/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:09:15,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:09:15,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:09:15,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:09:15,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:09:15,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:09:15,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:09:15,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:09:15,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:09:15,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:09:15,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:09:15,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:09:15,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:09:15,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:09:15,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:09:15,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:09:15,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:09:15,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:09:15,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:09:15,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:09:15,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:09:15,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:09:15,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:09:15,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:09:15,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:09:15,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:09:15,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:09:15,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:09:15,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:09:15,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:09:15,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:09:15,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:09:15,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:09:15,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:09:15,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:09:15,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:09:15,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:09:15,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:09:15,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:09:15,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:09:15,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:09:15,203 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 10:09:15,229 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:09:15,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:09:15,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:09:15,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:09:15,231 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:09:15,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:09:15,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:09:15,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:09:15,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:09:15,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:09:15,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:09:15,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:09:15,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:09:15,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:09:15,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:09:15,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:09:15,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:09:15,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:09:15,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:09:15,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:09:15,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:09:15,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:09:15,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:09:15,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:09:15,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:09:15,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:09:15,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:09:15,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:09:15,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:09:15,236 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:09:15,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:09:15,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:09:15,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:09:15,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:09:15,752 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:09:15,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 10:09:15,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c3906496/96a7222cee8f4463ba742a8cdb039557/FLAGa656b945f [2020-09-25 10:09:16,457 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:09:16,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label28.c [2020-09-25 10:09:16,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c3906496/96a7222cee8f4463ba742a8cdb039557/FLAGa656b945f [2020-09-25 10:09:16,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c3906496/96a7222cee8f4463ba742a8cdb039557 [2020-09-25 10:09:16,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:09:16,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:09:16,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:09:16,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:09:16,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:09:16,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:09:16" (1/1) ... [2020-09-25 10:09:16,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c28f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:16, skipping insertion in model container [2020-09-25 10:09:16,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:09:16" (1/1) ... [2020-09-25 10:09:16,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:09:16,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:09:17,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:09:17,428 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:09:17,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:09:17,571 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:09:17,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17 WrapperNode [2020-09-25 10:09:17,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:09:17,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:09:17,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:09:17,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:09:17,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (1/1) ... [2020-09-25 10:09:17,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:09:17,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:09:17,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:09:17,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:09:17,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (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 10:09:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:09:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:09:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:09:17,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:09:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:09:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:09:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:09:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:09:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:09:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:09:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:09:19,185 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:09:19,186 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:09:19,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:09:19 BoogieIcfgContainer [2020-09-25 10:09:19,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:09:19,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:09:19,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:09:19,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:09:19,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:09:16" (1/3) ... [2020-09-25 10:09:19,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f2b93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:09:19, skipping insertion in model container [2020-09-25 10:09:19,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:17" (2/3) ... [2020-09-25 10:09:19,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f2b93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:09:19, skipping insertion in model container [2020-09-25 10:09:19,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:09:19" (3/3) ... [2020-09-25 10:09:19,209 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label28.c [2020-09-25 10:09:19,221 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:09:19,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:09:19,255 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:09:19,288 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:09:19,288 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:09:19,288 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:09:19,289 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:09:19,289 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:09:19,289 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:09:19,289 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:09:19,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:09:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 10:09:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-25 10:09:19,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:19,347 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:09:19,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1105966209, now seen corresponding path program 1 times [2020-09-25 10:09:19,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:19,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363243105] [2020-09-25 10:09:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:19,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:20,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:21,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:22,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:23,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:24,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-25 10:09:24,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:09:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 10:09:24,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:24,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:24,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:09:24,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:09:24,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 10:09:24,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 10:09:24,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:09:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:24,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:24,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:24,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:09:24,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:09:24,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:09:24,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:24,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:09:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 10:09:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:09:24,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363243105] [2020-09-25 10:09:24,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:09:24,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:09:24,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270453856] [2020-09-25 10:09:24,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:09:24,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:09:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:09:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:09:24,965 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 10:09:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:09:27,180 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 10:09:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:09:27,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-09-25 10:09:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:09:27,208 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 10:09:27,208 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 10:09:27,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:09:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 10:09:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 10:09:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 10:09:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 10:09:27,328 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 150 [2020-09-25 10:09:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:09:27,330 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 10:09:27,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:09:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 10:09:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-25 10:09:27,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:27,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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 10:09:27,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:09:27,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 93952890, now seen corresponding path program 1 times [2020-09-25 10:09:27,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:27,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188079040] [2020-09-25 10:09:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:27,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:27,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:29,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:32,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:32,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 10:09:32,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:09:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 10:09:32,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:32,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:32,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:09:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:09:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-09-25 10:09:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:32,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:09:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:32,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:32,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:32,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:09:32,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:09:32,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 10:09:32,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:32,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:09:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:09:32,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:09:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:32,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:32,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:09:32,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:09:32,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 10:09:32,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:32,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:09:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:09:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 10:09:32,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 10:09:32,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188079040] [2020-09-25 10:09:32,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:09:32,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:09:32,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989659133] [2020-09-25 10:09:32,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:09:32,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:09:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:09:32,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:09:32,771 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 7 states. [2020-09-25 10:09:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:09:34,502 INFO L93 Difference]: Finished difference Result 1557 states and 1889 transitions. [2020-09-25 10:09:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 10:09:34,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-09-25 10:09:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:09:34,511 INFO L225 Difference]: With dead ends: 1557 [2020-09-25 10:09:34,512 INFO L226 Difference]: Without dead ends: 958 [2020-09-25 10:09:34,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:09:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-09-25 10:09:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 774. [2020-09-25 10:09:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-09-25 10:09:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 956 transitions. [2020-09-25 10:09:34,567 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 956 transitions. Word has length 167 [2020-09-25 10:09:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:09:34,568 INFO L479 AbstractCegarLoop]: Abstraction has 774 states and 956 transitions. [2020-09-25 10:09:34,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:09:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 956 transitions. [2020-09-25 10:09:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 10:09:34,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:34,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:09:34,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:09:34,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash -513304486, now seen corresponding path program 1 times [2020-09-25 10:09:34,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:34,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803151234] [2020-09-25 10:09:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:35,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:39,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:39,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-25 10:09:39,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:09:39,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 10:09:39,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:39,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:09:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:09:39,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-09-25 10:09:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:39,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:09:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:39,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:39,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:39,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:09:39,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:09:39,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 10:09:39,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:39,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:39,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:09:39,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:39,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:09:39,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:39,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:09:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:39,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:39,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:39,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 10:09:39,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:09:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 10:09:39,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:39,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:09:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:39,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:09:39,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:09:40,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803151234] [2020-09-25 10:09:40,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:09:40,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:09:40,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922201978] [2020-09-25 10:09:40,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:09:40,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:09:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:09:40,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:09:40,270 INFO L87 Difference]: Start difference. First operand 774 states and 956 transitions. Second operand 11 states. [2020-09-25 10:09:43,917 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-09-25 10:09:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:09:44,857 INFO L93 Difference]: Finished difference Result 1982 states and 2606 transitions. [2020-09-25 10:09:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:09:44,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 176 [2020-09-25 10:09:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:09:44,865 INFO L225 Difference]: With dead ends: 1982 [2020-09-25 10:09:44,865 INFO L226 Difference]: Without dead ends: 1097 [2020-09-25 10:09:44,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:09:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2020-09-25 10:09:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1073. [2020-09-25 10:09:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2020-09-25 10:09:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1277 transitions. [2020-09-25 10:09:44,908 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1277 transitions. Word has length 176 [2020-09-25 10:09:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:09:44,908 INFO L479 AbstractCegarLoop]: Abstraction has 1073 states and 1277 transitions. [2020-09-25 10:09:44,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:09:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1277 transitions. [2020-09-25 10:09:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 10:09:44,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:44,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:09:44,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:09:44,915 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1954637387, now seen corresponding path program 1 times [2020-09-25 10:09:44,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:44,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551315334] [2020-09-25 10:09:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:44,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:45,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:45,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:49,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:49,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-09-25 10:09:49,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:09:49,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 10:09:49,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:49,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:09:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:09:49,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-09-25 10:09:49,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:09:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:50,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:50,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:09:50,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:09:50,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:09:50,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:50,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:09:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:09:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:50,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:09:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:50,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:50,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:50,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:09:50,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:09:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 10:09:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:50,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:09:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 10:09:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:50,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:09:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:50,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:09:50,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:09:50,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:09:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-09-25 10:09:50,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:09:50,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:09:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:09:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:09:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:09:50,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:09:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 10:09:50,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551315334] [2020-09-25 10:09:50,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:09:50,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:09:50,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192773472] [2020-09-25 10:09:50,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:09:50,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:09:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:09:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:09:50,606 INFO L87 Difference]: Start difference. First operand 1073 states and 1277 transitions. Second operand 12 states. [2020-09-25 10:09:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:09:54,974 INFO L93 Difference]: Finished difference Result 2535 states and 3135 transitions. [2020-09-25 10:09:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:09:54,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 201 [2020-09-25 10:09:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:09:54,984 INFO L225 Difference]: With dead ends: 2535 [2020-09-25 10:09:54,984 INFO L226 Difference]: Without dead ends: 1208 [2020-09-25 10:09:54,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:09:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-09-25 10:09:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 896. [2020-09-25 10:09:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-09-25 10:09:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1008 transitions. [2020-09-25 10:09:55,022 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1008 transitions. Word has length 201 [2020-09-25 10:09:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:09:55,022 INFO L479 AbstractCegarLoop]: Abstraction has 896 states and 1008 transitions. [2020-09-25 10:09:55,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:09:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1008 transitions. [2020-09-25 10:09:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-25 10:09:55,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:09:55,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1] [2020-09-25 10:09:55,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:09:55,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:09:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:09:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1990225871, now seen corresponding path program 1 times [2020-09-25 10:09:55,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:09:55,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140539962] [2020-09-25 10:09:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:09:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:09:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:55,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:58,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:58,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:09:58,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:00,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:00,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-09-25 10:10:00,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:10:00,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 10:10:00,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:00,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:10:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-09-25 10:10:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 10:10:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:10:00,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:10:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:10:00,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:10:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:10:00,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:00,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:10:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:10:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:10:00,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:10:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:10:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:00,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:00,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:10:00,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:10:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:10:00,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:10:00,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:10:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:00,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:00,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 10:10:00,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:10:00,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 10:10:00,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:00,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:10:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:10:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 10:10:00,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:10:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 10:10:00,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140539962] [2020-09-25 10:10:00,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:10:00,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:10:00,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511499750] [2020-09-25 10:10:00,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:10:00,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:10:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:10:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:10:00,348 INFO L87 Difference]: Start difference. First operand 896 states and 1008 transitions. Second operand 5 states. [2020-09-25 10:10:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:10:02,546 INFO L93 Difference]: Finished difference Result 2474 states and 2853 transitions. [2020-09-25 10:10:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:10:02,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-09-25 10:10:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:10:02,555 INFO L225 Difference]: With dead ends: 2474 [2020-09-25 10:10:02,555 INFO L226 Difference]: Without dead ends: 1425 [2020-09-25 10:10:02,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:10:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2020-09-25 10:10:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1348. [2020-09-25 10:10:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2020-09-25 10:10:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1546 transitions. [2020-09-25 10:10:02,603 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1546 transitions. Word has length 207 [2020-09-25 10:10:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:10:02,604 INFO L479 AbstractCegarLoop]: Abstraction has 1348 states and 1546 transitions. [2020-09-25 10:10:02,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:10:02,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1546 transitions. [2020-09-25 10:10:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-25 10:10:02,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:10:02,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 10:10:02,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:10:02,612 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:10:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:10:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash -384198663, now seen corresponding path program 1 times [2020-09-25 10:10:02,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:10:02,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890314544] [2020-09-25 10:10:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:10:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:02,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:03,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking...