/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:58:49,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:58:49,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:58:49,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:58:49,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:58:49,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:58:49,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:58:49,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:58:49,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:58:49,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:58:49,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:58:49,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:58:49,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:58:49,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:58:49,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:58:49,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:58:49,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:58:49,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:58:49,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:58:49,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:58:49,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:58:49,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:58:49,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:58:49,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:58:49,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:58:49,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:58:49,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:58:49,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:58:49,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:58:49,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:58:49,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:58:49,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:58:49,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:58:49,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:58:49,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:58:49,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:58:49,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:58:49,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:58:49,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:58:49,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:58:49,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:58:49,329 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 01:58:49,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:58:49,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:58:49,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:58:49,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:58:49,395 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:58:49,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:58:49,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:58:49,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:58:49,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:58:49,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:58:49,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:58:49,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:58:49,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:58:49,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:58:49,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:58:49,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:58:49,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:58:49,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:58:49,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:58:49,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:58:49,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:58:49,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:58:49,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:58:49,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:58:49,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:58:49,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:58:49,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:58:49,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:58:49,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:58:49,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:58:49,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:58:49,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:58:49,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:58:49,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:58:49,906 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:58:49,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-27 01:58:49,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12080e378/7ff9ae76843f463cb251e0f7ceee3e8b/FLAG1f031fd46 [2020-10-27 01:58:50,718 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:58:50,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-10-27 01:58:50,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12080e378/7ff9ae76843f463cb251e0f7ceee3e8b/FLAG1f031fd46 [2020-10-27 01:58:51,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12080e378/7ff9ae76843f463cb251e0f7ceee3e8b [2020-10-27 01:58:51,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:58:51,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:58:51,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:51,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:58:51,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:58:51,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fe9b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51, skipping insertion in model container [2020-10-27 01:58:51,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:58:51,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:58:51,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:51,319 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:58:51,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:51,356 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:58:51,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51 WrapperNode [2020-10-27 01:58:51,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:51,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:58:51,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:58:51,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:58:51,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (1/1) ... [2020-10-27 01:58:51,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:58:51,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:58:51,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:58:51,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:58:51,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (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 01:58:51,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:58:51,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:58:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:58:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:58:51,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:58:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:58:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:58:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:58:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:58:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:58:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:58:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:58:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:58:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:58:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:58:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:58:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:58:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:58:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:58:51,999 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:58:51,999 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:58:52,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:52 BoogieIcfgContainer [2020-10-27 01:58:52,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:58:52,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:58:52,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:58:52,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:58:52,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:58:51" (1/3) ... [2020-10-27 01:58:52,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3795c1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:52, skipping insertion in model container [2020-10-27 01:58:52,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:51" (2/3) ... [2020-10-27 01:58:52,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3795c1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:52, skipping insertion in model container [2020-10-27 01:58:52,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:52" (3/3) ... [2020-10-27 01:58:52,017 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-27 01:58:52,030 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:58:52,034 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:58:52,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:58:52,088 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:58:52,088 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:58:52,089 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:58:52,089 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:58:52,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:58:52,089 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:58:52,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:58:52,090 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:58:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:58:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:58:52,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:52,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:52,117 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-27 01:58:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:52,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661049112] [2020-10-27 01:58:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:58:52,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 01:58:52,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:58:52,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:52,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:58:52,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,772 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 01:58:52,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661049112] [2020-10-27 01:58:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:58:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588493583] [2020-10-27 01:58:52,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:52,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:52,813 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-27 01:58:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:53,141 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-10-27 01:58:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:53,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 01:58:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:53,150 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:58:53,150 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:58:53,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:58:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:58:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:58:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:58:53,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-27 01:58:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:53,226 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:58:53,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:58:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:58:53,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:53,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:53,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:58:53,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-27 01:58:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:53,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098549614] [2020-10-27 01:58:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:58:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 01:58:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:58:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:58:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:53,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:58:53,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:53,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:53,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:53,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:53,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098549614] [2020-10-27 01:58:53,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:53,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:58:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717177363] [2020-10-27 01:58:53,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:58:53,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:58:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:53,458 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-27 01:58:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:53,596 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-27 01:58:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:58:53,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:58:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:53,598 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:58:53,598 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:58:53,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 01:58:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:58:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 01:58:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:58:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:58:53,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-27 01:58:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:53,610 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:58:53,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:58:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:58:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:58:53,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:53,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:53,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:58:53,612 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-10-27 01:58:53,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:53,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930292411] [2020-10-27 01:58:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:58:53,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:53,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 01:58:53,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:53,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:58:53,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:58:54,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:54,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930292411] [2020-10-27 01:58:54,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:58:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888057494] [2020-10-27 01:58:54,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:54,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:54,047 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-27 01:58:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:54,227 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-27 01:58:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:58:54,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:58:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:54,229 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:58:54,229 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:58:54,230 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 01:58:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:58:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:58:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:58:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-27 01:58:54,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-10-27 01:58:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:54,237 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-27 01:58:54,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-27 01:58:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:58:54,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:54,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:54,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:58:54,239 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:54,240 INFO L82 PathProgramCache]: Analyzing trace with hash 701699446, now seen corresponding path program 3 times [2020-10-27 01:58:54,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:54,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582013873] [2020-10-27 01:58:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:58:54,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:58:54,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-27 01:58:54,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:58:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:58:54,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:54,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:54,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582013873] [2020-10-27 01:58:54,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:58:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641809479] [2020-10-27 01:58:54,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:58:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:58:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:54,614 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-27 01:58:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:54,827 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-27 01:58:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:54,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 01:58:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:54,828 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:58:54,829 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:58:54,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:58:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 01:58:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:58:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 01:58:54,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-27 01:58:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:54,837 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 01:58:54,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:58:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 01:58:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:58:54,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:54,838 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 01:58:54,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:58:54,839 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash -312331939, now seen corresponding path program 1 times [2020-10-27 01:58:54,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:54,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807490674] [2020-10-27 01:58:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-27 01:58:55,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:58:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:58:55,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:55,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:55,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:55,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:55,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:55,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:55,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807490674] [2020-10-27 01:58:55,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:55,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:58:55,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044001407] [2020-10-27 01:58:55,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:58:55,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:55,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:58:55,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:55,476 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-27 01:58:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:55,728 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:58:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:58:55,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 01:58:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:55,731 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:58:55,731 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:58:55,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 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 01:58:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:58:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 01:58:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:58:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 01:58:55,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-27 01:58:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:55,740 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 01:58:55,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:58:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 01:58:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:58:55,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:55,741 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:55,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:58:55,742 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:55,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1478637590, now seen corresponding path program 2 times [2020-10-27 01:58:55,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:55,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307778270] [2020-10-27 01:58:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:56,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:56,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:58:56,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:58:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 01:58:56,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:58:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:58:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:56,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:56,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:56,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:56,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307778270] [2020-10-27 01:58:56,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:56,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:58:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554869582] [2020-10-27 01:58:56,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:58:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:58:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:58:56,240 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-27 01:58:56,568 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-27 01:58:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:56,652 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 01:58:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:58:56,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-27 01:58:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:56,654 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:58:56,654 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:58:56,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:58:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:58:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 01:58:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:58:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 01:58:56,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-10-27 01:58:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:56,662 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 01:58:56,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:58:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 01:58:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:58:56,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:56,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:56,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:58:56,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash -126842179, now seen corresponding path program 3 times [2020-10-27 01:58:56,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:56,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111991981] [2020-10-27 01:58:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:56,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:57,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:58:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:58:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 01:58:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:58:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:57,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:57,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:57,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:57,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:57,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:58:57,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:57,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:57,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:57,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111991981] [2020-10-27 01:58:57,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:57,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457936650] [2020-10-27 01:58:57,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:57,166 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-10-27 01:58:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:57,501 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-27 01:58:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:57,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:58:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:57,505 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:58:57,505 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:58:57,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:58:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:58:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-27 01:58:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:58:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-27 01:58:57,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2020-10-27 01:58:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:57,524 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-27 01:58:57,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-27 01:58:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:58:57,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:57,528 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:57,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:58:57,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -218832202, now seen corresponding path program 4 times [2020-10-27 01:58:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:57,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001655803] [2020-10-27 01:58:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:57,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:57,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:58:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:57,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:58:57,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:57,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:57,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:57,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:57,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:57,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:57,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:57,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001655803] [2020-10-27 01:58:57,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:57,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010557904] [2020-10-27 01:58:57,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:57,889 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-27 01:58:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:58,330 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-27 01:58:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:58:58,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:58:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:58,333 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:58:58,333 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:58:58,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:58:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:58:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:58:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:58:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 01:58:58,343 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2020-10-27 01:58:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:58,344 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 01:58:58,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 01:58:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:58:58,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:58,345 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 01:58:58,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:58:58,345 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash -504472547, now seen corresponding path program 5 times [2020-10-27 01:58:58,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:58,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556217158] [2020-10-27 01:58:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:58:58,364 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:58:58,364 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:58:58,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:58:58,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:58:58 BoogieIcfgContainer [2020-10-27 01:58:58,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:58:58,404 INFO L168 Benchmark]: Toolchain (without parser) took 7312.60 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 139.3 MB in the beginning and 104.1 MB in the end (delta: 35.2 MB). Peak memory consumption was 109.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:58,405 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 163.6 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:58:58,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.95 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 128.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:58,406 INFO L168 Benchmark]: Boogie Preprocessor took 39.77 ms. Allocated memory is still 163.6 MB. Free memory was 128.9 MB in the beginning and 127.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:58,407 INFO L168 Benchmark]: RCFGBuilder took 602.68 ms. Allocated memory is still 163.6 MB. Free memory was 127.3 MB in the beginning and 114.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:58,408 INFO L168 Benchmark]: TraceAbstraction took 6396.13 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 114.6 MB in the beginning and 104.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:58,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 163.6 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.95 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 128.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.77 ms. Allocated memory is still 163.6 MB. Free memory was 128.9 MB in the beginning and 127.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 602.68 ms. Allocated memory is still 163.6 MB. Free memory was 127.3 MB in the beginning and 114.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6396.13 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 114.6 MB in the beginning and 104.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 85.5 MB. 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: 6.2s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 105 SDtfs, 264 SDslu, 172 SDs, 0 SdLazy, 340 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.8s 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 13740 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 0/196 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...