/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:19:30,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:19:30,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:19:31,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:19:31,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:19:31,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:19:31,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:19:31,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:19:31,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:19:31,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:19:31,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:19:31,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:19:31,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:19:31,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:19:31,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:19:31,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:19:31,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:19:31,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:19:31,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:19:31,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:19:31,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:19:31,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:19:31,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:19:31,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:19:31,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:19:31,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:19:31,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:19:31,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:19:31,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:19:31,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:19:31,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:19:31,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:19:31,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:19:31,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:19:31,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:19:31,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:19:31,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:19:31,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:19:31,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:19:31,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:19:31,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:19:31,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:19:31,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:19:31,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:19:31,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:19:31,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:19:31,095 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:19:31,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:19:31,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:19:31,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:19:31,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:19:31,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:19:31,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:19:31,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:19:31,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:19:31,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:19:31,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:19:31,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:19:31,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:19:31,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:19:31,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:19:31,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:19:31,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:19:31,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:19:31,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:19:31,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:19:31,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:19:31,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:19:31,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:19:31,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:19:31,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:19:31,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:19:31,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:19:31,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:19:31,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:19:31,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:19:31,599 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:19:31,600 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-09-21 11:19:31,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b4f4e77f/963bcfa83d0a479b88f76c3f1289841b/FLAG1b07c28ea [2020-09-21 11:19:32,258 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:19:32,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-09-21 11:19:32,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b4f4e77f/963bcfa83d0a479b88f76c3f1289841b/FLAG1b07c28ea [2020-09-21 11:19:32,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b4f4e77f/963bcfa83d0a479b88f76c3f1289841b [2020-09-21 11:19:32,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:19:32,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:19:32,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:32,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:19:32,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:19:32,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:32" (1/1) ... [2020-09-21 11:19:32,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:32, skipping insertion in model container [2020-09-21 11:19:32,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:32" (1/1) ... [2020-09-21 11:19:32,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:19:32,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:19:32,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:32,971 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:19:32,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:33,012 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:19:33,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33 WrapperNode [2020-09-21 11:19:33,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:33,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:19:33,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:19:33,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:19:33,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... [2020-09-21 11:19:33,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:19:33,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:19:33,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:19:33,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:19:33,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:19:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:19:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:19:33,272 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-21 11:19:33,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:19:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:19:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:19:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-21 11:19:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:19:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:19:33,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:19:33,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:19:33,486 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:19:33,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:33 BoogieIcfgContainer [2020-09-21 11:19:33,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:19:33,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:19:33,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:19:33,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:19:33,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:19:32" (1/3) ... [2020-09-21 11:19:33,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21685c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:33, skipping insertion in model container [2020-09-21 11:19:33,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:33" (2/3) ... [2020-09-21 11:19:33,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21685c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:33, skipping insertion in model container [2020-09-21 11:19:33,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:33" (3/3) ... [2020-09-21 11:19:33,501 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-09-21 11:19:33,513 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:19:33,523 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:19:33,546 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:19:33,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:19:33,576 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:19:33,577 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:19:33,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:19:33,577 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:19:33,577 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:19:33,577 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:19:33,578 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:19:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-21 11:19:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:19:33,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:33,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:33,609 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-09-21 11:19:33,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:33,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242970353] [2020-09-21 11:19:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:33,791 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:33,791 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:33,791 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:33,791 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:33,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:19:33,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:19:33,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:33,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:33,883 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:33,883 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:33,884 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:33,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:33,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:33,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:33,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:33,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:33,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:33,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:33,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:33,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:33,905 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:33,905 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:33,905 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:33,906 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:33,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:33,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:19:33,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:33,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:33,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242970353] [2020-09-21 11:19:33,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:33,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:19:33,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756705684] [2020-09-21 11:19:33,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:19:33,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:19:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:19:33,973 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-09-21 11:19:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:34,129 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-09-21 11:19:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:19:34,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:19:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:34,145 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:19:34,145 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:19:34,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:19:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:19:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:19:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-21 11:19:34,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-09-21 11:19:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:34,204 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-21 11:19:34,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:19:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-21 11:19:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:19:34,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:34,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:34,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:19:34,208 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-09-21 11:19:34,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:34,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204580349] [2020-09-21 11:19:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,233 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,233 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,233 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:19:34,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:19:34,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:34,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:19:34,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,263 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,264 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,264 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:34,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:34,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,294 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:19:34,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,295 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,295 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:34,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:19:34,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:34,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:19:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:34,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204580349] [2020-09-21 11:19:34,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:34,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:19:34,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576150110] [2020-09-21 11:19:34,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:19:34,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:19:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:19:34,376 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-09-21 11:19:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:34,479 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-09-21 11:19:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:19:34,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 11:19:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:34,482 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:19:34,482 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:19:34,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:19:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-09-21 11:19:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:19:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-09-21 11:19:34,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-09-21 11:19:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:34,492 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-09-21 11:19:34,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:19:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-09-21 11:19:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:19:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:34,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:34,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:19:34,494 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:34,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-09-21 11:19:34,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:34,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202241414] [2020-09-21 11:19:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,528 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,528 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,528 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,529 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:19:34,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:19:34,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:34,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:34,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,549 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,549 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,550 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:34,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:34,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,577 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:19:34,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:19:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:19:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:19:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,638 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,639 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,639 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,639 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:19:34,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:19:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:34,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 11:19:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,668 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,669 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,669 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,669 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:34,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:34,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:19:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 11:19:34,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202241414] [2020-09-21 11:19:34,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:19:34,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:19:34,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492298677] [2020-09-21 11:19:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:19:34,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:19:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:34,684 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-09-21 11:19:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:34,798 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-09-21 11:19:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:34,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 11:19:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:34,801 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:19:34,801 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:19:34,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:19:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-21 11:19:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:19:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-21 11:19:34,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-09-21 11:19:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:34,810 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-21 11:19:34,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:19:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-21 11:19:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:19:34,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:34,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:34,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:19:34,813 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-09-21 11:19:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:34,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21716734] [2020-09-21 11:19:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,845 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,846 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,846 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:19:34,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:19:34,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:19:34,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:34,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:19:34,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:34,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,873 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,873 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:34,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:34,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,900 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,900 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,901 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,901 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:19:34,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:19:34,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:19:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 11:19:34,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:34,956 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:34,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:34,957 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:34,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:34,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:34,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:19:34,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:19:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:19:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,002 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,005 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,005 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:35,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:19:35,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:35,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 11:19:35,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21716734] [2020-09-21 11:19:35,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:19:35,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:19:35,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259251779] [2020-09-21 11:19:35,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:19:35,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:19:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:19:35,030 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-09-21 11:19:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:35,194 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-09-21 11:19:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:35,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-21 11:19:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:35,196 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:19:35,197 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:19:35,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:19:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:19:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 11:19:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:19:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-09-21 11:19:35,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2020-09-21 11:19:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:35,208 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-09-21 11:19:35,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:19:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-09-21 11:19:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 11:19:35,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:35,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:35,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:19:35,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:35,211 INFO L82 PathProgramCache]: Analyzing trace with hash -801998671, now seen corresponding path program 2 times [2020-09-21 11:19:35,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:35,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008018515] [2020-09-21 11:19:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,289 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:19:35,289 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 11:19:35,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:19:35,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:19:35,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 11:19:35,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:19:35,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,336 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,336 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:35,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:35,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:19:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,410 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:19:35,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:19:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:19:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:19:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:19:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,463 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:19:35,464 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,464 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,464 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:19:35,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:19:35,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:19:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 11:19:35,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,520 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:19:35,520 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,520 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,521 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:35,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:19:35,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:19:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:35,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:19:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,549 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,550 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,550 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:35,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:35,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:35,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:35,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:19:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,569 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:19:35,569 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,569 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,569 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:19:35,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:19:35,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:19:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:19:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:19:35,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,592 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,593 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,593 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,593 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:35,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:35,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:19:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,602 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,603 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,603 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:35,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:35,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-21 11:19:35,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008018515] [2020-09-21 11:19:35,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:19:35,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:19:35,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868079052] [2020-09-21 11:19:35,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:19:35,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:19:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:19:35,622 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2020-09-21 11:19:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:35,864 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2020-09-21 11:19:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:19:35,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-09-21 11:19:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:35,867 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:19:35,868 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:19:35,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:19:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:19:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-21 11:19:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:19:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-09-21 11:19:35,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 54 [2020-09-21 11:19:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:35,883 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-09-21 11:19:35,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:19:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-09-21 11:19:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-21 11:19:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:35,888 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:35,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:19:35,889 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash 159701732, now seen corresponding path program 3 times [2020-09-21 11:19:35,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:35,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407788211] [2020-09-21 11:19:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:35,960 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:35,960 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:35,961 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:35,961 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:35,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-21 11:19:35,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:35,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:19:35,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:19:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-21 11:19:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:36,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,023 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,023 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,024 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,048 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:19:36,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:19:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,108 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,108 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,109 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,109 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-21 11:19:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:19:36,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-21 11:19:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,193 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,194 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,194 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,194 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:19:36,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:19:36,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:19:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-21 11:19:36,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,255 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,256 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,256 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:19:36,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:19:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:19:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 11:19:36,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:19:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,295 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,295 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,296 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,296 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:36,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:19:36,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:19:36,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:36,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:19:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,321 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,321 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:36,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:19:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:19:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,330 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,331 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,331 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,331 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:36,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:36,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:19:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,349 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,350 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,350 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,350 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:19:36,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:36,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:19:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-21 11:19:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,366 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,367 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,367 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,367 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:19:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,380 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,380 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,380 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,381 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:19:36,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 11:19:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,389 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,389 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,390 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,390 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:36,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:19:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,397 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,397 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,397 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,398 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:19:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,404 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,405 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,405 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,405 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:36,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:19:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:36,416 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:36,416 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:36,416 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:36,417 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:36,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:19:36,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:36,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 27 proven. 170 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-21 11:19:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407788211] [2020-09-21 11:19:36,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:19:36,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:19:36,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420935] [2020-09-21 11:19:36,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:19:36,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:19:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:36,440 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 9 states. [2020-09-21 11:19:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:36,639 INFO L93 Difference]: Finished difference Result 90 states and 133 transitions. [2020-09-21 11:19:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:19:36,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-09-21 11:19:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:36,644 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:19:36,644 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 11:19:36,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:19:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 11:19:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-09-21 11:19:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 11:19:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 111 transitions. [2020-09-21 11:19:36,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 111 transitions. Word has length 95 [2020-09-21 11:19:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:36,672 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 111 transitions. [2020-09-21 11:19:36,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:19:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 111 transitions. [2020-09-21 11:19:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 11:19:36,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:36,680 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:19:36,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:19:36,680 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 4 times [2020-09-21 11:19:36,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:36,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553932254] [2020-09-21 11:19:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:19:36,714 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:19:36,715 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:19:36,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:19:36,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:19:36 BoogieIcfgContainer [2020-09-21 11:19:36,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:19:36,764 INFO L168 Benchmark]: Toolchain (without parser) took 4114.40 ms. Allocated memory was 138.9 MB in the beginning and 246.4 MB in the end (delta: 107.5 MB). Free memory was 101.9 MB in the beginning and 107.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:36,766 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 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. [2020-09-21 11:19:36,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.28 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:36,773 INFO L168 Benchmark]: Boogie Preprocessor took 146.06 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:36,774 INFO L168 Benchmark]: RCFGBuilder took 330.25 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 169.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:36,775 INFO L168 Benchmark]: TraceAbstraction took 3266.50 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 169.1 MB in the beginning and 107.1 MB in the end (delta: 62.0 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:36,789 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 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 362.28 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.06 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.25 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 169.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3266.50 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 169.1 MB in the beginning and 107.1 MB in the end (delta: 62.0 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR fibonacci(n-1) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND TRUE n < 1 [L18] return 0; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) [L22] CALL, EXPR fibonacci(n-2) [L17] COND FALSE !(n < 1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 15, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 109 SDslu, 249 SDs, 0 SdLazy, 323 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 338 NumberOfCodeBlocks, 338 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 26420 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 332/548 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...