/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:04:11,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:04:11,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:04:11,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:04:11,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:04:11,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:04:11,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:04:11,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:04:11,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:04:11,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:04:11,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:04:11,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:04:11,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:04:11,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:04:11,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:04:11,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:04:11,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:04:11,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:04:11,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:04:11,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:04:11,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:04:11,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:04:11,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:04:11,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:04:11,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:04:11,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:04:11,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:04:11,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:04:11,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:04:11,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:04:11,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:04:11,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:04:11,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:04:11,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:04:11,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:04:11,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:04:11,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:04:11,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:04:11,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:04:11,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:04:11,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:04:11,874 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 09:04:11,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:04:11,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:04:11,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:04:11,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:04:11,918 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:04:11,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:04:11,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:04:11,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:04:11,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:04:11,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:04:11,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:04:11,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:04:11,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:04:11,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:04:11,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:04:11,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:04:11,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:04:11,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:04:11,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:04:11,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:04:11,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:04:11,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:04:11,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:04:11,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:04:11,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:04:11,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:04:11,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:04:11,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:04:11,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:04:11,924 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:04:12,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:04:12,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:04:12,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:04:12,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:04:12,401 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:04:12,402 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2020-09-25 09:04:12,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789fc88eb/d5cce9fd41b84088851137d655a8950c/FLAGf938cca66 [2020-09-25 09:04:13,167 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:04:13,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2020-09-25 09:04:13,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789fc88eb/d5cce9fd41b84088851137d655a8950c/FLAGf938cca66 [2020-09-25 09:04:13,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/789fc88eb/d5cce9fd41b84088851137d655a8950c [2020-09-25 09:04:13,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:04:13,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:04:13,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:04:13,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:04:13,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:04:13,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:04:13" (1/1) ... [2020-09-25 09:04:13,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf0d2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:13, skipping insertion in model container [2020-09-25 09:04:13,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:04:13" (1/1) ... [2020-09-25 09:04:13,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:04:13,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:04:13,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:04:13,947 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:04:14,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:04:14,239 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:04:14,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14 WrapperNode [2020-09-25 09:04:14,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:04:14,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:04:14,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:04:14,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:04:14,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (1/1) ... [2020-09-25 09:04:14,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:04:14,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:04:14,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:04:14,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:04:14,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (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 09:04:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:04:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:04:14,450 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:04:14,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:04:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:04:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:04:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:04:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:04:15,862 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:04:15,863 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:04:15,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:04:15 BoogieIcfgContainer [2020-09-25 09:04:15,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:04:15,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:04:15,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:04:15,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:04:15,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:04:13" (1/3) ... [2020-09-25 09:04:15,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ec2ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:04:15, skipping insertion in model container [2020-09-25 09:04:15,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:14" (2/3) ... [2020-09-25 09:04:15,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ec2ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:04:15, skipping insertion in model container [2020-09-25 09:04:15,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:04:15" (3/3) ... [2020-09-25 09:04:15,883 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2020-09-25 09:04:15,896 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:04:15,908 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:04:15,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:04:15,967 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:04:15,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:04:15,968 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:04:15,968 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:04:15,968 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:04:15,968 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:04:15,969 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:04:15,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:04:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 09:04:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-25 09:04:16,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:16,030 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, 1, 1, 1, 1] [2020-09-25 09:04:16,031 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1669931929, now seen corresponding path program 1 times [2020-09-25 09:04:16,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:16,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159575720] [2020-09-25 09:04:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:16,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:17,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:17,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:18,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:19,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:21,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:21,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-25 09:04:21,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:04:21,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 09:04:21,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:21,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:21,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:04:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:04:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-09-25 09:04:21,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:04:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:21,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:21,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:21,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 09:04:21,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:21,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:04:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:04:21,899 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 09:04:21,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159575720] [2020-09-25 09:04:21,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:04:21,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:04:21,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825678492] [2020-09-25 09:04:21,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:04:21,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:04:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:04:21,937 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 09:04:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:24,256 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-25 09:04:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:04:24,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-09-25 09:04:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:24,288 INFO L225 Difference]: With dead ends: 1386 [2020-09-25 09:04:24,288 INFO L226 Difference]: Without dead ends: 787 [2020-09-25 09:04:24,299 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 09:04:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-25 09:04:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-25 09:04:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-25 09:04:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-25 09:04:24,408 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 164 [2020-09-25 09:04:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:24,409 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-25 09:04:24,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:04:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-25 09:04:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-25 09:04:24,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:24,421 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:04:24,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:04:24,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 591184877, now seen corresponding path program 1 times [2020-09-25 09:04:24,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:24,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084014235] [2020-09-25 09:04:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:24,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:25,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:26,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:29,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-25 09:04:29,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 09:04:29,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 09:04:29,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:29,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:04:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 09:04:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-25 09:04:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:04:29,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:29,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:29,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:29,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:29,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 09:04:29,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:29,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:04:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:29,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:29,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:29,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:29,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:04:29,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:04:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 09:04:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:29,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:04:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:04:29,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:04:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084014235] [2020-09-25 09:04:29,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:29,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:04:29,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437453484] [2020-09-25 09:04:29,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:04:29,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:04:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:04:29,927 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 6 states. [2020-09-25 09:04:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:32,218 INFO L93 Difference]: Finished difference Result 1785 states and 2268 transitions. [2020-09-25 09:04:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:04:32,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2020-09-25 09:04:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:32,230 INFO L225 Difference]: With dead ends: 1785 [2020-09-25 09:04:32,230 INFO L226 Difference]: Without dead ends: 1074 [2020-09-25 09:04:32,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:04:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2020-09-25 09:04:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1042. [2020-09-25 09:04:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-09-25 09:04:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1291 transitions. [2020-09-25 09:04:32,298 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1291 transitions. Word has length 182 [2020-09-25 09:04:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:32,300 INFO L479 AbstractCegarLoop]: Abstraction has 1042 states and 1291 transitions. [2020-09-25 09:04:32,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:04:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1291 transitions. [2020-09-25 09:04:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-25 09:04:32,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:32,309 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, 1, 1, 1, 1] [2020-09-25 09:04:32,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:04:32,309 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash 156773588, now seen corresponding path program 1 times [2020-09-25 09:04:32,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:32,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540766152] [2020-09-25 09:04:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:36,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:36,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:37,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:37,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-09-25 09:04:37,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:04:37,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 09:04:37,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:37,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-25 09:04:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-09-25 09:04:37,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:37,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:37,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:37,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:37,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:37,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:04:37,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:37,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:04:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:04:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:37,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:37,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:37,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 09:04:37,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:37,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 09:04:37,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:37,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:37,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 09:04:37,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:37,629 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 09:04:37,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540766152] [2020-09-25 09:04:37,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:37,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:04:37,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657561810] [2020-09-25 09:04:37,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:04:37,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:04:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:04:37,633 INFO L87 Difference]: Start difference. First operand 1042 states and 1291 transitions. Second operand 5 states. [2020-09-25 09:04:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:40,065 INFO L93 Difference]: Finished difference Result 2688 states and 3451 transitions. [2020-09-25 09:04:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:04:40,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-09-25 09:04:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:40,073 INFO L225 Difference]: With dead ends: 2688 [2020-09-25 09:04:40,073 INFO L226 Difference]: Without dead ends: 981 [2020-09-25 09:04:40,078 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 09:04:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-09-25 09:04:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 969. [2020-09-25 09:04:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2020-09-25 09:04:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1185 transitions. [2020-09-25 09:04:40,111 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1185 transitions. Word has length 198 [2020-09-25 09:04:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:40,112 INFO L479 AbstractCegarLoop]: Abstraction has 969 states and 1185 transitions. [2020-09-25 09:04:40,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:04:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1185 transitions. [2020-09-25 09:04:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-25 09:04:40,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:40,118 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, 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 09:04:40,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:04:40,118 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1119078680, now seen corresponding path program 1 times [2020-09-25 09:04:40,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:40,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566787211] [2020-09-25 09:04:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:40,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:45,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 09:04:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-09-25 09:04:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 09:04:45,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:04:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:45,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:45,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:45,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:45,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:04:45,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:45,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:45,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:04:45,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:04:45,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:45,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:45,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:45,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:04:45,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:45,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 09:04:45,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:45,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 09:04:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:04:45,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566787211] [2020-09-25 09:04:45,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:45,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:04:45,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536545945] [2020-09-25 09:04:45,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:04:45,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:04:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:04:45,756 INFO L87 Difference]: Start difference. First operand 969 states and 1185 transitions. Second operand 8 states. [2020-09-25 09:04:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:49,080 INFO L93 Difference]: Finished difference Result 3048 states and 3975 transitions. [2020-09-25 09:04:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:04:49,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 202 [2020-09-25 09:04:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:49,096 INFO L225 Difference]: With dead ends: 3048 [2020-09-25 09:04:49,096 INFO L226 Difference]: Without dead ends: 1990 [2020-09-25 09:04:49,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:04:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2020-09-25 09:04:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1938. [2020-09-25 09:04:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2020-09-25 09:04:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2324 transitions. [2020-09-25 09:04:49,186 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2324 transitions. Word has length 202 [2020-09-25 09:04:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:49,187 INFO L479 AbstractCegarLoop]: Abstraction has 1938 states and 2324 transitions. [2020-09-25 09:04:49,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:04:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2324 transitions. [2020-09-25 09:04:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-25 09:04:49,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:49,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:49,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:04:49,199 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1463653110, now seen corresponding path program 1 times [2020-09-25 09:04:49,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:49,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083264299] [2020-09-25 09:04:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:49,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:53,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:53,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-09-25 09:04:53,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:04:53,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4691 [2020-09-25 09:04:53,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:53,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:53,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:04:53,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 09:04:53,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-25 09:04:53,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:54,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:54,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:54,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:54,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:54,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 09:04:54,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:54,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:54,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 09:04:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:54,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:54,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:54,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:04:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:04:54,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 09:04:54,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:54,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:54,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:54,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:04:54,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:04:54,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:04:54,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 09:04:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:54,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:04:54,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:54,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 09:04:54,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:54,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:04:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 09:04:54,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:04:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:04:54,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083264299] [2020-09-25 09:04:54,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:54,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:04:54,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959036654] [2020-09-25 09:04:54,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:04:54,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:04:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:04:54,315 INFO L87 Difference]: Start difference. First operand 1938 states and 2324 transitions. Second operand 7 states. [2020-09-25 09:04:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:55,532 INFO L93 Difference]: Finished difference Result 3811 states and 4597 transitions. [2020-09-25 09:04:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:04:55,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2020-09-25 09:04:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:55,544 INFO L225 Difference]: With dead ends: 3811 [2020-09-25 09:04:55,544 INFO L226 Difference]: Without dead ends: 1895 [2020-09-25 09:04:55,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:04:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-09-25 09:04:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1875. [2020-09-25 09:04:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1875 states. [2020-09-25 09:04:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2233 transitions. [2020-09-25 09:04:55,607 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2233 transitions. Word has length 226 [2020-09-25 09:04:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:55,607 INFO L479 AbstractCegarLoop]: Abstraction has 1875 states and 2233 transitions. [2020-09-25 09:04:55,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:04:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2233 transitions. [2020-09-25 09:04:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-09-25 09:04:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:55,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:55,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:04:55,616 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash -387844278, now seen corresponding path program 1 times [2020-09-25 09:04:55,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:55,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683633342] [2020-09-25 09:04:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:55,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:55,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:00,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-09-25 09:05:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:05:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-09-25 09:05:00,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:00,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:05:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 09:05:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 09:05:00,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:05:00,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:05:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:00,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:00,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:05:00,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:05:00,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:05:00,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:00,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:05:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:05:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:05:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1