/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=SMALLEST --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/Problem01_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:19:58,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:19:58,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:19:58,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:19:58,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:19:58,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:19:58,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:19:58,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:19:58,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:19:58,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:19:58,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:19:58,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:19:58,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:19:58,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:19:58,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:19:58,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:19:58,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:19:58,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:19:58,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:19:58,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:19:58,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:19:58,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:19:58,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:19:58,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:19:58,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:19:58,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:19:58,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:19:58,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:19:58,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:19:58,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:19:58,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:19:58,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:19:58,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:19:58,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:19:58,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:19:58,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:19:58,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:19:58,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:19:58,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:19:58,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:19:58,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:19:58,176 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 [2020-09-24 18:19:58,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:19:58,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:19:58,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:19:58,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:19:58,228 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:19:58,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:19:58,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:19:58,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:19:58,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:19:58,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:19:58,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:19:58,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:19:58,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:19:58,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:19:58,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:19:58,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:19:58,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:19:58,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:19:58,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:19:58,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:19:58,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:19:58,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:19:58,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:19:58,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:19:58,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:19:58,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:19:58,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:19:58,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:19:58,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:19:58,234 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:19:58,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:19:58,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:19:58,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:19:58,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:19:58,725 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:19:58,726 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-24 18:19:58,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639630d22/256836d0059240e89903ceeebd5dd5ef/FLAG528b4a5b1 [2020-09-24 18:19:59,451 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:19:59,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-24 18:19:59,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639630d22/256836d0059240e89903ceeebd5dd5ef/FLAG528b4a5b1 [2020-09-24 18:19:59,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639630d22/256836d0059240e89903ceeebd5dd5ef [2020-09-24 18:19:59,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:19:59,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:19:59,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:19:59,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:19:59,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:19:59,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:19:59" (1/1) ... [2020-09-24 18:19:59,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:19:59, skipping insertion in model container [2020-09-24 18:19:59,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:19:59" (1/1) ... [2020-09-24 18:19:59,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:19:59,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:20:00,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:00,287 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:20:00,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:20:00,541 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:20:00,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00 WrapperNode [2020-09-24 18:20:00,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:20:00,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:20:00,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:20:00,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:20:00,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (1/1) ... [2020-09-24 18:20:00,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:20:00,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:20:00,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:20:00,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:20:00,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (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 [2020-09-24 18:20:00,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:20:00,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:20:00,760 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:20:00,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:20:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:20:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:20:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:20:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:20:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:20:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:20:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:20:02,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:20:02,104 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:20:02,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:02 BoogieIcfgContainer [2020-09-24 18:20:02,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:20:02,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:20:02,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:20:02,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:20:02,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:19:59" (1/3) ... [2020-09-24 18:20:02,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:02, skipping insertion in model container [2020-09-24 18:20:02,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:20:00" (2/3) ... [2020-09-24 18:20:02,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:20:02, skipping insertion in model container [2020-09-24 18:20:02,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:20:02" (3/3) ... [2020-09-24 18:20:02,128 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label35.c [2020-09-24 18:20:02,141 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:20:02,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:20:02,180 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:20:02,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:20:02,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:20:02,216 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:20:02,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:20:02,217 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:20:02,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:20:02,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:20:02,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:20:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 18:20:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 18:20:02,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:02,271 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] [2020-09-24 18:20:02,271 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash -850053121, now seen corresponding path program 1 times [2020-09-24 18:20:02,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:02,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 18:20:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:03,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:03,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:04,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:07,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:07,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-24 18:20:07,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:20:07,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 18:20:07,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:07,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:20:07,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:20:07,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 18:20:07,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:20:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:07,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:07,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:07,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:07,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 18:20:07,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:20:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:07,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 18:20:07,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:20:07,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:20:07,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217714628] [2020-09-24 18:20:07,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:20:07,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:07,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:20:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:07,871 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-24 18:20:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:10,675 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-24 18:20:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:20:10,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-09-24 18:20:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:10,707 INFO L225 Difference]: With dead ends: 1360 [2020-09-24 18:20:10,707 INFO L226 Difference]: Without dead ends: 781 [2020-09-24 18:20:10,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:20:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-24 18:20:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-24 18:20:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-24 18:20:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-24 18:20:10,855 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 108 [2020-09-24 18:20:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:10,856 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-24 18:20:10,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:20:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-24 18:20:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 18:20:10,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:10,867 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:20:10,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:20:10,868 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1639648560, now seen corresponding path program 1 times [2020-09-24 18:20:10,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:10,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484829399] [2020-09-24 18:20:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:12,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:12,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 18:20:12,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:20:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-09-24 18:20:12,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:20:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 18:20:12,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:20:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:12,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:12,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:12,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:12,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:20:12,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:12,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:12,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:20:12,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 18:20:12,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:20:12,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 18:20:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:12,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484829399] [2020-09-24 18:20:12,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:12,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:20:12,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260064875] [2020-09-24 18:20:12,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:20:12,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:20:12,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:20:12,690 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 5 states. [2020-09-24 18:20:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:14,985 INFO L93 Difference]: Finished difference Result 1928 states and 2459 transitions. [2020-09-24 18:20:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:20:14,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-09-24 18:20:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:14,997 INFO L225 Difference]: With dead ends: 1928 [2020-09-24 18:20:14,997 INFO L226 Difference]: Without dead ends: 1206 [2020-09-24 18:20:15,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:20:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2020-09-24 18:20:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1036. [2020-09-24 18:20:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-09-24 18:20:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1250 transitions. [2020-09-24 18:20:15,052 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1250 transitions. Word has length 129 [2020-09-24 18:20:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:15,053 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1250 transitions. [2020-09-24 18:20:15,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:20:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1250 transitions. [2020-09-24 18:20:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 18:20:15,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:15,059 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:20:15,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:20:15,060 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1999519641, now seen corresponding path program 1 times [2020-09-24 18:20:15,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:15,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145916099] [2020-09-24 18:20:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:15,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:15,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:15,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:15,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:15,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:15,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:16,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:19,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:19,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 18:20:19,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:20:19,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4854 [2020-09-24 18:20:19,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:20:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:20:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:20:19,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:20,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:20,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:20,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:20,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 18:20:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:20:20,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:20,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:20,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:20,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:20:20,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:20,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-24 18:20:20,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:20:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:20:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:20:20,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145916099] [2020-09-24 18:20:20,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:20:20,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 18:20:20,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655332377] [2020-09-24 18:20:20,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:20:20,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:20:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:20:20,439 INFO L87 Difference]: Start difference. First operand 1036 states and 1250 transitions. Second operand 8 states. [2020-09-24 18:20:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:22,491 INFO L93 Difference]: Finished difference Result 2703 states and 3339 transitions. [2020-09-24 18:20:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:20:22,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-09-24 18:20:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:22,505 INFO L225 Difference]: With dead ends: 2703 [2020-09-24 18:20:22,506 INFO L226 Difference]: Without dead ends: 1527 [2020-09-24 18:20:22,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:20:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-09-24 18:20:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1324. [2020-09-24 18:20:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2020-09-24 18:20:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1558 transitions. [2020-09-24 18:20:22,594 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1558 transitions. Word has length 133 [2020-09-24 18:20:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:22,596 INFO L479 AbstractCegarLoop]: Abstraction has 1324 states and 1558 transitions. [2020-09-24 18:20:22,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:20:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1558 transitions. [2020-09-24 18:20:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 18:20:22,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:22,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:20:22,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:20:22,641 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:22,642 INFO L82 PathProgramCache]: Analyzing trace with hash -247402504, now seen corresponding path program 1 times [2020-09-24 18:20:22,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:22,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477435784] [2020-09-24 18:20:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:23,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:27,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:27,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 18:20:27,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:20:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 18:20:27,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:20:27,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:20:27,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:27,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:27,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:27,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:20:27,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:27,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:27,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 18:20:27,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:20:27,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:20:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:20:27,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 18:20:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:27,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:27,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:27,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:20:28,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:28,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 18:20:28,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:20:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:20:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:20:28,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477435784] [2020-09-24 18:20:28,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:28,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:20:28,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039789514] [2020-09-24 18:20:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:20:28,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:20:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:20:28,085 INFO L87 Difference]: Start difference. First operand 1324 states and 1558 transitions. Second operand 7 states. [2020-09-24 18:20:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:31,453 INFO L93 Difference]: Finished difference Result 3852 states and 4896 transitions. [2020-09-24 18:20:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:20:31,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-09-24 18:20:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:31,469 INFO L225 Difference]: With dead ends: 3852 [2020-09-24 18:20:31,469 INFO L226 Difference]: Without dead ends: 2343 [2020-09-24 18:20:31,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:20:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-09-24 18:20:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2075. [2020-09-24 18:20:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2020-09-24 18:20:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2473 transitions. [2020-09-24 18:20:31,557 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2473 transitions. Word has length 154 [2020-09-24 18:20:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:31,557 INFO L479 AbstractCegarLoop]: Abstraction has 2075 states and 2473 transitions. [2020-09-24 18:20:31,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:20:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2473 transitions. [2020-09-24 18:20:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 18:20:31,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:31,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:20:31,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:20:31,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash -131458993, now seen corresponding path program 1 times [2020-09-24 18:20:31,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:31,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141454031] [2020-09-24 18:20:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:31,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:31,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:31,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:32,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:32,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:32,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:35,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:35,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:36,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-24 18:20:36,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 18:20:36,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:20:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:20:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-24 18:20:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 18:20:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:36,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:36,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:36,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:36,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:36,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 18:20:36,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:36,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:36,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:36,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:20:36,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:36,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 18:20:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:20:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:20:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:36,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 18:20:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:36,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:36,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:36,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:20:36,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:36,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 18:20:36,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:36,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:20:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:20:36,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:20:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:20:37,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141454031] [2020-09-24 18:20:37,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:37,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:20:37,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7471138] [2020-09-24 18:20:37,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:20:37,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:20:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:20:37,178 INFO L87 Difference]: Start difference. First operand 2075 states and 2473 transitions. Second operand 8 states. [2020-09-24 18:20:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:20:41,428 INFO L93 Difference]: Finished difference Result 5451 states and 7044 transitions. [2020-09-24 18:20:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 18:20:41,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 159 [2020-09-24 18:20:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:20:41,448 INFO L225 Difference]: With dead ends: 5451 [2020-09-24 18:20:41,449 INFO L226 Difference]: Without dead ends: 3154 [2020-09-24 18:20:41,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-24 18:20:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-09-24 18:20:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2735. [2020-09-24 18:20:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2735 states. [2020-09-24 18:20:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3103 transitions. [2020-09-24 18:20:41,552 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3103 transitions. Word has length 159 [2020-09-24 18:20:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:20:41,552 INFO L479 AbstractCegarLoop]: Abstraction has 2735 states and 3103 transitions. [2020-09-24 18:20:41,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:20:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3103 transitions. [2020-09-24 18:20:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-24 18:20:41,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:20:41,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:20:41,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:20:41,566 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:20:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:20:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1106704956, now seen corresponding path program 1 times [2020-09-24 18:20:41,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:20:41,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217398987] [2020-09-24 18:20:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:20:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:41,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:42,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:46,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 18:20:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:20:46,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:46,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:20:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:46,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:46,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:20:46,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:20:46,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:20:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:20:46,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:46,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 18:20:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:46,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:46,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:46,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:20:46,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:46,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 18:20:46,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:46,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:20:46,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:20:46,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:20:46,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 18:20:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:20:46,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:20:46,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:20:46,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:20:46,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:20:46,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 18:20:46,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:20:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:20:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:20:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:20:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:20:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:20:46,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217398987] [2020-09-24 18:20:47,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:20:47,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:20:47,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747509191] [2020-09-24 18:20:47,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:20:47,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:20:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:20:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:20:47,002 INFO L87 Difference]: Start difference. First operand 2735 states and 3103 transitions. Second operand 8 states.