/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:21:18,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:21:18,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:21:18,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:21:18,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:21:18,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:21:18,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:21:18,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:21:18,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:21:18,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:21:18,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:21:18,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:21:18,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:21:18,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:21:18,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:21:18,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:21:18,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:21:18,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:21:18,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:21:18,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:21:18,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:21:18,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:21:18,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:21:18,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:21:18,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:21:18,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:21:18,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:21:18,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:21:18,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:21:18,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:21:18,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:21:18,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:21:18,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:21:18,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:21:18,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:21:18,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:21:18,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:21:18,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:21:18,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:21:18,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:21:18,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:21:18,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:21:18,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:21:18,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:21:18,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:21:18,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:21:18,856 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:21:18,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:21:18,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:21:18,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:21:18,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:21:18,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:21:18,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:21:18,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:21:18,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:21:18,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:21:18,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:21:18,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:21:18,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:21:18,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:21:18,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:21:18,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:21:18,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:21:18,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:18,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:21:18,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:21:18,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:21:18,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:21:18,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:21:18,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:21:18,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:21:18,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:21:19,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:21:19,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:21:19,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:21:19,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:21:19,376 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:21:19,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-09-21 12:21:19,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6efa715c8/35c2960b22d74e318894b44d99fc10e2/FLAG490355c18 [2020-09-21 12:21:20,025 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:21:20,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Addition01-2.c [2020-09-21 12:21:20,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6efa715c8/35c2960b22d74e318894b44d99fc10e2/FLAG490355c18 [2020-09-21 12:21:20,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6efa715c8/35c2960b22d74e318894b44d99fc10e2 [2020-09-21 12:21:20,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:21:20,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:21:20,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:20,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:21:20,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:21:20,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20, skipping insertion in model container [2020-09-21 12:21:20,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:21:20,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:21:20,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:20,659 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:21:20,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:21:20,694 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:21:20,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20 WrapperNode [2020-09-21 12:21:20,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:21:20,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:21:20,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:21:20,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:21:20,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... [2020-09-21 12:21:20,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:21:20,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:21:20,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:21:20,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:21:20,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:21:20,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:21:20,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:21:20,907 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-09-21 12:21:20,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:21:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:21:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:21:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-09-21 12:21:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:21:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:21:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:21:21,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:21:21,138 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:21:21,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:21 BoogieIcfgContainer [2020-09-21 12:21:21,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:21:21,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:21:21,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:21:21,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:21:21,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:21:20" (1/3) ... [2020-09-21 12:21:21,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baf05e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:21, skipping insertion in model container [2020-09-21 12:21:21,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:21:20" (2/3) ... [2020-09-21 12:21:21,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7baf05e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:21:21, skipping insertion in model container [2020-09-21 12:21:21,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:21:21" (3/3) ... [2020-09-21 12:21:21,156 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-09-21 12:21:21,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:21:21,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:21:21,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:21:21,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:21:21,282 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:21:21,282 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:21:21,282 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:21:21,282 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:21:21,283 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:21:21,283 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:21:21,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:21:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-21 12:21:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 12:21:21,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:21,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:21,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-09-21 12:21:21,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:21,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192661864] [2020-09-21 12:21:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:21:21,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-21 12:21:21,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:21:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:21,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:21:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:21,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:21:21,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:21,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:21,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:21:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:21,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:21,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:21,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:21:21,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:21:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:21:22,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192661864] [2020-09-21 12:21:22,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:22,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:21:22,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283621342] [2020-09-21 12:21:22,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:21:22,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:21:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:22,041 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-09-21 12:21:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:22,221 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-09-21 12:21:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:21:22,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-21 12:21:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:22,237 INFO L225 Difference]: With dead ends: 38 [2020-09-21 12:21:22,238 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 12:21:22,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 12:21:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 12:21:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:21:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-09-21 12:21:22,302 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-09-21 12:21:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:22,303 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-09-21 12:21:22,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:21:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-09-21 12:21:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:21:22,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:22,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:22,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:21:22,307 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-09-21 12:21:22,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:22,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025485113] [2020-09-21 12:21:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:21:22,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:21:22,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-21 12:21:22,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:22,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:21:22,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:21:22,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:21:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:22,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:22,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:22,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:21:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:21:22,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:21:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:21:22,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025485113] [2020-09-21 12:21:22,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:21:22,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:21:22,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319459423] [2020-09-21 12:21:22,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:21:22,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:21:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:22,540 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-09-21 12:21:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:22,572 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-09-21 12:21:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:21:22,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-09-21 12:21:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:22,574 INFO L225 Difference]: With dead ends: 34 [2020-09-21 12:21:22,575 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 12:21:22,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:21:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 12:21:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-21 12:21:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:21:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-21 12:21:22,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-09-21 12:21:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:22,586 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-21 12:21:22,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:21:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-21 12:21:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:21:22,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:22,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:22,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:21:22,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-09-21 12:21:22,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:22,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409329494] [2020-09-21 12:21:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:21:22,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-09-21 12:21:22,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:21:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:21:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:21:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:22,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:22,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:21:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:22,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:22,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:21:22,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:22,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 12:21:22,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:21:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:23,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:21:23,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:21:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:21:23,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:21:23,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409329494] [2020-09-21 12:21:23,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:23,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:21:23,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894790490] [2020-09-21 12:21:23,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:21:23,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:21:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:21:23,082 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-09-21 12:21:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:23,239 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-09-21 12:21:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:21:23,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-21 12:21:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:23,241 INFO L225 Difference]: With dead ends: 31 [2020-09-21 12:21:23,242 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 12:21:23,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:21:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 12:21:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-09-21 12:21:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:21:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-21 12:21:23,250 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-09-21 12:21:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:23,251 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-21 12:21:23,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:21:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-21 12:21:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:21:23,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:23,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:21:23,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:21:23,253 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2020-09-21 12:21:23,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:23,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624194560] [2020-09-21 12:21:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:21:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:23,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-09-21 12:21:23,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:21:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:23,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:23,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:23,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:21:23,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:23,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:23,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:21:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:21:23,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-21 12:21:23,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:23,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 12:21:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:23,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:23,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:23,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:23,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:21:23,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:23,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:23,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:23,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:23,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:21:23,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624194560] [2020-09-21 12:21:23,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:23,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:21:23,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810320880] [2020-09-21 12:21:23,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:21:23,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:21:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:23,940 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-09-21 12:21:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:24,014 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-09-21 12:21:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:21:24,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:21:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:24,026 INFO L225 Difference]: With dead ends: 31 [2020-09-21 12:21:24,026 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 12:21:24,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:21:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 12:21:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 12:21:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 12:21:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-09-21 12:21:24,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2020-09-21 12:21:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:24,042 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-09-21 12:21:24,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:21:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-09-21 12:21:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:21:24,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:21:24,046 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, 1, 1, 1] [2020-09-21 12:21:24,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:21:24,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:21:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:21:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1459427924, now seen corresponding path program 1 times [2020-09-21 12:21:24,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:21:24,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268249955] [2020-09-21 12:21:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:21:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:24,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 12:21:25,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:21:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:21:25,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:25,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:21:25,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:25,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:21:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:21:25,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:21:25,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:21:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:21:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:21:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:21:25,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:21:25,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-09-21 12:21:25,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-21 12:21:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:21:25,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 12:21:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:21:25,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:21:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 12:21:25,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:21:25,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:21:25,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:21:25,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:21:25,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-21 12:21:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:21:25,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:21:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:21:25,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:21:25,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:21:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:21:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:21:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:21:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:21:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:21:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:21:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 12:21:25,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268249955] [2020-09-21 12:21:25,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:21:25,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:21:25,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095494603] [2020-09-21 12:21:25,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:21:25,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:21:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:21:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:21:25,673 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-09-21 12:21:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:21:25,742 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-09-21 12:21:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:21:25,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-21 12:21:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:21:25,743 INFO L225 Difference]: With dead ends: 32 [2020-09-21 12:21:25,743 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:21:25,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:21:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:21:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:21:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:21:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:21:25,746 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-09-21 12:21:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:21:25,746 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:21:25,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:21:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:21:25,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:21:25,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:21:25,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:21:25,925 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:21:25,925 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:21:25,925 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:21:25,925 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:21:25,926 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:21:25,926 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:21:25,926 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-09-21 12:21:25,926 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 45) the Hoare annotation is: true [2020-09-21 12:21:25,926 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-21 12:21:25,926 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 45) no Hoare annotation was computed. [2020-09-21 12:21:25,927 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 45) no Hoare annotation was computed. [2020-09-21 12:21:25,927 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-21 12:21:25,927 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-09-21 12:21:25,927 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (<= 0 main_~n~0) [2020-09-21 12:21:25,927 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-09-21 12:21:25,927 INFO L268 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2020-09-21 12:21:25,928 INFO L268 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2020-09-21 12:21:25,928 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= (+ addition_~n 1) 0) (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m)) [2020-09-21 12:21:25,928 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-09-21 12:21:25,928 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-09-21 12:21:25,928 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= 1 addition_~n)) [2020-09-21 12:21:25,928 INFO L268 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-09-21 12:21:25,929 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-21 12:21:25,929 INFO L271 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2020-09-21 12:21:25,929 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-09-21 12:21:25,929 INFO L268 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2020-09-21 12:21:25,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:21:25 BoogieIcfgContainer [2020-09-21 12:21:25,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:21:25,940 INFO L168 Benchmark]: Toolchain (without parser) took 5569.55 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 102.6 MB in the beginning and 184.7 MB in the end (delta: -82.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,941 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.00 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,943 INFO L168 Benchmark]: Boogie Preprocessor took 48.03 ms. Allocated memory is still 139.5 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,944 INFO L168 Benchmark]: RCFGBuilder took 402.10 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 169.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,945 INFO L168 Benchmark]: TraceAbstraction took 4790.09 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 169.1 MB in the beginning and 184.7 MB in the end (delta: -15.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:21:25,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.00 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.03 ms. Allocated memory is still 139.5 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.10 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 169.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4790.09 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 169.1 MB in the beginning and 184.7 MB in the end (delta: -15.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 101 SDtfs, 45 SDslu, 191 SDs, 0 SdLazy, 234 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 30 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 21 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 6074 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...