/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:19:24,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:19:24,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:19:24,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:19:24,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:19:24,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:19:24,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:19:24,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:19:24,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:19:24,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:19:24,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:19:24,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:19:24,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:19:24,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:19:24,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:19:24,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:19:24,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:19:24,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:19:24,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:19:24,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:19:24,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:19:24,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:19:24,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:19:24,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:19:24,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:19:24,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:19:24,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:19:24,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:19:24,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:19:24,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:19:24,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:19:24,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:19:24,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:19:24,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:19:24,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:19:24,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:19:24,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:19:24,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:19:24,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:19:24,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:19:24,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:19:24,865 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 [2020-09-25 02:19:24,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:19:24,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:19:24,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:19:24,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:19:24,913 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:19:24,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:19:24,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:19:24,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:19:24,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:19:24,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:19:24,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:19:24,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:19:24,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:19:24,916 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:19:24,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:19:24,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:19:24,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:19:24,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:19:24,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:19:24,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:19:24,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:19:24,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:24,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:19:24,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:19:24,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:19:24,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:19:24,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:19:24,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:19:24,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:19:24,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:19:25,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:19:25,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:19:25,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:19:25,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:19:25,392 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:19:25,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-25 02:19:25,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ded0ed22/7eb8af629eec45d0ad70048a4b030357/FLAG458c4ed7b [2020-09-25 02:19:26,017 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:26,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-25 02:19:26,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ded0ed22/7eb8af629eec45d0ad70048a4b030357/FLAG458c4ed7b [2020-09-25 02:19:26,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ded0ed22/7eb8af629eec45d0ad70048a4b030357 [2020-09-25 02:19:26,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:26,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:26,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:26,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:26,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:26,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26, skipping insertion in model container [2020-09-25 02:19:26,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:26,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:26,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:26,653 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:26,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:26,701 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:26,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26 WrapperNode [2020-09-25 02:19:26,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:26,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:26,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:26,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:26,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (1/1) ... [2020-09-25 02:19:26,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:26,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:26,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:26,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:26,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (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 [2020-09-25 02:19:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:19:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:19:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:19:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:19:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:19:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:26,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:27,156 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:27,156 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:19:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:27 BoogieIcfgContainer [2020-09-25 02:19:27,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:27,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:27,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:27,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:27,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:26" (1/3) ... [2020-09-25 02:19:27,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a197774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:27, skipping insertion in model container [2020-09-25 02:19:27,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:26" (2/3) ... [2020-09-25 02:19:27,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a197774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:27, skipping insertion in model container [2020-09-25 02:19:27,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:27" (3/3) ... [2020-09-25 02:19:27,171 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-25 02:19:27,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:27,195 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:19:27,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:19:27,250 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:27,251 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:27,251 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:27,251 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:27,251 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:27,251 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:27,252 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:27,252 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 02:19:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 02:19:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:27,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:27,289 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-25 02:19:27,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:27,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775484452] [2020-09-25 02:19:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:27,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:27,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:19:27,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:27,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-25 02:19:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 02:19:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:19:27,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:27,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:27,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:27,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:27,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:27,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 02:19:27,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:27,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:27,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:27,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:27,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:27,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775484452] [2020-09-25 02:19:27,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:27,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:19:27,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340080258] [2020-09-25 02:19:27,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:19:27,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:19:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:27,688 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-25 02:19:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:27,798 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-25 02:19:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:19:27,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-25 02:19:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:27,817 INFO L225 Difference]: With dead ends: 45 [2020-09-25 02:19:27,817 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 02:19:27,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 02:19:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 02:19:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 02:19:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-25 02:19:27,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-25 02:19:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:27,863 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-25 02:19:27,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:19:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-25 02:19:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 02:19:27,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:27,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:27,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:27,865 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-25 02:19:27,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:27,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814390259] [2020-09-25 02:19:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:27,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:27,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:19:27,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:27,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 02:19:27,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 02:19:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:19:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:28,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:28,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:28,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 02:19:28,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:28,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814390259] [2020-09-25 02:19:28,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:28,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:19:28,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158473325] [2020-09-25 02:19:28,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:19:28,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:19:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:28,052 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-25 02:19:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:28,107 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 02:19:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:19:28,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-25 02:19:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:28,109 INFO L225 Difference]: With dead ends: 31 [2020-09-25 02:19:28,109 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 02:19:28,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 02:19:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-25 02:19:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 02:19:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 02:19:28,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 02:19:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:28,117 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 02:19:28,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:19:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 02:19:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 02:19:28,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:28,119 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, 1] [2020-09-25 02:19:28,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:28,119 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-25 02:19:28,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:28,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903913008] [2020-09-25 02:19:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:28,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:28,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 02:19:28,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-09-25 02:19:28,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 02:19:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 02:19:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:19:28,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:28,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:28,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:19:28,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:28,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:28,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:28,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:28,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:28,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903913008] [2020-09-25 02:19:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:19:28,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549911729] [2020-09-25 02:19:28,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:28,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:28,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:28,585 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-25 02:19:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:28,678 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 02:19:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:28,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-25 02:19:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:28,680 INFO L225 Difference]: With dead ends: 36 [2020-09-25 02:19:28,680 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 02:19:28,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 02:19:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 02:19:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 02:19:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 02:19:28,687 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 02:19:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:28,688 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 02:19:28,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 02:19:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 02:19:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:28,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:28,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:28,690 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:28,690 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-25 02:19:28,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:28,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971386399] [2020-09-25 02:19:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:29,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:29,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 02:19:29,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:19:29,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-25 02:19:29,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:29,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:19:29,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 02:19:29,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:19:29,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:29,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:29,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:29,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:29,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:29,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:29,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:19:29,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:19:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971386399] [2020-09-25 02:19:29,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:29,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 02:19:29,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581459851] [2020-09-25 02:19:29,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:19:29,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:19:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:29,939 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-09-25 02:19:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:30,135 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-25 02:19:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:19:30,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-09-25 02:19:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:30,136 INFO L225 Difference]: With dead ends: 27 [2020-09-25 02:19:30,137 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:19:30,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:19:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:19:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:19:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:19:30,142 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-09-25 02:19:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:30,142 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:19:30,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:19:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:19:30,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:19:30,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:30,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:19:30,270 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,270 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,271 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,271 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-25 02:19:30,271 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,271 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,272 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 02:19:30,272 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:19:30,272 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:19:30,273 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 19) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-25 02:19:30,273 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2020-09-25 02:19:30,273 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= 1023 |main_#t~mem1|) (= 1023 (select (select |#memory_int| |main_~#A~0.base|) (+ |main_~#A~0.offset| 4092)))) [2020-09-25 02:19:30,273 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-25 02:19:30,273 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 02:19:30,274 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 02:19:30,274 INFO L268 CegarLoopResult]: For program point L15-1(lines 14 16) no Hoare annotation was computed. [2020-09-25 02:19:30,274 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2020-09-25 02:19:30,274 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-09-25 02:19:30,275 INFO L268 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-09-25 02:19:30,275 INFO L268 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-09-25 02:19:30,275 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-09-25 02:19:30,275 INFO L264 CegarLoopResult]: At program point L14-5(lines 14 16) the Hoare annotation is: (or (<= main_~i~0 1023) (= 1023 (select (select |#memory_int| |main_~#A~0.base|) (+ |main_~#A~0.offset| 4092)))) [2020-09-25 02:19:30,275 INFO L268 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-09-25 02:19:30,276 INFO L268 CegarLoopResult]: For program point L14-6(lines 14 16) no Hoare annotation was computed. [2020-09-25 02:19:30,276 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 02:19:30,276 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 02:19:30,276 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 02:19:30,276 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 02:19:30,277 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 02:19:30,277 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 02:19:30,292 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-25 02:19:30,303 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-25 02:19:30,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:19:30 BoogieIcfgContainer [2020-09-25 02:19:30,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:19:30,315 INFO L168 Benchmark]: Toolchain (without parser) took 3934.10 ms. Allocated memory was 147.8 MB in the beginning and 242.7 MB in the end (delta: 94.9 MB). Free memory was 104.2 MB in the beginning and 186.5 MB in the end (delta: -82.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,317 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.26 ms. Allocated memory is still 147.8 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,323 INFO L168 Benchmark]: Boogie Preprocessor took 131.38 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.8 MB in the beginning and 182.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,330 INFO L168 Benchmark]: RCFGBuilder took 327.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 169.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,331 INFO L168 Benchmark]: TraceAbstraction took 3147.13 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 168.7 MB in the beginning and 186.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:30,337 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 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.26 ms. Allocated memory is still 147.8 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.38 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.8 MB in the beginning and 182.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 169.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3147.13 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 168.7 MB in the beginning and 186.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 14]: Loop Invariant [2020-09-25 02:19:30,345 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-25 02:19:30,345 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: i <= 1023 || 1023 == unknown-#memory_int-unknown[A][A + 4092] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 31 SDslu, 113 SDs, 0 SdLazy, 150 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 42 HoareAnnotationTreeSize, 10 FomulaSimplifications, 31 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 4395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 7/8 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...