/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=0.2 --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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:16:24,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:16:24,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:16:24,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:16:24,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:16:24,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:16:24,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:16:24,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:16:24,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:16:24,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:16:24,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:16:24,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:16:24,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:16:24,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:16:24,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:16:24,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:16:24,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:16:24,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:16:24,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:16:24,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:16:24,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:16:24,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:16:24,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:16:24,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:16:24,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:16:24,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:16:24,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:16:24,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:16:24,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:16:24,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:16:24,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:16:24,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:16:24,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:16:24,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:16:24,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:16:24,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:16:24,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:16:24,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:16:24,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:16:24,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:16:24,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:16:24,297 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 11:16:24,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:16:24,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:16:24,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:16:24,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:16:24,348 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:16:24,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:16:24,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:16:24,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:16:24,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:16:24,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:16:24,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:16:24,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:16:24,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:16:24,351 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:16:24,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:16:24,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:16:24,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:16:24,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:16:24,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:16:24,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:16:24,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:16:24,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:16:24,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:16:24,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:16:24,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:16:24,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:16:24,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:16:24,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:16:24,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:16:24,355 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:16:24,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:16:24,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:16:24,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:16:24,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:16:24,874 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:16:24,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-25 11:16:24,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be40fa5a/56979e27688c43cd8e9fb4dbf4fed316/FLAGed663800d [2020-09-25 11:16:25,651 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:16:25,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-25 11:16:25,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be40fa5a/56979e27688c43cd8e9fb4dbf4fed316/FLAGed663800d [2020-09-25 11:16:25,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be40fa5a/56979e27688c43cd8e9fb4dbf4fed316 [2020-09-25 11:16:25,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:16:25,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:16:25,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:25,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:16:25,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:16:25,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:25" (1/1) ... [2020-09-25 11:16:25,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713e8a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:25, skipping insertion in model container [2020-09-25 11:16:25,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:25" (1/1) ... [2020-09-25 11:16:25,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:16:26,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:16:26,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:26,679 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:16:26,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:26,783 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:16:26,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26 WrapperNode [2020-09-25 11:16:26,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:26,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:16:26,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:16:26,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:16:26,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (1/1) ... [2020-09-25 11:16:26,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:16:26,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:16:26,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:16:26,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:16:26,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (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 11:16:27,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:16:27,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:16:27,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:16:27,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:16:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:16:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:16:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:16:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:16:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:16:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:16:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:16:28,373 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:16:28,374 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:16:28,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:28 BoogieIcfgContainer [2020-09-25 11:16:28,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:16:28,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:16:28,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:16:28,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:16:28,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:16:25" (1/3) ... [2020-09-25 11:16:28,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685ebc69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:28, skipping insertion in model container [2020-09-25 11:16:28,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:26" (2/3) ... [2020-09-25 11:16:28,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685ebc69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:28, skipping insertion in model container [2020-09-25 11:16:28,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:28" (3/3) ... [2020-09-25 11:16:28,397 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2020-09-25 11:16:28,409 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:16:28,427 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:16:28,450 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:16:28,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:16:28,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:16:28,489 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:16:28,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:16:28,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:16:28,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:16:28,490 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:16:28,490 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:16:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:16:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 11:16:28,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:28,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:28,578 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1730766665, now seen corresponding path program 1 times [2020-09-25 11:16:28,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:28,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263718191] [2020-09-25 11:16:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:29,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:29,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:29,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:32,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:33,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:34,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:34,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 11:16:34,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 11:16:34,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:34,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:34,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:34,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 11:16:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 11:16:34,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 11:16:34,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:34,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:34,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:34,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:34,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 11:16:34,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:34,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:34,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:16:34,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:34,358 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 11:16:34,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263718191] [2020-09-25 11:16:34,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:16:34,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:16:34,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806365967] [2020-09-25 11:16:34,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:16:34,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:16:34,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:16:34,400 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:16:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:36,561 INFO L93 Difference]: Finished difference Result 1205 states and 1651 transitions. [2020-09-25 11:16:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:16:36,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-09-25 11:16:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:36,591 INFO L225 Difference]: With dead ends: 1205 [2020-09-25 11:16:36,591 INFO L226 Difference]: Without dead ends: 627 [2020-09-25 11:16:36,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 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 11:16:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-09-25 11:16:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-09-25 11:16:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-25 11:16:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 759 transitions. [2020-09-25 11:16:36,727 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 759 transitions. Word has length 160 [2020-09-25 11:16:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:36,728 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 759 transitions. [2020-09-25 11:16:36,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:16:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 759 transitions. [2020-09-25 11:16:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-09-25 11:16:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:36,735 INFO L422 BasicCegarLoop]: trace histogram [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, 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 11:16:36,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:16:36,736 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1421064700, now seen corresponding path program 1 times [2020-09-25 11:16:36,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:36,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693203793] [2020-09-25 11:16:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:36,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:36,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:41,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-09-25 11:16:41,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:41,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 11:16:41,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:41,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:41,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:41,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-09-25 11:16:41,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 11:16:41,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:41,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:41,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:41,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:16:41,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:41,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:41,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:42,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:42,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:16:42,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:42,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 11:16:42,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:42,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:42,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:16:42,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:16:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:16:42,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693203793] [2020-09-25 11:16:42,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:42,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:42,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362573034] [2020-09-25 11:16:42,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:42,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:42,102 INFO L87 Difference]: Start difference. First operand 613 states and 759 transitions. Second operand 5 states. [2020-09-25 11:16:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:44,454 INFO L93 Difference]: Finished difference Result 1592 states and 2044 transitions. [2020-09-25 11:16:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:44,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2020-09-25 11:16:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:44,478 INFO L225 Difference]: With dead ends: 1592 [2020-09-25 11:16:44,478 INFO L226 Difference]: Without dead ends: 1001 [2020-09-25 11:16:44,482 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 [2020-09-25 11:16:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-09-25 11:16:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 801. [2020-09-25 11:16:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-09-25 11:16:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 979 transitions. [2020-09-25 11:16:44,567 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 979 transitions. Word has length 194 [2020-09-25 11:16:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:44,569 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 979 transitions. [2020-09-25 11:16:44,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 979 transitions. [2020-09-25 11:16:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-25 11:16:44,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:44,575 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:44,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:16:44,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1129646447, now seen corresponding path program 1 times [2020-09-25 11:16:44,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:44,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384287302] [2020-09-25 11:16:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:47,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:49,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-09-25 11:16:49,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 11:16:49,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:49,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:49,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:49,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 11:16:49,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-09-25 11:16:49,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:49,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:49,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:49,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:49,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:16:49,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:49,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:49,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:49,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:49,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:49,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:16:49,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 11:16:49,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:49,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:16:49,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:16:50,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384287302] [2020-09-25 11:16:50,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:50,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:50,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82219262] [2020-09-25 11:16:50,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:50,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:50,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:50,014 INFO L87 Difference]: Start difference. First operand 801 states and 979 transitions. Second operand 5 states. [2020-09-25 11:16:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:52,299 INFO L93 Difference]: Finished difference Result 2092 states and 2652 transitions. [2020-09-25 11:16:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:52,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-09-25 11:16:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:52,313 INFO L225 Difference]: With dead ends: 2092 [2020-09-25 11:16:52,314 INFO L226 Difference]: Without dead ends: 1313 [2020-09-25 11:16:52,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 11:16:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-09-25 11:16:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1261. [2020-09-25 11:16:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2020-09-25 11:16:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1488 transitions. [2020-09-25 11:16:52,379 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1488 transitions. Word has length 198 [2020-09-25 11:16:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:52,380 INFO L479 AbstractCegarLoop]: Abstraction has 1261 states and 1488 transitions. [2020-09-25 11:16:52,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1488 transitions. [2020-09-25 11:16:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-25 11:16:52,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:52,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:52,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:16:52,388 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1023567609, now seen corresponding path program 1 times [2020-09-25 11:16:52,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:52,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337023668] [2020-09-25 11:16:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:52,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-09-25 11:16:57,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:57,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 11:16:57,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:57,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-09-25 11:16:57,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-09-25 11:16:57,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:57,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:57,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:16:57,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:57,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:57,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:57,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:57,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:16:57,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:57,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:57,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:16:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:16:57,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:57,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 11:16:57,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 11:16:57,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:57,852 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 11:16:57,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337023668] [2020-09-25 11:16:57,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:57,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:57,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295770019] [2020-09-25 11:16:57,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:57,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:57,856 INFO L87 Difference]: Start difference. First operand 1261 states and 1488 transitions. Second operand 5 states. [2020-09-25 11:16:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:59,845 INFO L93 Difference]: Finished difference Result 3265 states and 3951 transitions. [2020-09-25 11:16:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:59,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-09-25 11:16:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:59,856 INFO L225 Difference]: With dead ends: 3265 [2020-09-25 11:16:59,856 INFO L226 Difference]: Without dead ends: 1328 [2020-09-25 11:16:59,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 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 11:16:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-09-25 11:16:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1318. [2020-09-25 11:16:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-09-25 11:16:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1508 transitions. [2020-09-25 11:16:59,913 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1508 transitions. Word has length 217 [2020-09-25 11:16:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:59,913 INFO L479 AbstractCegarLoop]: Abstraction has 1318 states and 1508 transitions. [2020-09-25 11:16:59,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1508 transitions. [2020-09-25 11:16:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-09-25 11:16:59,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:59,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:16:59,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:16:59,922 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash 380278058, now seen corresponding path program 1 times [2020-09-25 11:16:59,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:59,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819909140] [2020-09-25 11:16:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:59,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:00,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:17:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:17:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-25 11:17:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:05,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:05,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:05,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:05,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:17:05,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:05,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:05,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:17:05,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:17:05,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:05,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 11:17:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:05,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:05,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:17:05,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 11:17:05,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:05,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:17:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:17:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:17:06,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819909140] [2020-09-25 11:17:06,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:06,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:17:06,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872780601] [2020-09-25 11:17:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:17:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:17:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:17:06,168 INFO L87 Difference]: Start difference. First operand 1318 states and 1508 transitions. Second operand 12 states. [2020-09-25 11:17:06,761 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-09-25 11:17:08,070 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-09-25 11:17:10,287 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-09-25 11:17:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:11,095 INFO L93 Difference]: Finished difference Result 3554 states and 4257 transitions. [2020-09-25 11:17:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:17:11,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 224 [2020-09-25 11:17:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:11,108 INFO L225 Difference]: With dead ends: 3554 [2020-09-25 11:17:11,108 INFO L226 Difference]: Without dead ends: 1990 [2020-09-25 11:17:11,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2020-09-25 11:17:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2020-09-25 11:17:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1980. [2020-09-25 11:17:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-09-25 11:17:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2251 transitions. [2020-09-25 11:17:11,187 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2251 transitions. Word has length 224 [2020-09-25 11:17:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:11,188 INFO L479 AbstractCegarLoop]: Abstraction has 1980 states and 2251 transitions. [2020-09-25 11:17:11,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:17:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2251 transitions. [2020-09-25 11:17:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-09-25 11:17:11,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:11,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 11:17:11,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:17:11,200 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash 823079090, now seen corresponding path program 1 times [2020-09-25 11:17:11,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:11,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119261028] [2020-09-25 11:17:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:11,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking...