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:22:34,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:22:34,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:22:34,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:22:34,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:22:34,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:22:34,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:22:34,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:22:34,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:22:34,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:22:34,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:22:34,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:22:34,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:22:34,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:22:34,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:22:34,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:22:34,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:22:34,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:22:34,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:22:34,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:22:34,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:22:34,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:22:34,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:22:34,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:22:34,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:22:34,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:22:34,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:22:34,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:22:34,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:22:34,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:22:34,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:22:34,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:22:34,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:22:34,447 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 [2020-09-21 12:22:34,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:22:34,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:22:34,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:22:34,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:22:34,510 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:22:34,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:22:34,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:22:34,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:22:34,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:22:34,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:22:34,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:22:34,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:22:34,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:22:34,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:22:34,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:22:34,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:22:34,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:22:34,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:22:34,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:22:34,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:22:34,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:22:34,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:22:34,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:22:34,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:22:34,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:22:34,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:22:34,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:22:34,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:22:34,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:22:34,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:22:34,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:22:35,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:22:35,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:22:35,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:22:35,020 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:22:35,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-21 12:22:35,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3ea9a85/9bbc688ec9b04fa087af090ae3889f19/FLAG156eab589 [2020-09-21 12:22:35,618 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:22:35,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-21 12:22:35,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3ea9a85/9bbc688ec9b04fa087af090ae3889f19/FLAG156eab589 [2020-09-21 12:22:35,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3ea9a85/9bbc688ec9b04fa087af090ae3889f19 [2020-09-21 12:22:35,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:22:35,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:22:35,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:22:35,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:22:35,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:22:35,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:22:35" (1/1) ... [2020-09-21 12:22:35,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5335cf9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:35, skipping insertion in model container [2020-09-21 12:22:35,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:22:35" (1/1) ... [2020-09-21 12:22:36,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:22:36,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:22:36,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:22:36,266 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:22:36,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:22:36,300 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:22:36,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36 WrapperNode [2020-09-21 12:22:36,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:22:36,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:22:36,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:22:36,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:22:36,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... [2020-09-21 12:22:36,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:22:36,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:22:36,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:22:36,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:22:36,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:22:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:22:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:22:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-21 12:22:36,488 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-21 12:22:36,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:22:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:22:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:22:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-21 12:22:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-21 12:22:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:22:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:22:36,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:22:36,732 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:22:36,732 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:22:36,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:22:36 BoogieIcfgContainer [2020-09-21 12:22:36,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:22:36,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:22:36,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:22:36,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:22:36,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:22:35" (1/3) ... [2020-09-21 12:22:36,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d63b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:22:36, skipping insertion in model container [2020-09-21 12:22:36,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:22:36" (2/3) ... [2020-09-21 12:22:36,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d63b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:22:36, skipping insertion in model container [2020-09-21 12:22:36,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:22:36" (3/3) ... [2020-09-21 12:22:36,753 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-09-21 12:22:36,766 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:22:36,778 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:22:36,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:22:36,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:22:36,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:22:36,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:22:36,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:22:36,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:22:36,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:22:36,890 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:22:36,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:22:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 12:22:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 12:22:36,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:36,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:36,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-21 12:22:36,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:36,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699473149] [2020-09-21 12:22:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:22:37,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 12:22:37,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:22:37,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:37,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:22:37,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:37,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:37,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:22:37,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:37,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:37,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:22:37,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:37,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:22:37,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:37,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:22:37,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699473149] [2020-09-21 12:22:37,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:22:37,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:22:37,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713603103] [2020-09-21 12:22:37,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:22:37,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:22:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:22:37,295 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-21 12:22:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:37,422 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-21 12:22:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:22:37,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 12:22:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:37,437 INFO L225 Difference]: With dead ends: 44 [2020-09-21 12:22:37,438 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 12:22:37,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:22:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 12:22:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 12:22:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 12:22:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-21 12:22:37,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-21 12:22:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:37,503 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-21 12:22:37,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:22:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-21 12:22:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:22:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:37,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:37,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:22:37,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-21 12:22:37,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:37,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835969258] [2020-09-21 12:22:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:22:37,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:22:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-21 12:22:37,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:22:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:22:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:22:37,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:37,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:22:37,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:37,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:37,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:37,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:37,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:22:37,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:37,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 12:22:37,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:22:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:37,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:22:37,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835969258] [2020-09-21 12:22:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:22:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:22:37,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101372903] [2020-09-21 12:22:37,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:22:37,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:22:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:22:37,903 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-21 12:22:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:37,927 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-21 12:22:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:22:37,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 12:22:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:37,929 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:22:37,929 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 12:22:37,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:22:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 12:22:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 12:22:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 12:22:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-21 12:22:37,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-21 12:22:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:37,949 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-21 12:22:37,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:22:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-21 12:22:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:22:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:37,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:37,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:22:37,953 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-21 12:22:37,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:37,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48732914] [2020-09-21 12:22:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:37,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:22:38,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:22:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-21 12:22:38,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:22:38,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:38,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:38,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:38,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:22:38,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:38,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:38,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:38,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:22:38,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:22:38,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:22:38,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:38,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:38,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:22:38,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:22:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:38,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-09-21 12:22:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:22:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:22:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:22:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:22:38,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48732914] [2020-09-21 12:22:38,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:22:38,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:22:38,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103183160] [2020-09-21 12:22:38,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:22:38,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:38,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:22:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:22:38,376 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 6 states. [2020-09-21 12:22:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:38,468 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-21 12:22:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:22:38,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 12:22:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:38,471 INFO L225 Difference]: With dead ends: 58 [2020-09-21 12:22:38,472 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:22:38,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:22:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:22:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-21 12:22:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:22:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-21 12:22:38,483 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-21 12:22:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:38,484 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-21 12:22:38,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:22:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-21 12:22:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:22:38,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:38,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:38,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:22:38,486 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-21 12:22:38,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:38,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154180272] [2020-09-21 12:22:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:22:38,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-21 12:22:38,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:22:38,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:22:38,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:22:38,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:38,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:38,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:22:38,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:38,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:38,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:22:38,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 12:22:38,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:22:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:22:38,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:38,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:22:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 12:22:38,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:22:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:38,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:22:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:38,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:38,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:38,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:38,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 12:22:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:38,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:22:38,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154180272] [2020-09-21 12:22:38,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:22:38,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:22:38,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115783238] [2020-09-21 12:22:38,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:22:38,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:22:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:22:38,908 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-09-21 12:22:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:38,980 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-09-21 12:22:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:22:38,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-21 12:22:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:38,983 INFO L225 Difference]: With dead ends: 46 [2020-09-21 12:22:38,983 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:22:38,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:22:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:22:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-09-21 12:22:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:22:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-21 12:22:38,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-09-21 12:22:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:38,995 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-21 12:22:38,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:22:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-21 12:22:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:22:38,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:38,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:38,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:22:38,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-09-21 12:22:38,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:38,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649600308] [2020-09-21 12:22:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:39,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 12:22:39,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:22:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-09-21 12:22:39,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:22:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:22:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:22:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:39,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:39,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:39,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:22:39,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:39,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:39,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:39,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:22:39,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:22:39,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-09-21 12:22:39,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:22:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:22:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:22:39,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:40,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:40,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:22:40,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:22:40,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 12:22:40,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:22:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:40,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:40,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:22:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:40,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:40,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:22:40,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:22:40,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:22:40,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:22:40,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:22:40,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649600308] [2020-09-21 12:22:40,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:22:40,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:22:40,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719992863] [2020-09-21 12:22:40,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:22:40,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:22:40,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:22:40,134 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-09-21 12:22:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:40,249 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-09-21 12:22:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:22:40,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 12:22:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:40,251 INFO L225 Difference]: With dead ends: 46 [2020-09-21 12:22:40,251 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:22:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:22:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:22:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-09-21 12:22:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:22:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-21 12:22:40,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2020-09-21 12:22:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:40,262 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-21 12:22:40,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:22:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-21 12:22:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:22:40,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:40,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:40,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:22:40,264 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-21 12:22:40,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:40,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636303612] [2020-09-21 12:22:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:40,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:41,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 12:22:41,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:22:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:22:41,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:22:41,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:41,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:41,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:41,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:41,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:41,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:41,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:22:41,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:41,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:41,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:41,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:41,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:41,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:42,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 12:22:42,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:22:42,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-09-21 12:22:42,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:42,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 12:22:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:22:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:42,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:42,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:22:42,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:42,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-21 12:22:42,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:22:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:42,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:42,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:42,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:22:42,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:22:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:22:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:22:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:42,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:42,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:42,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:22:42,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:22:42,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:42,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 12:22:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:42,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:42,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:42,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:22:42,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:22:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 12:22:42,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636303612] [2020-09-21 12:22:42,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:22:42,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:22:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848876577] [2020-09-21 12:22:42,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:22:42,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:22:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:22:42,368 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 6 states. [2020-09-21 12:22:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:42,473 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2020-09-21 12:22:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:22:42,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-09-21 12:22:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:42,476 INFO L225 Difference]: With dead ends: 70 [2020-09-21 12:22:42,476 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:22:42,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:22:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:22:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 12:22:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:22:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-09-21 12:22:42,492 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2020-09-21 12:22:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:42,494 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-09-21 12:22:42,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:22:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-09-21 12:22:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:22:42,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:22:42,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:22:42,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:22:42,499 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:22:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:22:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-09-21 12:22:42,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:22:42,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926453459] [2020-09-21 12:22:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:22:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:42,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:42,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:22:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:22:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:22:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:22:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:22:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:22:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:43,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:22:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:43,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:43,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:22:43,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:43,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:22:43,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:22:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:43,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:22:43,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:43,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:22:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:44,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:22:44,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:22:44,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:22:44,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:44,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:22:44,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:22:44,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 12:22:44,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:44,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:22:44,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:22:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-09-21 12:22:44,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:22:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 12:22:44,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:22:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:22:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:44,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:22:44,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:22:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:22:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:22:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:22:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:44,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:44,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:44,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:22:44,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:44,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:22:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:44,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:44,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:44,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:22:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:22:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:22:44,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:22:44,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:22:44,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:22:44,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:22:44,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:22:44,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:22:44,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:22:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:22:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:22:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 12:22:44,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926453459] [2020-09-21 12:22:44,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:22:44,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:22:44,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588647217] [2020-09-21 12:22:44,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:22:44,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:22:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:22:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:22:44,987 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 7 states. [2020-09-21 12:22:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:22:45,164 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-09-21 12:22:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:22:45,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-09-21 12:22:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:22:45,166 INFO L225 Difference]: With dead ends: 42 [2020-09-21 12:22:45,166 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:22:45,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:22:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:22:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:22:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:22:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:22:45,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-09-21 12:22:45,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:22:45,168 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:22:45,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:22:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:22:45,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:22:45,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:22:45,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:22:45,497 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:22:45,497 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:22:45,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:22:45,498 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:22:45,498 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:22:45,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:22:45,498 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-21 12:22:45,498 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-21 12:22:45,499 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (= main_~x~0 2) [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-21 12:22:45,499 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-21 12:22:45,500 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-21 12:22:45,500 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-21 12:22:45,501 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-21 12:22:45,501 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-21 12:22:45,501 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-21 12:22:45,501 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-21 12:22:45,501 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-21 12:22:45,502 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-21 12:22:45,502 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-21 12:22:45,502 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-21 12:22:45,502 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= |fibo1_#in~n| fibo1_~n) (< 1 fibo1_~n) (or (<= fibo1_~n |fibo1_#in~n|) (<= fibo1_~n 2))) [2020-09-21 12:22:45,502 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-21 12:22:45,503 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= |fibo1_#in~n| fibo1_~n)) (.cse1 (< 1 fibo1_~n)) (.cse2 (or (<= fibo1_~n |fibo1_#in~n|) (<= fibo1_~n 2)))) (or (and (<= |fibo1_#t~ret0| 1) .cse0 .cse1 (<= 1 |fibo1_#t~ret0|) .cse2) (and (or (<= |fibo1_#in~n| 1) (<= 3 |fibo1_#in~n|)) .cse0 .cse1 .cse2))) [2020-09-21 12:22:45,503 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-21 12:22:45,503 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-21 12:22:45,503 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-21 12:22:45,503 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-21 12:22:45,503 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-21 12:22:45,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:22:45 BoogieIcfgContainer [2020-09-21 12:22:45,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:22:45,518 INFO L168 Benchmark]: Toolchain (without parser) took 9537.54 ms. Allocated memory was 139.5 MB in the beginning and 288.4 MB in the end (delta: 148.9 MB). Free memory was 103.0 MB in the beginning and 149.3 MB in the end (delta: -46.4 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,525 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.45 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,528 INFO L168 Benchmark]: Boogie Preprocessor took 105.79 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 92.7 MB in the beginning and 179.6 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,528 INFO L168 Benchmark]: RCFGBuilder took 332.53 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 165.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,529 INFO L168 Benchmark]: TraceAbstraction took 8772.60 ms. Allocated memory was 200.8 MB in the beginning and 288.4 MB in the end (delta: 87.6 MB). Free memory was 165.6 MB in the beginning and 149.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 103.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:22:45,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.45 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.79 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 92.7 MB in the beginning and 179.6 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.53 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 165.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8772.60 ms. Allocated memory was 200.8 MB in the beginning and 288.4 MB in the end (delta: 87.6 MB). Free memory was 165.6 MB in the beginning and 149.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 103.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.2s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 77 SDslu, 717 SDs, 0 SdLazy, 303 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 50 PreInvPairs, 60 NumberOfFragments, 79 HoareAnnotationTreeSize, 50 FomulaSimplifications, 90 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 126 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 14507 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 30/46 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...