/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:04:40,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:04:40,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:04:40,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:04:40,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:04:40,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:04:40,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:04:40,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:04:40,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:04:40,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:04:40,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:04:40,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:04:40,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:04:40,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:04:40,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:04:40,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:04:40,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:04:40,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:04:40,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:04:40,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:04:40,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:04:40,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:04:40,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:04:40,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:04:40,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:04:40,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:04:40,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:04:40,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:04:40,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:04:40,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:04:40,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:04:40,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:04:40,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:04:40,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:04:40,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:04:40,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:04:40,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:04:40,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:04:40,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:04:40,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:04:40,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:04:40,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 00:04:40,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:04:40,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:04:40,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:04:40,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:04:40,304 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:04:40,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:04:40,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:04:40,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:04:40,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:04:40,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:04:40,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:04:40,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:04:40,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:04:40,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:04:40,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:04:40,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:04:40,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:04:40,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:04:40,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:04:40,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:04:40,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:04:40,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:40,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:04:40,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:04:40,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:04:40,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:04:40,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:04:40,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:04:40,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:04:40,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-25 00:04:40,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:04:40,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:04:40,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:04:40,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:04:40,802 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:04:40,803 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-25 00:04:40,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6057964a/3ee63731b59143caaaaaa91ae45079d1/FLAG6453ae275 [2020-09-25 00:04:41,482 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:41,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-25 00:04:41,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6057964a/3ee63731b59143caaaaaa91ae45079d1/FLAG6453ae275 [2020-09-25 00:04:41,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6057964a/3ee63731b59143caaaaaa91ae45079d1 [2020-09-25 00:04:41,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:41,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:41,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:41,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:41,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:41,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:41" (1/1) ... [2020-09-25 00:04:41,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:41, skipping insertion in model container [2020-09-25 00:04:41,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:41" (1/1) ... [2020-09-25 00:04:41,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:41,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:42,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:42,089 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:42,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:42,141 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:42,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42 WrapperNode [2020-09-25 00:04:42,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:42,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:42,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:42,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:42,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... [2020-09-25 00:04:42,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:42,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:42,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:42,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:42,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:42,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:04:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:04:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:04:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 00:04:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:04:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:04:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:04:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:04:42,755 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:42,755 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:04:42,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:42 BoogieIcfgContainer [2020-09-25 00:04:42,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:42,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:42,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:42,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:42,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:41" (1/3) ... [2020-09-25 00:04:42,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d92aaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:42, skipping insertion in model container [2020-09-25 00:04:42,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:42" (2/3) ... [2020-09-25 00:04:42,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d92aaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:42, skipping insertion in model container [2020-09-25 00:04:42,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:42" (3/3) ... [2020-09-25 00:04:42,772 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-09-25 00:04:42,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:42,794 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:42,815 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:42,849 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:42,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:42,849 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:42,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:42,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:42,849 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:42,850 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:42,850 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-25 00:04:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 00:04:42,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:42,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:42,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1727331883, now seen corresponding path program 1 times [2020-09-25 00:04:42,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:42,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608592228] [2020-09-25 00:04:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:43,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:43,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 00:04:44,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:44,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-09-25 00:04:44,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 00:04:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 00:04:44,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:04:44,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:44,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:44,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:44,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:04:44,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:44,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 00:04:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:44,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:44,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:44,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:04:44,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:04:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:44,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-25 00:04:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:44,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 00:04:44,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:04:44,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:44,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:04:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-09-25 00:04:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 00:04:44,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608592228] [2020-09-25 00:04:44,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:44,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 00:04:44,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493351097] [2020-09-25 00:04:44,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:04:44,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:04:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:04:44,408 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 9 states. [2020-09-25 00:04:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:44,869 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-09-25 00:04:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:04:44,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-25 00:04:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:44,886 INFO L225 Difference]: With dead ends: 137 [2020-09-25 00:04:44,886 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 00:04:44,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:04:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 00:04:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-09-25 00:04:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 00:04:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 00:04:44,959 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 30 [2020-09-25 00:04:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:44,960 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 00:04:44,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:04:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 00:04:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 00:04:44,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:44,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:44,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:44,967 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1086220015, now seen corresponding path program 1 times [2020-09-25 00:04:44,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:44,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257700986] [2020-09-25 00:04:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:45,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:45,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 00:04:45,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 00:04:45,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 00:04:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 00:04:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:45,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:45,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:45,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:45,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 00:04:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:45,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:45,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:45,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 00:04:45,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:04:45,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-25 00:04:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:45,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:45,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:45,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:04:45,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:45,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:45,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:45,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:04:45,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 00:04:45,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257700986] [2020-09-25 00:04:45,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:45,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:04:45,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112246997] [2020-09-25 00:04:45,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:04:45,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:04:45,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:45,257 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2020-09-25 00:04:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:45,412 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-25 00:04:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:04:45,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-25 00:04:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:45,415 INFO L225 Difference]: With dead ends: 91 [2020-09-25 00:04:45,416 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 00:04:45,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 00:04:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-09-25 00:04:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 00:04:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-25 00:04:45,430 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2020-09-25 00:04:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:45,431 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-25 00:04:45,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:04:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-25 00:04:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 00:04:45,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:45,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:45,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:45,436 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1811286385, now seen corresponding path program 1 times [2020-09-25 00:04:45,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:45,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069593648] [2020-09-25 00:04:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:45,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:04:50,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:04:50,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 00:04:50,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:04:50,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 00:04:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:04:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:50,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:50,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:50,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:50,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:50,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:50,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 00:04:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:50,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:50,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:04:50,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-25 00:04:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:50,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 00:04:50,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:04:50,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:50,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-25 00:04:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:50,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 00:04:50,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:50,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:04:50,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 00:04:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:04:50,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:04:50,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:50,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:04:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 00:04:50,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069593648] [2020-09-25 00:04:50,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:50,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:04:50,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733010047] [2020-09-25 00:04:50,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:04:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:04:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:04:50,999 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 13 states. [2020-09-25 00:04:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:51,896 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-09-25 00:04:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 00:04:51,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-25 00:04:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:51,898 INFO L225 Difference]: With dead ends: 84 [2020-09-25 00:04:51,898 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 00:04:51,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:04:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 00:04:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-09-25 00:04:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 00:04:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-25 00:04:51,919 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-09-25 00:04:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:51,919 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-25 00:04:51,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:04:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-25 00:04:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 00:04:51,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:51,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:51,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:51,922 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2082234165, now seen corresponding path program 1 times [2020-09-25 00:04:51,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:51,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816319795] [2020-09-25 00:04:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:53,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:54,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:54,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 00:04:54,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:54,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-09-25 00:04:54,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:04:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 00:04:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 00:04:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:55,608 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-09-25 00:05:02,849 WARN L193 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-09-25 00:05:16,210 WARN L193 SmtUtils]: Spent 13.29 s on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2020-09-25 00:05:32,159 WARN L193 SmtUtils]: Spent 15.87 s on a formula simplification. DAG size of input: 256 DAG size of output: 102 [2020-09-25 00:05:45,253 WARN L193 SmtUtils]: Spent 13.01 s on a formula simplification. DAG size of input: 129 DAG size of output: 93