/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=SHALLOWEST --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/array-programs/partial_mod_count_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:51:20,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:51:20,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:51:20,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:51:20,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:51:20,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:51:20,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:51:20,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:51:20,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:51:20,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:51:20,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:51:20,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:51:20,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:51:20,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:51:20,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:51:20,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:51:20,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:51:20,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:51:20,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:51:20,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:51:20,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:51:20,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:51:20,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:51:20,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:51:20,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:51:20,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:51:20,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:51:20,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:51:20,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:51:20,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:51:20,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:51:20,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:51:20,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:51:20,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:51:20,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:51:20,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:51:20,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:51:20,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:51:20,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:51:20,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:51:20,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:51:20,297 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 [2020-10-26 19:51:20,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:51:20,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:51:20,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:51:20,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:51:20,327 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:51:20,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:51:20,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:51:20,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:51:20,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:51:20,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:51:20,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:51:20,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:51:20,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:51:20,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:51:20,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:51:20,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:51:20,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:51:20,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:51:20,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:51:20,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:51:20,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:51:20,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:51:20,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:51:20,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:51:20,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:51:20,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:51:20,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:51:20,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:51:20,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:51:20,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:51:20,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:51:20,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:51:20,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:51:20,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:51:20,761 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:51:20,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_1.c [2020-10-26 19:51:20,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28cdc015/948cd650a9514e28afa8b1e9662f0edd/FLAG757c402c2 [2020-10-26 19:51:21,539 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:51:21,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/partial_mod_count_1.c [2020-10-26 19:51:21,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28cdc015/948cd650a9514e28afa8b1e9662f0edd/FLAG757c402c2 [2020-10-26 19:51:21,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a28cdc015/948cd650a9514e28afa8b1e9662f0edd [2020-10-26 19:51:21,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:51:21,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:51:21,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:21,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:51:21,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:51:21,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:21" (1/1) ... [2020-10-26 19:51:21,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5c9b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:21, skipping insertion in model container [2020-10-26 19:51:21,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:21" (1/1) ... [2020-10-26 19:51:21,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:51:21,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:51:22,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:22,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:51:22,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:22,151 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:51:22,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22 WrapperNode [2020-10-26 19:51:22,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:22,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:51:22,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:51:22,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:51:22,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (1/1) ... [2020-10-26 19:51:22,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:51:22,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:51:22,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:51:22,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:51:22,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (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 [2020-10-26 19:51:22,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:51:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:51:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:51:22,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:51:22,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:51:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:51:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:51:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:51:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:51:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:51:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:51:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:51:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:51:22,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:51:22,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:51:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:51:22,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:51:22,929 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:51:22,929 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:51:22,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:22 BoogieIcfgContainer [2020-10-26 19:51:22,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:51:22,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:51:22,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:51:22,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:51:22,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:51:21" (1/3) ... [2020-10-26 19:51:22,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a904d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:22, skipping insertion in model container [2020-10-26 19:51:22,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:22" (2/3) ... [2020-10-26 19:51:22,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a904d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:22, skipping insertion in model container [2020-10-26 19:51:22,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:22" (3/3) ... [2020-10-26 19:51:22,945 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2020-10-26 19:51:22,960 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:51:22,967 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:51:22,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:51:23,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:51:23,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:51:23,022 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:51:23,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:51:23,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:51:23,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:51:23,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:51:23,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:51:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 19:51:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 19:51:23,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:23,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:23,053 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1115320526, now seen corresponding path program 1 times [2020-10-26 19:51:23,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:23,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698732651] [2020-10-26 19:51:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:23,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:51:23,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-26 19:51:23,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:51:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:51:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:51:24,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:24,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:24,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:24,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:51:24,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:24,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:24,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:24,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:24,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:51:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:24,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698732651] [2020-10-26 19:51:24,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:24,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 19:51:24,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262479204] [2020-10-26 19:51:24,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:51:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:51:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:51:24,306 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-10-26 19:51:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:24,667 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-26 19:51:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:51:24,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-26 19:51:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:24,677 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:51:24,677 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:51:24,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:51:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:51:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-26 19:51:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:51:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-26 19:51:24,731 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2020-10-26 19:51:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:24,731 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-26 19:51:24,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:51:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-26 19:51:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:51:24,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:24,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:24,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:51:24,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -278712185, now seen corresponding path program 1 times [2020-10-26 19:51:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:24,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464426273] [2020-10-26 19:51:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:24,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:25,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:25,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:51:25,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1189 [2020-10-26 19:51:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:51:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:26,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:26,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:26,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:26,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:51:26,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:26,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:26,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:26,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:26,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:26,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-26 19:51:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:26,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:51:26,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:26,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:26,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:26,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:26,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:51:26,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:26,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:51:26,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464426273] [2020-10-26 19:51:26,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:26,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:51:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158569274] [2020-10-26 19:51:26,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:51:26,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:26,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:51:26,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:26,067 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-10-26 19:51:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:26,212 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-10-26 19:51:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:51:26,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:51:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:26,214 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:51:26,214 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:51:26,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:51:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-26 19:51:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:51:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-26 19:51:26,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-26 19:51:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:26,227 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-26 19:51:26,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:51:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-26 19:51:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:51:26,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:26,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:26,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:51:26,229 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1166246121, now seen corresponding path program 1 times [2020-10-26 19:51:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:26,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730335079] [2020-10-26 19:51:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:27,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:30,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:51:30,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:51:30,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4020 [2020-10-26 19:51:30,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:30,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:51:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:51:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:51:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:30,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:30,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:51:30,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:30,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:30,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:51:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:30,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:51:30,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:30,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:30,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:30,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:51:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:51:30,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730335079] [2020-10-26 19:51:30,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:30,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:51:30,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106379111] [2020-10-26 19:51:30,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:51:30,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:30,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:51:30,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:30,400 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2020-10-26 19:51:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:30,648 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-10-26 19:51:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:51:30,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-26 19:51:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:30,652 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:51:30,652 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:51:30,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:51:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:51:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-26 19:51:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:51:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-26 19:51:30,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 26 [2020-10-26 19:51:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:30,677 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-26 19:51:30,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:51:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-26 19:51:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:51:30,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:30,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:30,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:51:30,683 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1150876101, now seen corresponding path program 1 times [2020-10-26 19:51:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:30,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626968499] [2020-10-26 19:51:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:30,705 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-26 19:51:30,705 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-26 19:51:30,705 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 19:51:30,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:51:30,727 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-26 19:51:30,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:51:30 BoogieIcfgContainer [2020-10-26 19:51:30,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 19:51:30,730 INFO L168 Benchmark]: Toolchain (without parser) took 8835.75 ms. Allocated memory was 157.3 MB in the beginning and 276.8 MB in the end (delta: 119.5 MB). Free memory was 133.2 MB in the beginning and 237.6 MB in the end (delta: -104.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-10-26 19:51:30,731 INFO L168 Benchmark]: CDTParser took 1.70 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-26 19:51:30,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.61 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 122.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-26 19:51:30,733 INFO L168 Benchmark]: Boogie Preprocessor took 42.79 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-26 19:51:30,734 INFO L168 Benchmark]: RCFGBuilder took 734.51 ms. Allocated memory is still 157.3 MB. Free memory was 121.1 MB in the beginning and 140.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-10-26 19:51:30,735 INFO L168 Benchmark]: TraceAbstraction took 7792.43 ms. Allocated memory was 157.3 MB in the beginning and 276.8 MB in the end (delta: 119.5 MB). Free memory was 139.6 MB in the beginning and 237.6 MB in the end (delta: -98.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2020-10-26 19:51:30,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.70 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.61 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 122.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.79 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 734.51 ms. Allocated memory is still 157.3 MB. Free memory was 121.1 MB in the beginning and 140.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7792.43 ms. Allocated memory was 157.3 MB in the beginning and 276.8 MB in the end (delta: 119.5 MB). Free memory was 139.6 MB in the beginning and 237.6 MB in the end (delta: -98.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L6] int N = 1000000; [L8] int i,j=0,a[N]; [L9] unsigned int R=1; [L10] i=0 [L10] COND TRUE iN/2) [L10] i++ [L10] COND TRUE iN/2 [L13] a[i]=i%R [L10] i++ [L10] COND FALSE !(i