/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:28:05,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:28:05,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:28:05,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:28:05,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:28:05,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:28:06,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:28:06,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:28:06,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:28:06,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:28:06,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:28:06,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:28:06,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:28:06,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:28:06,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:28:06,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:28:06,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:28:06,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:28:06,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:28:06,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:28:06,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:28:06,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:28:06,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:28:06,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:28:06,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:28:06,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:28:06,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:28:06,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:28:06,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:28:06,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:28:06,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:28:06,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:28:06,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:28:06,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:28:06,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:28:06,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:28:06,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:28:06,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:28:06,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:28:06,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:28:06,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:28:06,037 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 [2020-10-13 05:28:06,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:28:06,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:28:06,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:28:06,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:28:06,062 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:28:06,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:28:06,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:28:06,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:28:06,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:28:06,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:28:06,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:28:06,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:28:06,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:28:06,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:28:06,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:28:06,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:28:06,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:28:06,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:28:06,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:28:06,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:28:06,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:28:06,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:28:06,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:28:06,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:28:06,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:28:06,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:28:06,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:28:06,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:28:06,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:28:06,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:28:06,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:28:06,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:28:06,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:28:06,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:28:06,490 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:28:06,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_3.c [2020-10-13 05:28:06,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e688ddd5c/3098622dcea34558a63420fbf5521109/FLAGa14e49dfe [2020-10-13 05:28:07,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:28:07,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_3.c [2020-10-13 05:28:07,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e688ddd5c/3098622dcea34558a63420fbf5521109/FLAGa14e49dfe [2020-10-13 05:28:07,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e688ddd5c/3098622dcea34558a63420fbf5521109 [2020-10-13 05:28:07,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:28:07,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:28:07,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:28:07,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:28:07,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:28:07,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbac012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07, skipping insertion in model container [2020-10-13 05:28:07,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:28:07,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:28:07,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:28:07,729 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:28:07,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:28:07,784 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:28:07,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07 WrapperNode [2020-10-13 05:28:07,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:28:07,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:28:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:28:07,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:28:07,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (1/1) ... [2020-10-13 05:28:07,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:28:07,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:28:07,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:28:07,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:28:07,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (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 [2020-10-13 05:28:07,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:28:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:28:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:28:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-10-13 05:28:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:28:07,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:28:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:28:08,199 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:28:08,200 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 05:28:08,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:28:08 BoogieIcfgContainer [2020-10-13 05:28:08,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:28:08,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:28:08,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:28:08,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:28:08,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:28:07" (1/3) ... [2020-10-13 05:28:08,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30df3ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:28:08, skipping insertion in model container [2020-10-13 05:28:08,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:07" (2/3) ... [2020-10-13 05:28:08,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30df3ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:28:08, skipping insertion in model container [2020-10-13 05:28:08,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:28:08" (3/3) ... [2020-10-13 05:28:08,215 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2020-10-13 05:28:08,227 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:28:08,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:28:08,254 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:28:08,283 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:28:08,284 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:28:08,284 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:28:08,284 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:28:08,285 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:28:08,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:28:08,285 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:28:08,285 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:28:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 05:28:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:08,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:08,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:08,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 578872383, now seen corresponding path program 1 times [2020-10-13 05:28:08,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:08,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409729329] [2020-10-13 05:28:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:08,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:08,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:08,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:08,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-13 05:28:08,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:28:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:28:08,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:08,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:08,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:08,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:08,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:08,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:08,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:08,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:08,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:09,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:09,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 05:28:09,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 05:28:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:09,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409729329] [2020-10-13 05:28:09,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:09,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 05:28:09,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286225323] [2020-10-13 05:28:09,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 05:28:09,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 05:28:09,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 05:28:09,068 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-10-13 05:28:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:09,105 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-13 05:28:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 05:28:09,107 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-13 05:28:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:09,120 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:28:09,121 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:28:09,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 05:28:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:28:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:28:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:28:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 05:28:09,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2020-10-13 05:28:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:09,168 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 05:28:09,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 05:28:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 05:28:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:09,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:09,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:09,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:28:09,171 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:09,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1364926403, now seen corresponding path program 1 times [2020-10-13 05:28:09,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:09,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988788974] [2020-10-13 05:28:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:09,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:09,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-13 05:28:09,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:09,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:28:09,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:28:09,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 05:28:09,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:09,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:09,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:09,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:09,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:09,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:09,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:09,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:09,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:09,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 05:28:09,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:09,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:28:09,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:28:09,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:09,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988788974] [2020-10-13 05:28:09,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:09,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:28:09,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601215172] [2020-10-13 05:28:09,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:28:09,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:28:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:28:09,922 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-13 05:28:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:10,035 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 05:28:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:28:10,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 05:28:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:10,037 INFO L225 Difference]: With dead ends: 31 [2020-10-13 05:28:10,037 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 05:28:10,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:28:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 05:28:10,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 05:28:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:28:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 05:28:10,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-10-13 05:28:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:10,045 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 05:28:10,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:28:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 05:28:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:10,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:10,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:10,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:28:10,047 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2065990981, now seen corresponding path program 1 times [2020-10-13 05:28:10,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:10,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820382614] [2020-10-13 05:28:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:10,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 05:28:10,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:28:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:28:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:10,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:10,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:10,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:10,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:28:10,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:10,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 05:28:10,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:28:10,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:10,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820382614] [2020-10-13 05:28:10,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:10,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 05:28:10,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959195341] [2020-10-13 05:28:10,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:28:10,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:28:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:28:10,212 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-10-13 05:28:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:10,327 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-13 05:28:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:28:10,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-13 05:28:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:10,330 INFO L225 Difference]: With dead ends: 34 [2020-10-13 05:28:10,330 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:28:10,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:28:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:28:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-13 05:28:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:28:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 05:28:10,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-13 05:28:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:10,338 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 05:28:10,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:28:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 05:28:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:10,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:10,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:10,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:28:10,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1807825543, now seen corresponding path program 1 times [2020-10-13 05:28:10,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:10,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639757926] [2020-10-13 05:28:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:10,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 05:28:10,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:28:10,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:10,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:28:10,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:10,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:10,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:10,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:10,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 05:28:10,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:28:10,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:28:10,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:10,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639757926] [2020-10-13 05:28:10,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:10,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:28:10,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656051817] [2020-10-13 05:28:10,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:28:10,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:28:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:28:10,453 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-10-13 05:28:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:10,487 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-13 05:28:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:28:10,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 05:28:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:10,489 INFO L225 Difference]: With dead ends: 34 [2020-10-13 05:28:10,489 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 05:28:10,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:28:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 05:28:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 05:28:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:28:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 05:28:10,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-13 05:28:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:10,495 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 05:28:10,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:28:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 05:28:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:28:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:10,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:10,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:28:10,497 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash -41516072, now seen corresponding path program 1 times [2020-10-13 05:28:10,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:10,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269666573] [2020-10-13 05:28:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:10,506 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-13 05:28:10,507 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-13 05:28:10,507 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 05:28:10,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:28:10,528 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-13 05:28:10,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:28:10 BoogieIcfgContainer [2020-10-13 05:28:10,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 05:28:10,532 INFO L168 Benchmark]: Toolchain (without parser) took 3108.60 ms. Allocated memory was 151.0 MB in the beginning and 230.2 MB in the end (delta: 79.2 MB). Free memory was 107.5 MB in the beginning and 103.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:10,533 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 05:28:10,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.01 ms. Allocated memory is still 151.0 MB. Free memory was 107.3 MB in the beginning and 97.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:10,535 INFO L168 Benchmark]: Boogie Preprocessor took 123.27 ms. Allocated memory was 151.0 MB in the beginning and 205.0 MB in the end (delta: 54.0 MB). Free memory was 97.2 MB in the beginning and 183.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:10,535 INFO L168 Benchmark]: RCFGBuilder took 293.42 ms. Allocated memory is still 205.0 MB. Free memory was 183.5 MB in the beginning and 170.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:10,536 INFO L168 Benchmark]: TraceAbstraction took 2323.22 ms. Allocated memory was 205.0 MB in the beginning and 230.2 MB in the end (delta: 25.2 MB). Free memory was 169.9 MB in the beginning and 103.5 MB in the end (delta: 66.4 MB). Peak memory consumption was 91.6 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:10,540 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.01 ms. Allocated memory is still 151.0 MB. Free memory was 107.3 MB in the beginning and 97.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.27 ms. Allocated memory was 151.0 MB in the beginning and 205.0 MB in the end (delta: 54.0 MB). Free memory was 97.2 MB in the beginning and 183.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.42 ms. Allocated memory is still 205.0 MB. Free memory was 183.5 MB in the beginning and 170.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2323.22 ms. Allocated memory was 205.0 MB in the beginning and 230.2 MB in the end (delta: 25.2 MB). Free memory was 169.9 MB in the beginning and 103.5 MB in the end (delta: 66.4 MB). Peak memory consumption was 91.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L28] signed char x = __VERIFIER_nondet_char(); [L29] signed char y = __VERIFIER_nondet_char(); [L30] signed char g; [L32] CALL, EXPR gcd_test(x, y) [L12] signed char t; [L14] COND FALSE !(a < (signed char)0) [L15] COND TRUE b < (signed char)0 [L15] b = -b [L17] COND TRUE b != (signed char)0 [L18] t = b [L19] b = a % b [L20] a = t [L17] COND FALSE !(b != (signed char)0) [L22] return a; [L32] RET, EXPR gcd_test(x, y) [L32] g = gcd_test(x, y) [L34] COND TRUE x > (signed char)0 [L35] CALL __VERIFIER_assert(x >= g) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 22 SDslu, 168 SDs, 0 SdLazy, 99 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 3582 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...