/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:36:45,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:36:45,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:36:45,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:36:45,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:36:45,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:36:45,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:36:45,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:36:45,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:36:45,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:36:45,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:36:45,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:36:45,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:36:45,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:36:45,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:36:45,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:36:45,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:36:45,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:36:45,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:36:45,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:36:45,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:36:45,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:36:45,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:36:45,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:36:45,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:36:45,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:36:45,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:36:45,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:36:45,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:36:45,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:36:45,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:36:45,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:36:45,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:36:45,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:36:45,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:36:45,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:36:45,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:36:45,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:36:45,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:36:45,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:36:45,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:36:45,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:36:45,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:36:45,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:36:45,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:36:45,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:36:45,962 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:36:45,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:36:45,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:36:45,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:36:45,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:36:45,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:36:45,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:36:45,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:36:45,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:36:45,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:36:45,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:36:45,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:36:45,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:36:45,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:36:45,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:36:45,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:36:45,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:36:45,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:36:45,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:36:45,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:36:45,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:36:45,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:36:45,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:36:45,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:36:45,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:36:45,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:36:46,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:36:46,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:36:46,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:36:46,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:36:46,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:36:46,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-27 20:36:46,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656db7e70/cb7d56d23f79415298fd81a73014d2a1/FLAGdf893ed81 [2020-10-27 20:36:47,060 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:36:47,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-10-27 20:36:47,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656db7e70/cb7d56d23f79415298fd81a73014d2a1/FLAGdf893ed81 [2020-10-27 20:36:47,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/656db7e70/cb7d56d23f79415298fd81a73014d2a1 [2020-10-27 20:36:47,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:36:47,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:36:47,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:47,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:36:47,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:36:47,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c38d631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47, skipping insertion in model container [2020-10-27 20:36:47,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:36:47,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:36:47,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:47,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:36:47,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:47,696 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:36:47,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47 WrapperNode [2020-10-27 20:36:47,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:47,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:36:47,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:36:47,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:36:47,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... [2020-10-27 20:36:47,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:36:47,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:36:47,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:36:47,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:36:47,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:36:47,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:36:47,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:36:47,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:36:47,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:36:47,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:36:47,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:36:47,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:36:47,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:36:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:36:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:36:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:36:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:36:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:36:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:36:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:36:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:36:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:36:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:36:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:36:48,357 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:36:48,357 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:36:48,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:48 BoogieIcfgContainer [2020-10-27 20:36:48,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:36:48,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:36:48,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:36:48,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:36:48,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:36:47" (1/3) ... [2020-10-27 20:36:48,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106fc0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:48, skipping insertion in model container [2020-10-27 20:36:48,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:47" (2/3) ... [2020-10-27 20:36:48,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106fc0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:48, skipping insertion in model container [2020-10-27 20:36:48,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:48" (3/3) ... [2020-10-27 20:36:48,375 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-27 20:36:48,388 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:36:48,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:36:48,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:36:48,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:36:48,464 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:36:48,464 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:36:48,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:36:48,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:36:48,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:36:48,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:36:48,464 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:36:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:36:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:48,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:48,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:48,491 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-27 20:36:48,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:48,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473912099] [2020-10-27 20:36:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:48,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:48,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:48,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 20:36:48,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:48,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:36:49,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:49,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:49,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:49,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:36:49,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:49,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:49,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473912099] [2020-10-27 20:36:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:49,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:36:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222112917] [2020-10-27 20:36:49,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:36:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:36:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:36:49,128 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:36:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:49,209 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-27 20:36:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:36:49,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:36:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:49,221 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:36:49,221 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:36:49,225 INFO L677 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 [2020-10-27 20:36:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:36:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:36:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:36:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:36:49,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-27 20:36:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:49,271 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:36:49,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:36:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:36:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:49,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:49,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:36:49,273 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-10-27 20:36:49,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:49,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788803845] [2020-10-27 20:36:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:49,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:49,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 20:36:49,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:36:49,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:49,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:49,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:49,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:49,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:36:49,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:49,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:49,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788803845] [2020-10-27 20:36:49,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:49,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:36:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567242286] [2020-10-27 20:36:49,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:36:49,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:49,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:36:49,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:36:49,607 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:36:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:49,743 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-27 20:36:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:36:49,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:36:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:49,745 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:36:49,746 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:36:49,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:36:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:36:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:36:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 20:36:49,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-27 20:36:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:49,757 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 20:36:49,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:36:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 20:36:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:36:49,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:49,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:49,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:36:49,759 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-27 20:36:49,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:49,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715237176] [2020-10-27 20:36:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:49,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:49,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:36:49,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:49,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 20:36:49,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:36:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:36:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:49,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:49,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:49,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:49,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:49,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:49,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:49,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:49,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:49,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715237176] [2020-10-27 20:36:49,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:49,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:36:49,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127967228] [2020-10-27 20:36:49,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:36:49,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:36:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:49,936 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-27 20:36:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:50,098 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-27 20:36:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:36:50,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:36:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:50,100 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:36:50,101 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 20:36:50,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 20:36:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-27 20:36:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:36:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:36:50,109 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-27 20:36:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:50,110 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:36:50,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:36:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:36:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:36:50,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:50,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:50,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:36:50,112 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1940905789, now seen corresponding path program 1 times [2020-10-27 20:36:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:50,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856755657] [2020-10-27 20:36:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:50,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:36:50,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:36:50,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-27 20:36:50,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:36:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:36:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:50,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:50,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:50,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:50,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:50,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:50,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:50,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856755657] [2020-10-27 20:36:50,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:50,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:36:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694038162] [2020-10-27 20:36:50,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:36:50,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:36:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:36:50,525 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 20:36:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:50,695 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 20:36:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:36:50,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:36:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:50,698 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:36:50,698 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:36:50,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:36:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-27 20:36:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:36:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 20:36:50,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-27 20:36:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:50,707 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 20:36:50,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:36:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 20:36:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:36:50,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:50,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:50,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:36:50,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1639923254, now seen corresponding path program 2 times [2020-10-27 20:36:50,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:50,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877251509] [2020-10-27 20:36:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:50,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:51,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:36:51,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:36:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:51,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:51,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:51,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:51,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:51,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:51,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:51,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:51,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:51,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:51,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877251509] [2020-10-27 20:36:51,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:51,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:36:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859577043] [2020-10-27 20:36:51,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:36:51,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:36:51,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:51,225 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-27 20:36:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:51,467 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-27 20:36:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:36:51,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 20:36:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:51,469 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:36:51,469 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:36:51,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:36:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:36:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 20:36:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:36:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 20:36:51,476 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2020-10-27 20:36:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:51,477 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 20:36:51,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:36:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 20:36:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:36:51,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:51,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:51,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:36:51,478 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1334030179, now seen corresponding path program 3 times [2020-10-27 20:36:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:51,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795462507] [2020-10-27 20:36:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:51,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:36:51,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:36:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 20:36:51,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:36:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:36:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:51,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:51,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:51,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:51,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:51,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:51,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795462507] [2020-10-27 20:36:51,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:51,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:36:51,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656739149] [2020-10-27 20:36:51,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:36:51,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:36:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:36:51,848 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-10-27 20:36:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:52,100 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 20:36:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:36:52,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 20:36:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:52,103 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:36:52,103 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:36:52,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:36:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:36:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 20:36:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:36:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-27 20:36:52,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 25 [2020-10-27 20:36:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:52,112 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-27 20:36:52,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:36:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-27 20:36:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:36:52,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:52,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:52,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:36:52,115 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1795370794, now seen corresponding path program 4 times [2020-10-27 20:36:52,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:52,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980419435] [2020-10-27 20:36:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:36:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:36:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:52,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:52,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980419435] [2020-10-27 20:36:52,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:52,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:36:52,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547315756] [2020-10-27 20:36:52,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:36:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:36:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:52,668 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-10-27 20:36:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:52,986 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-27 20:36:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:36:52,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-27 20:36:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:52,988 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:36:52,988 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:36:52,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:36:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:36:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 20:36:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:36:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-27 20:36:52,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 28 [2020-10-27 20:36:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:52,996 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-27 20:36:52,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:36:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-27 20:36:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:36:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:52,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:52,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:36:52,997 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1698285059, now seen corresponding path program 5 times [2020-10-27 20:36:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:52,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980743862] [2020-10-27 20:36:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:36:53,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:36:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:53,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:53,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:36:53,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980743862] [2020-10-27 20:36:53,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:53,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:36:53,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849547690] [2020-10-27 20:36:53,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:36:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:53,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:36:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:36:53,247 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-27 20:36:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:53,407 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-10-27 20:36:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:36:53,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-27 20:36:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:53,409 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:36:53,409 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:36:53,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:36:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 20:36:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:36:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 20:36:53,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-27 20:36:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:53,418 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 20:36:53,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:36:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 20:36:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:36:53,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:53,419 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:53,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:36:53,420 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash -504472547, now seen corresponding path program 6 times [2020-10-27 20:36:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:53,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061223424] [2020-10-27 20:36:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:36:53,432 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:36:53,433 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:36:53,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:36:53,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:36:53 BoogieIcfgContainer [2020-10-27 20:36:53,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:36:53,457 INFO L168 Benchmark]: Toolchain (without parser) took 6026.64 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 133.1 MB in the beginning and 186.8 MB in the end (delta: -53.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:53,458 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:36:53,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.59 ms. Allocated memory is still 157.3 MB. Free memory was 132.5 MB in the beginning and 122.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:53,459 INFO L168 Benchmark]: Boogie Preprocessor took 58.52 ms. Allocated memory is still 157.3 MB. Free memory was 122.7 MB in the beginning and 121.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:53,460 INFO L168 Benchmark]: RCFGBuilder took 600.20 ms. Allocated memory is still 157.3 MB. Free memory was 121.2 MB in the beginning and 108.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:53,461 INFO L168 Benchmark]: TraceAbstraction took 5090.33 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 108.4 MB in the beginning and 186.8 MB in the end (delta: -78.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:36:53,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.59 ms. Allocated memory is still 157.3 MB. Free memory was 132.5 MB in the beginning and 122.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.52 ms. Allocated memory is still 157.3 MB. Free memory was 122.7 MB in the beginning and 121.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 600.20 ms. Allocated memory is still 157.3 MB. Free memory was 121.2 MB in the beginning and 108.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5090.33 ms. Allocated memory was 157.3 MB in the beginning and 226.5 MB in the end (delta: 69.2 MB). Free memory was 108.4 MB in the beginning and 186.8 MB in the end (delta: -78.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 193 SDslu, 161 SDs, 0 SdLazy, 261 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 204 NumberOfCodeBlocks, 204 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 9663 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 69/126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...