/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=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_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:19:42,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:19:42,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:19:42,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:19:42,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:19:42,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:19:42,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:19:42,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:19:42,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:19:42,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:19:42,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:19:42,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:19:42,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:19:42,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:19:42,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:19:42,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:19:42,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:19:42,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:19:42,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:19:42,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:19:42,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:19:42,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:19:42,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:19:42,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:19:42,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:19:42,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:19:42,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:19:42,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:19:42,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:19:42,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:19:42,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:19:42,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:19:42,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:19:42,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:19:42,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:19:42,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:19:42,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:19:42,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:19:42,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:19:42,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:19:42,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:19:42,935 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 [2020-09-24 19:19:42,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:19:42,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:19:42,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:19:42,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:19:42,962 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:19:42,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:19:42,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:19:42,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:19:42,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:19:42,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:19:42,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:19:42,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:19:42,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:19:42,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:19:42,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:19:42,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:19:42,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:19:42,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:19:42,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:19:42,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:19:42,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:19:42,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:19:42,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:19:42,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:19:42,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:19:42,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:19:42,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:19:42,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:19:42,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:19:42,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=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; [2020-09-24 19:19:43,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:19:43,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:19:43,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:19:43,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:19:43,459 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:19:43,460 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-09-24 19:19:43,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34749f52/860e07e2fd374a3fa218ea263c5633e1/FLAGfa110cd14 [2020-09-24 19:19:44,099 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:19:44,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-09-24 19:19:44,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34749f52/860e07e2fd374a3fa218ea263c5633e1/FLAGfa110cd14 [2020-09-24 19:19:44,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34749f52/860e07e2fd374a3fa218ea263c5633e1 [2020-09-24 19:19:44,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:19:44,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:19:44,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:19:44,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:19:44,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:19:44,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1982a2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44, skipping insertion in model container [2020-09-24 19:19:44,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:19:44,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:19:44,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:19:44,760 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:19:44,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:19:44,795 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:19:44,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44 WrapperNode [2020-09-24 19:19:44,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:19:44,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:19:44,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:19:44,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:19:44,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... [2020-09-24 19:19:44,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:19:44,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:19:44,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:19:44,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:19:44,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:19:44,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:19:44,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:19:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-24 19:19:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-24 19:19:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:19:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:19:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:19:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-24 19:19:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-24 19:19:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:19:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:19:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:19:45,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:19:45,218 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:19:45,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:19:45 BoogieIcfgContainer [2020-09-24 19:19:45,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:19:45,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:19:45,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:19:45,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:19:45,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:19:44" (1/3) ... [2020-09-24 19:19:45,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd2778f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:19:45, skipping insertion in model container [2020-09-24 19:19:45,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:19:44" (2/3) ... [2020-09-24 19:19:45,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd2778f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:19:45, skipping insertion in model container [2020-09-24 19:19:45,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:19:45" (3/3) ... [2020-09-24 19:19:45,234 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-09-24 19:19:45,252 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:19:45,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:19:45,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:19:45,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:19:45,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:19:45,333 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:19:45,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:19:45,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:19:45,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:19:45,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:19:45,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:19:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-24 19:19:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:19:45,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:45,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:45,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-24 19:19:45,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:45,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759485149] [2020-09-24 19:19:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:45,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:45,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:19:45,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:19:45,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-09-24 19:19:45,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:19:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 19:19:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:45,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:19:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:45,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:45,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:45,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:45,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:45,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:19:45,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:45,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:45,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:45,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:19:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:45,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:45,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:45,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:45,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:19:45,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:19:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:19:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:19:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:19:45,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759485149] [2020-09-24 19:19:45,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:19:45,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:19:45,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474476097] [2020-09-24 19:19:45,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:19:45,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:19:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:19:45,965 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-24 19:19:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:46,058 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-24 19:19:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:19:46,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 19:19:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:46,076 INFO L225 Difference]: With dead ends: 58 [2020-09-24 19:19:46,077 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 19:19:46,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:19:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 19:19:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-24 19:19:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 19:19:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 19:19:46,149 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-24 19:19:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:46,150 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 19:19:46,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:19:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 19:19:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 19:19:46,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:46,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:46,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:19:46,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-24 19:19:46,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:46,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19192874] [2020-09-24 19:19:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:46,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:19:46,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:19:46,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-24 19:19:46,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:19:46,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:19:46,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:46,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:19:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:46,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:46,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:46,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:19:46,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:46,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:46,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:46,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:46,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 19:19:46,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:19:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:46,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:19:46,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19192874] [2020-09-24 19:19:46,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:19:46,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:19:46,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340644380] [2020-09-24 19:19:46,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:19:46,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:19:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:19:46,487 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-24 19:19:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:46,528 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 19:19:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:19:46,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 19:19:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:46,531 INFO L225 Difference]: With dead ends: 50 [2020-09-24 19:19:46,531 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 19:19:46,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:19:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 19:19:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 19:19:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 19:19:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 19:19:46,543 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-24 19:19:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:46,544 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 19:19:46,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:19:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 19:19:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 19:19:46,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:46,546 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, 1, 1, 1, 1, 1] [2020-09-24 19:19:46,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:19:46,547 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-24 19:19:46,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:46,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369717368] [2020-09-24 19:19:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:46,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:47,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 19:19:47,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:19:47,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:19:47,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:47,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:19:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:47,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:47,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:47,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:47,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:47,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:47,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:19:47,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:47,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:47,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 19:19:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 19:19:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:19:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:47,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:47,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:47,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:19:47,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:19:47,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:47,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:47,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:47,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 19:19:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:47,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:47,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:47,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:19:47,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 19:19:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:47,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:19:47,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369717368] [2020-09-24 19:19:47,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:47,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:19:47,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76381954] [2020-09-24 19:19:47,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:19:47,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:19:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:19:47,720 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2020-09-24 19:19:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:47,803 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-09-24 19:19:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:19:47,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 19:19:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:47,805 INFO L225 Difference]: With dead ends: 82 [2020-09-24 19:19:47,805 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 19:19:47,807 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 [2020-09-24 19:19:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 19:19:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 19:19:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 19:19:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 19:19:47,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-09-24 19:19:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:47,818 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 19:19:47,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:19:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 19:19:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 19:19:47,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:47,820 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:47,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:19:47,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-24 19:19:47,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:47,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059268239] [2020-09-24 19:19:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:47,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:48,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:48,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 19:19:48,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:19:48,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:19:48,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:48,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:48,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:19:48,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:19:48,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:48,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:48,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:48,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:48,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:19:48,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:48,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:48,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:49,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:19:49,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:19:49,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-09-24 19:19:49,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:19:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:49,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:49,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:49,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:49,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:19:49,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:19:49,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:19:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:49,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:49,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:49,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:19:49,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:49,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:19:49,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059268239] [2020-09-24 19:19:49,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:49,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:19:49,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48918382] [2020-09-24 19:19:49,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:19:49,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:19:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:19:49,246 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-09-24 19:19:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:49,410 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-09-24 19:19:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:19:49,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 19:19:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:49,414 INFO L225 Difference]: With dead ends: 70 [2020-09-24 19:19:49,414 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 19:19:49,415 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 [2020-09-24 19:19:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 19:19:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-09-24 19:19:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 19:19:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-09-24 19:19:49,435 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 34 [2020-09-24 19:19:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:49,436 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-09-24 19:19:49,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:19:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-09-24 19:19:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 19:19:49,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:49,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:49,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:19:49,439 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-09-24 19:19:49,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:49,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972715244] [2020-09-24 19:19:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:49,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:50,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:50,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:19:50,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:19:50,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:19:50,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 19:19:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:50,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:50,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:50,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:50,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:50,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:50,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:19:50,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:50,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:50,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:50,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:50,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:51,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 19:19:51,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:19:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-09-24 19:19:51,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 19:19:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:51,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:51,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 19:19:51,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:51,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 19:19:51,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 19:19:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:51,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:51,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:51,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:51,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:51,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:51,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:19:51,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:19:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:51,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 19:19:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:51,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:51,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:51,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:51,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:19:51,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:51,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 19:19:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:51,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 19:19:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:51,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:51,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:51,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:51,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:19:51,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 19:19:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 19:19:51,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972715244] [2020-09-24 19:19:51,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:51,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:19:51,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501627645] [2020-09-24 19:19:51,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:19:51,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:51,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:19:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:19:51,408 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 6 states. [2020-09-24 19:19:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:51,493 INFO L93 Difference]: Finished difference Result 122 states and 168 transitions. [2020-09-24 19:19:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:19:51,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-09-24 19:19:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:51,496 INFO L225 Difference]: With dead ends: 122 [2020-09-24 19:19:51,496 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 19:19:51,498 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 [2020-09-24 19:19:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 19:19:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-24 19:19:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 19:19:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-09-24 19:19:51,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 50 [2020-09-24 19:19:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:51,510 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-09-24 19:19:51,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:19:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-09-24 19:19:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 19:19:51,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:51,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:51,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:19:51,514 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:51,514 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-09-24 19:19:51,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:51,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263500694] [2020-09-24 19:19:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:51,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:52,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 19:19:52,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:19:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:19:52,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:19:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 19:19:52,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:19:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:52,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:52,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:52,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:19:52,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:52,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:52,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:19:52,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:52,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:53,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:19:53,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:19:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:19:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 19:19:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:53,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:53,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:53,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:19:53,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:53,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:19:53,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:19:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:53,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:53,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:53,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:53,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:19:53,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:53,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:19:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:53,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:53,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:53,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:19:53,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:53,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:53,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:53,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 19:19:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:53,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:53,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:53,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:19:53,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:53,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:19:53,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 19:19:53,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263500694] [2020-09-24 19:19:53,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:53,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:19:53,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529170819] [2020-09-24 19:19:53,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:19:53,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:19:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:19:53,722 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 7 states. [2020-09-24 19:19:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:53,846 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-09-24 19:19:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:19:53,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-09-24 19:19:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:53,849 INFO L225 Difference]: With dead ends: 84 [2020-09-24 19:19:53,849 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 19:19:53,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:19:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 19:19:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-09-24 19:19:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 19:19:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-09-24 19:19:53,876 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 51 [2020-09-24 19:19:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:53,877 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-09-24 19:19:53,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:19:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-09-24 19:19:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 19:19:53,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:53,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:53,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:19:53,882 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:53,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:53,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-09-24 19:19:53,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:53,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109516880] [2020-09-24 19:19:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:53,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:53,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:54,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:54,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:54,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 19:19:54,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:19:54,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:19:54,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:54,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:19:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 19:19:54,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:54,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:54,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:54,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:54,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:54,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:19:54,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:54,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:54,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:54,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:55,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:55,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 19:19:55,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:19:55,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:19:55,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:55,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:55,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:55,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 19:19:55,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:55,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:55,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:55,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:19:55,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:55,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 19:19:55,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:19:55,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:55,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:56,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:56,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:56,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:19:56,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:56,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:56,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:19:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:56,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:56,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:56,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:56,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:19:56,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:56,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:56,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 19:19:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:56,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:56,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:56,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:19:56,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:56,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:19:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 19:19:56,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109516880] [2020-09-24 19:19:56,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:56,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:19:56,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622054723] [2020-09-24 19:19:56,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:19:56,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:19:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:19:56,064 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 7 states. [2020-09-24 19:19:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:56,191 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-09-24 19:19:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:19:56,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 19:19:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:56,193 INFO L225 Difference]: With dead ends: 78 [2020-09-24 19:19:56,196 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 19:19:56,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:19:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 19:19:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-09-24 19:19:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 19:19:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-09-24 19:19:56,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 52 [2020-09-24 19:19:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:56,218 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-09-24 19:19:56,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:19:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-09-24 19:19:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 19:19:56,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:56,221 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 19:19:56,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:19:56,221 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -387134248, now seen corresponding path program 1 times [2020-09-24 19:19:56,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:56,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172601278] [2020-09-24 19:19:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:56,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:57,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 19:19:57,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:19:57,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-09-24 19:19:57,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:57,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:19:57,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:19:57,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 19:19:57,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:57,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:19:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:57,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:19:57,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:57,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:19:57,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:19:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:19:57,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:57,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:19:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:58,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:58,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 19:19:58,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:19:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-24 19:19:58,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:19:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 19:19:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 19:19:58,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:58,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:58,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:58,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:58,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:19:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:19:58,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-09-24 19:19:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:19:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:19:58,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:58,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:58,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:58,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:58,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:58,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:19:58,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:58,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:19:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:19:58,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:58,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:19:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:59,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:59,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:59,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:19:59,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:59,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:59,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 19:19:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:59,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:19:59,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:19:59,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-24 19:19:59,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:19:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:19:59,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:19:59,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:19:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:19:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:19:59,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:19:59,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:59,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:19:59,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:59,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:19:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:19:59,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:19:59,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:19:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:19:59,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:19:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:19:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:19:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:19:59,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:19:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-24 19:19:59,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172601278] [2020-09-24 19:19:59,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:19:59,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:19:59,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299991510] [2020-09-24 19:19:59,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:19:59,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:19:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:19:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:19:59,335 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 9 states. [2020-09-24 19:19:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:19:59,725 INFO L93 Difference]: Finished difference Result 152 states and 223 transitions. [2020-09-24 19:19:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:19:59,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-09-24 19:19:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:19:59,730 INFO L225 Difference]: With dead ends: 152 [2020-09-24 19:19:59,730 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 19:19:59,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:19:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 19:19:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-09-24 19:19:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 19:19:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2020-09-24 19:19:59,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 69 [2020-09-24 19:19:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:19:59,755 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2020-09-24 19:19:59,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:19:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2020-09-24 19:19:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 19:19:59,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:19:59,760 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:19:59,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:19:59,761 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:19:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:19:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -271039366, now seen corresponding path program 1 times [2020-09-24 19:19:59,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:19:59,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577382611] [2020-09-24 19:19:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:19:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:19:59,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:19:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:00,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-09-24 19:20:00,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 19:20:00,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:20:00,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:00,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:20:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 19:20:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:20:00,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:00,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:20:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:00,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:00,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:20:00,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:00,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:20:00,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:20:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:20:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 19:20:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:00,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:01,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 19:20:01,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 19:20:01,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-24 19:20:01,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:20:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:20:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:20:01,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:20:01,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:01,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:02,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:02,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:02,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:20:02,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:20:02,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-09-24 19:20:02,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:02,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:20:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 19:20:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 19:20:02,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:02,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:03,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:20:03,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:20:03,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-09-24 19:20:03,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:20:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:20:03,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:03,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:03,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:20:03,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:03,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:20:03,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:20:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:20:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:03,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:20:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:03,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:20:03,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:03,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:20:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:20:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:20:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:03,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 19:20:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:03,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:20:03,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:03,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:20:03,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:20:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:20:03,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:20:03,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 19:20:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:04,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 19:20:04,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:20:04,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:20:04,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:04,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:20:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 19:20:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 19:20:04,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:04,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:04,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:04,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 19:20:05,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:20:05,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:20:05,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:20:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:05,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 19:20:05,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:20:05,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:20:05,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:20:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:20:05,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 19:20:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:20:05,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:20:05,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:20:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:20:05,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 19:20:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:05,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:20:05,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:05,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:20:05,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:20:05,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:05,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:20:05,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 19:20:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:20:05,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:05,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:20:05,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:20:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:20:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 19:20:05,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 19:20:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:20:05,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:20:05,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:20:05,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:20:05,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:20:05,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:20:05,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:20:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:20:05,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 19:20:05,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:20:05,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:20:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 62 proven. 38 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-09-24 19:20:05,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577382611] [2020-09-24 19:20:05,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:20:05,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:20:05,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457207322] [2020-09-24 19:20:05,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:20:05,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:20:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:20:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:20:05,341 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand 8 states. [2020-09-24 19:20:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:20:05,490 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-24 19:20:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:20:05,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-09-24 19:20:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:20:05,494 INFO L225 Difference]: With dead ends: 178 [2020-09-24 19:20:05,494 INFO L226 Difference]: Without dead ends: 98 [2020-09-24 19:20:05,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:20:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-24 19:20:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2020-09-24 19:20:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 19:20:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2020-09-24 19:20:05,513 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 121 [2020-09-24 19:20:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:20:05,513 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2020-09-24 19:20:05,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:20:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2020-09-24 19:20:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 19:20:05,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:20:05,515 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:20:05,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:20:05,516 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:20:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:20:05,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1951493560, now seen corresponding path program 2 times [2020-09-24 19:20:05,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:20:05,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470916164] [2020-09-24 19:20:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:20:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:20:05,530 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:20:05,530 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:20:05,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:20:05,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:20:05 BoogieIcfgContainer [2020-09-24 19:20:05,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:20:05,565 INFO L168 Benchmark]: Toolchain (without parser) took 21087.15 ms. Allocated memory was 138.9 MB in the beginning and 348.1 MB in the end (delta: 209.2 MB). Free memory was 102.4 MB in the beginning and 160.7 MB in the end (delta: -58.3 MB). Peak memory consumption was 150.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,566 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.94 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,567 INFO L168 Benchmark]: Boogie Preprocessor took 107.49 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 180.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,568 INFO L168 Benchmark]: RCFGBuilder took 319.14 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,569 INFO L168 Benchmark]: TraceAbstraction took 20336.51 ms. Allocated memory was 201.3 MB in the beginning and 348.1 MB in the end (delta: 146.8 MB). Free memory was 165.9 MB in the beginning and 160.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 152.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:20:05,572 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.94 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.49 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 180.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.14 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20336.51 ms. Allocated memory was 201.3 MB in the beginning and 348.1 MB in the end (delta: 146.8 MB). Free memory was 165.9 MB in the beginning and 160.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 152.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 3 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.2s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 372 SDtfs, 256 SDslu, 1203 SDs, 0 SdLazy, 567 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 42 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 530 NumberOfCodeBlocks, 530 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 434 ConstructedInterpolants, 0 QuantifiedInterpolants, 61388 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 245/324 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 incorrect! Received shutdown request...