/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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:58:47,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:58:47,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:58:47,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:58:47,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:58:47,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:58:47,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:58:47,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:58:47,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:58:47,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:58:47,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:58:47,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:58:47,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:58:47,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:58:47,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:58:47,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:58:47,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:58:47,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:58:47,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:58:47,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:58:47,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:58:47,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:58:47,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:58:47,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:58:47,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:58:47,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:58:47,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:58:47,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:58:47,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:58:47,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:58:47,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:58:47,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:58:47,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:58:47,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:58:47,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:58:47,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:58:47,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:58:47,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:58:47,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:58:47,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:58:47,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:58:47,300 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 01:58:47,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:58:47,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:58:47,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:58:47,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:58:47,329 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:58:47,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:58:47,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:58:47,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:58:47,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:58:47,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:58:47,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:58:47,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:58:47,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:58:47,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:58:47,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:58:47,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:58:47,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:58:47,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:58:47,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:58:47,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:58:47,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:58:47,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:58:47,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:58:47,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:58:47,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:58:47,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:58:47,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:58:47,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:58:47,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:58:47,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:58:47,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:58:47,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:58:47,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:58:47,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:58:47,821 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:58:47,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-27 01:58:47,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a67a36f6/072d32e444434e9fa5590e8b0ae14806/FLAG25b09a338 [2020-10-27 01:58:48,662 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:58:48,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-27 01:58:48,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a67a36f6/072d32e444434e9fa5590e8b0ae14806/FLAG25b09a338 [2020-10-27 01:58:49,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a67a36f6/072d32e444434e9fa5590e8b0ae14806 [2020-10-27 01:58:49,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:58:49,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:58:49,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:49,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:58:49,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:58:49,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cf01ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49, skipping insertion in model container [2020-10-27 01:58:49,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:58:49,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:58:49,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:49,234 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:58:49,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:49,269 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:58:49,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49 WrapperNode [2020-10-27 01:58:49,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:49,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:58:49,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:58:49,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:58:49,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (1/1) ... [2020-10-27 01:58:49,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:58:49,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:58:49,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:58:49,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:58:49,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (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 01:58:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:58:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:58:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:58:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:58:49,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:58:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:58:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:58:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:58:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:58:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:58:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:58:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:58:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:58:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:58:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:58:49,911 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:58:49,911 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:58:49,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:49 BoogieIcfgContainer [2020-10-27 01:58:49,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:58:49,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:58:49,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:58:49,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:58:49,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:58:49" (1/3) ... [2020-10-27 01:58:49,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef5a5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:49, skipping insertion in model container [2020-10-27 01:58:49,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:49" (2/3) ... [2020-10-27 01:58:49,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef5a5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:49, skipping insertion in model container [2020-10-27 01:58:49,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:49" (3/3) ... [2020-10-27 01:58:49,931 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-27 01:58:49,946 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:58:49,951 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:58:49,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:58:50,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:58:50,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:58:50,022 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:58:50,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:58:50,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:58:50,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:58:50,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:58:50,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:58:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:58:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:58:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:50,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:50,060 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash 734717802, now seen corresponding path program 1 times [2020-10-27 01:58:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947140516] [2020-10-27 01:58:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:50,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:58:50,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-27 01:58:50,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:50,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:50,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:58:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:50,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:50,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:50,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:50,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:58:50,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:50,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:50,787 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 01:58:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947140516] [2020-10-27 01:58:50,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:50,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:58:50,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971259442] [2020-10-27 01:58:50,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:50,814 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-27 01:58:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:51,094 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-27 01:58:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:51,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 01:58:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:51,104 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:58:51,105 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:58:51,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:58:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:58:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:58:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 01:58:51,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-27 01:58:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:51,156 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 01:58:51,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 01:58:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:58:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:51,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:51,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:58:51,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -569959400, now seen corresponding path program 1 times [2020-10-27 01:58:51,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:51,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530797800] [2020-10-27 01:58:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:51,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:51,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:58:51,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:51,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-27 01:58:51,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:51,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:58:51,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:51,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:51,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:51,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:51,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:58:51,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:51,790 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 01:58:51,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530797800] [2020-10-27 01:58:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320951973] [2020-10-27 01:58:51,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:51,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:51,802 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-27 01:58:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:52,190 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-27 01:58:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:52,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-27 01:58:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:52,194 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:58:52,194 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:58:52,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:58:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:58:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-27 01:58:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:58:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 01:58:52,206 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-27 01:58:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:52,206 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 01:58:52,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 01:58:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:58:52,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:52,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:52,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:58:52,208 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2009440877, now seen corresponding path program 2 times [2020-10-27 01:58:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555644329] [2020-10-27 01:58:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:58:52,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:58:52,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:58:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:58:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:52,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:52,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:52,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:52,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555644329] [2020-10-27 01:58:52,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:52,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:52,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526199550] [2020-10-27 01:58:52,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:52,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:52,621 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 11 states. [2020-10-27 01:58:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:53,044 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 01:58:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:53,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-27 01:58:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:53,046 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:58:53,046 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:58:53,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:58:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:58:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-27 01:58:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:58:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 01:58:53,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-27 01:58:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:53,054 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 01:58:53,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 01:58:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:58:53,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:53,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:53,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:58:53,056 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1892499409, now seen corresponding path program 1 times [2020-10-27 01:58:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:53,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001736549] [2020-10-27 01:58:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:58:53,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 01:58:53,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:53,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:58:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:53,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:53,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:53,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001736549] [2020-10-27 01:58:53,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:53,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:58:53,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708458565] [2020-10-27 01:58:53,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:53,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:53,179 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-27 01:58:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:53,312 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-27 01:58:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:58:53,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:58:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:53,314 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:58:53,314 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:58:53,314 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 01:58:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:58:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:58:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:58:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 01:58:53,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-27 01:58:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:53,321 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 01:58:53,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 01:58:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:58:53,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:53,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:53,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:58:53,323 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1681738700, now seen corresponding path program 2 times [2020-10-27 01:58:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623046635] [2020-10-27 01:58:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:58:53,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:58:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:53,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:53,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:53,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:53,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623046635] [2020-10-27 01:58:53,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:53,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:58:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496077059] [2020-10-27 01:58:53,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:58:53,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:58:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:53,577 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-27 01:58:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:53,842 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-27 01:58:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:58:53,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 01:58:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:53,843 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:58:53,843 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:58:53,844 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 01:58:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:58:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 01:58:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:58:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 01:58:53,852 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-27 01:58:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:53,852 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 01:58:53,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:58:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 01:58:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:58:53,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:53,854 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:53,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:58:53,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash -931077561, now seen corresponding path program 3 times [2020-10-27 01:58:53,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:53,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176456978] [2020-10-27 01:58:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:53,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:58:53,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 01:58:53,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:58:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:54,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176456978] [2020-10-27 01:58:54,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:54,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199299590] [2020-10-27 01:58:54,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:54,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:54,104 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-27 01:58:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:54,475 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-27 01:58:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:54,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 01:58:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:54,477 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:58:54,477 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:58:54,478 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 01:58:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:58:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 01:58:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:58:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 01:58:54,487 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 01:58:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:54,488 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 01:58:54,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 01:58:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:58:54,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:54,489 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:54,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:58:54,503 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1680948414, now seen corresponding path program 4 times [2020-10-27 01:58:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:54,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302535971] [2020-10-27 01:58:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:58:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:58:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:54,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:54,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302535971] [2020-10-27 01:58:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:58:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126207326] [2020-10-27 01:58:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:58:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:58:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:58:54,931 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-27 01:58:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:55,451 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-27 01:58:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:58:55,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:58:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:55,452 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:58:55,452 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:58:55,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:58:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:58:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 01:58:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:58:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 01:58:55,467 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-27 01:58:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:55,471 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 01:58:55,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:58:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 01:58:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:58:55,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:55,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:55,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:58:55,473 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1660792509, now seen corresponding path program 5 times [2020-10-27 01:58:55,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:55,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188591259] [2020-10-27 01:58:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:58:55,502 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:58:55,502 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:58:55,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:58:55,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:58:55 BoogieIcfgContainer [2020-10-27 01:58:55,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:58:55,531 INFO L168 Benchmark]: Toolchain (without parser) took 6512.55 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.0 MB in the beginning and 182.6 MB in the end (delta: -55.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:55,536 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:58:55,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.95 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:55,539 INFO L168 Benchmark]: Boogie Preprocessor took 38.30 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:55,540 INFO L168 Benchmark]: RCFGBuilder took 605.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 102.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:55,540 INFO L168 Benchmark]: TraceAbstraction took 5608.17 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.2 MB in the beginning and 182.6 MB in the end (delta: -80.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:58:55,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 151.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.95 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.30 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 605.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 102.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5608.17 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.2 MB in the beginning and 182.6 MB in the end (delta: -80.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i