/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:03:32,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:03:32,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:03:32,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:03:32,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:03:32,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:03:32,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:03:32,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:03:32,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:03:32,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:03:32,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:03:32,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:03:32,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:03:32,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:03:32,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:03:32,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:03:32,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:03:32,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:03:32,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:03:32,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:03:32,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:03:32,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:03:32,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:03:32,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:03:32,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:03:32,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:03:32,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:03:32,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:03:32,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:03:32,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:03:32,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:03:32,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:03:32,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:03:32,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:03:32,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:03:32,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:03:32,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:03:32,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:03:32,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:03:32,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:03:32,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:03:32,881 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 [2020-10-15 00:03:32,929 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:03:32,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:03:32,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:03:32,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:03:32,934 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:03:32,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:03:32,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:03:32,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:03:32,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:03:32,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:03:32,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:03:32,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:03:32,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:03:32,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:03:32,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:03:32,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:03:32,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:03:32,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:03:32,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:03:32,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:03:32,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:03:32,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:03:32,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:03:32,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:03:32,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:03:32,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:03:32,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:03:32,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:03:32,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:03:32,943 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-15 00:03:33,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:03:33,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:03:33,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:03:33,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:03:33,311 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:03:33,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-15 00:03:33,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b872f37fc/29e52101e8434764b908e32a9cadf982/FLAG6fada6327 [2020-10-15 00:03:33,854 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:03:33,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-15 00:03:33,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b872f37fc/29e52101e8434764b908e32a9cadf982/FLAG6fada6327 [2020-10-15 00:03:34,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b872f37fc/29e52101e8434764b908e32a9cadf982 [2020-10-15 00:03:34,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:03:34,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:03:34,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:03:34,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:03:34,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:03:34,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b40c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34, skipping insertion in model container [2020-10-15 00:03:34,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:03:34,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:03:34,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:03:34,421 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:03:34,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:03:34,451 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:03:34,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34 WrapperNode [2020-10-15 00:03:34,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:03:34,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:03:34,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:03:34,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:03:34,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (1/1) ... [2020-10-15 00:03:34,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:03:34,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:03:34,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:03:34,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:03:34,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (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 [2020-10-15 00:03:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:03:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:03:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:03:34,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:03:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:03:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:03:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:03:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:03:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:03:34,804 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:03:34,804 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:03:34,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:34 BoogieIcfgContainer [2020-10-15 00:03:34,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:03:34,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:03:34,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:03:34,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:03:34,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:34" (1/3) ... [2020-10-15 00:03:34,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4dfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:34, skipping insertion in model container [2020-10-15 00:03:34,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:34" (2/3) ... [2020-10-15 00:03:34,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4dfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:34, skipping insertion in model container [2020-10-15 00:03:34,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:34" (3/3) ... [2020-10-15 00:03:34,816 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2020-10-15 00:03:34,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:03:34,834 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:03:34,847 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:03:34,869 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:03:34,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:03:34,869 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:03:34,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:03:34,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:03:34,870 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:03:34,870 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:03:34,870 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:03:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-15 00:03:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:03:34,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:34,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:34,893 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-15 00:03:34,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:34,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152444777] [2020-10-15 00:03:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:03:35,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-15 00:03:35,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:03:35,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:35,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:03:35,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:35,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152444777] [2020-10-15 00:03:35,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:03:35,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 00:03:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40353088] [2020-10-15 00:03:35,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-15 00:03:35,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:35,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-15 00:03:35,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 00:03:35,107 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-15 00:03:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:35,130 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-15 00:03:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-15 00:03:35,132 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-15 00:03:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:35,140 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:03:35,141 INFO L226 Difference]: Without dead ends: 13 [2020-10-15 00:03:35,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 00:03:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-15 00:03:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-15 00:03:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 00:03:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-15 00:03:35,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-15 00:03:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:35,184 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-15 00:03:35,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-15 00:03:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-15 00:03:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:03:35,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:35,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:35,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:03:35,186 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-10-15 00:03:35,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:35,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720231061] [2020-10-15 00:03:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:03:35,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-15 00:03:35,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:03:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:03:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:35,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:35,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:03:35,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:35,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:35,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:03:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:35,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720231061] [2020-10-15 00:03:35,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:03:35,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:03:35,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473397037] [2020-10-15 00:03:35,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:03:35,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:35,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:03:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:03:35,430 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-15 00:03:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:35,466 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-15 00:03:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:03:35,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-15 00:03:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:35,469 INFO L225 Difference]: With dead ends: 21 [2020-10-15 00:03:35,469 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:03:35,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:03:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:03:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-15 00:03:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 00:03:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-15 00:03:35,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-15 00:03:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:35,479 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-15 00:03:35,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:03:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-15 00:03:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:03:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:35,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:35,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:03:35,481 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-10-15 00:03:35,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:35,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348950457] [2020-10-15 00:03:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:03:35,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:35,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-15 00:03:35,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:03:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:03:35,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:03:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:35,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:03:35,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:35,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 00:03:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:35,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348950457] [2020-10-15 00:03:35,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:35,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:03:35,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538731433] [2020-10-15 00:03:35,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:03:35,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:03:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:03:35,948 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-15 00:03:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:36,010 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-15 00:03:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:03:36,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-15 00:03:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:36,012 INFO L225 Difference]: With dead ends: 24 [2020-10-15 00:03:36,013 INFO L226 Difference]: Without dead ends: 19 [2020-10-15 00:03:36,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:03:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-15 00:03:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-15 00:03:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 00:03:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-15 00:03:36,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-15 00:03:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:36,026 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-15 00:03:36,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:03:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-15 00:03:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:03:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:36,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:36,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:03:36,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2020-10-15 00:03:36,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:36,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485420704] [2020-10-15 00:03:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:36,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:36,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:03:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:36,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-15 00:03:36,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:36,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:03:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:03:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:36,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:36,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:36,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:36,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:36,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:36,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:36,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:36,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:36,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485420704] [2020-10-15 00:03:36,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:36,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:03:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313947827] [2020-10-15 00:03:36,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:03:36,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:03:36,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:03:36,503 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-15 00:03:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:36,578 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-15 00:03:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:03:36,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-15 00:03:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:36,579 INFO L225 Difference]: With dead ends: 28 [2020-10-15 00:03:36,579 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:03:36,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:03:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:03:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-15 00:03:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:03:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-15 00:03:36,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-15 00:03:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:36,588 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-15 00:03:36,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:03:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-15 00:03:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:03:36,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:36,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:36,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:03:36,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2020-10-15 00:03:36,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:36,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343303630] [2020-10-15 00:03:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:36,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:03:37,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:03:37,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-15 00:03:37,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:03:37,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:37,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:03:37,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:37,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:03:37,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:37,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343303630] [2020-10-15 00:03:37,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:37,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:03:37,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189043496] [2020-10-15 00:03:37,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:03:37,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:03:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:03:37,192 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-10-15 00:03:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:37,251 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-15 00:03:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:03:37,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-15 00:03:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:37,253 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:03:37,253 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:03:37,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:03:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:03:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-15 00:03:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:03:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-15 00:03:37,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-15 00:03:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:37,270 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-15 00:03:37,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:03:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-15 00:03:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:03:37,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:37,273 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:37,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:03:37,274 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 1 times [2020-10-15 00:03:37,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:37,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558035619] [2020-10-15 00:03:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:03:37,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:37,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-15 00:03:37,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:03:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:03:37,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:37,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:37,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:37,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:03:37,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558035619] [2020-10-15 00:03:37,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:37,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:03:37,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753407393] [2020-10-15 00:03:37,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:03:37,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:03:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:03:37,621 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-15 00:03:37,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:37,698 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-15 00:03:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:03:37,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-15 00:03:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:37,701 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:03:37,701 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:03:37,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:03:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:03:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-15 00:03:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:03:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-15 00:03:37,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-15 00:03:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:37,713 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-15 00:03:37,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:03:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-15 00:03:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:03:37,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:37,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:37,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:03:37,716 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1682133644, now seen corresponding path program 1 times [2020-10-15 00:03:37,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:37,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178778203] [2020-10-15 00:03:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:38,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:03:38,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:03:38,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-15 00:03:38,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:38,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:03:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:03:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:38,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:38,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:38,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:38,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:38,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:38,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:38,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:03:38,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178778203] [2020-10-15 00:03:38,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:38,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:03:38,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455065123] [2020-10-15 00:03:38,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:03:38,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:03:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:03:38,328 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-15 00:03:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:38,474 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-15 00:03:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:03:38,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-15 00:03:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:38,476 INFO L225 Difference]: With dead ends: 34 [2020-10-15 00:03:38,476 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:03:38,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:03:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:03:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-15 00:03:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:03:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-15 00:03:38,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-15 00:03:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:38,488 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-15 00:03:38,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:03:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-15 00:03:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:03:38,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:38,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:38,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:03:38,491 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1392210665, now seen corresponding path program 2 times [2020-10-15 00:03:38,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:38,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991883723] [2020-10-15 00:03:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:39,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:03:39,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:03:39,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-15 00:03:39,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:39,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:03:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:03:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:39,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:39,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:39,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:03:39,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:39,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:39,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:03:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:39,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991883723] [2020-10-15 00:03:39,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:39,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:03:39,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104101374] [2020-10-15 00:03:39,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:03:39,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:03:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:03:39,475 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-15 00:03:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:39,553 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-15 00:03:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:03:39,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-15 00:03:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:39,556 INFO L225 Difference]: With dead ends: 46 [2020-10-15 00:03:39,556 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:03:39,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:03:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:03:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-15 00:03:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:03:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-15 00:03:39,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-10-15 00:03:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:39,569 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-15 00:03:39,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:03:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-15 00:03:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:03:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:39,571 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:39,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:03:39,571 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1147963575, now seen corresponding path program 3 times [2020-10-15 00:03:39,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:39,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181350015] [2020-10-15 00:03:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:40,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:42,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:03:42,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 00:03:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3010 [2020-10-15 00:03:42,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:42,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:03:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:03:42,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:42,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:42,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:42,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:42,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:42,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:42,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:03:42,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181350015] [2020-10-15 00:03:42,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:42,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:03:42,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521577233] [2020-10-15 00:03:42,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:03:42,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:42,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:03:42,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:03:42,725 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-15 00:03:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:43,082 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-15 00:03:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:03:43,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-15 00:03:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:43,084 INFO L225 Difference]: With dead ends: 46 [2020-10-15 00:03:43,085 INFO L226 Difference]: Without dead ends: 41 [2020-10-15 00:03:43,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:03:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-15 00:03:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-15 00:03:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:03:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-15 00:03:43,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-10-15 00:03:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:43,093 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-15 00:03:43,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:03:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-15 00:03:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:03:43,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:43,094 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:43,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:03:43,094 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -173979916, now seen corresponding path program 4 times [2020-10-15 00:03:43,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:43,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747465829] [2020-10-15 00:03:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:43,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:46,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:46,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:03:46,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:03:46,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3820 [2020-10-15 00:03:46,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:46,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:03:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:46,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:03:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:47,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:47,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:47,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:47,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:47,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:47,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:03:47,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747465829] [2020-10-15 00:03:47,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:47,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:03:47,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997771822] [2020-10-15 00:03:47,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:03:47,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:03:47,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:03:47,142 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-15 00:03:53,605 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-15 00:03:55,767 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-15 00:03:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:58,075 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-15 00:03:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:03:58,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-15 00:03:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:58,077 INFO L225 Difference]: With dead ends: 62 [2020-10-15 00:03:58,077 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:03:58,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=78, Invalid=165, Unknown=1, NotChecked=28, Total=272 [2020-10-15 00:03:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:03:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-15 00:03:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 00:03:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-15 00:03:58,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2020-10-15 00:03:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:58,086 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-15 00:03:58,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:03:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-15 00:03:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:03:58,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:58,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:58,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:03:58,088 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1637383273, now seen corresponding path program 5 times [2020-10-15 00:03:58,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:58,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937894077] [2020-10-15 00:03:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:03,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:03,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:04:03,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:04:03,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 00:04:03,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:03,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:04:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:04:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:05,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:05,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:05,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:05,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:05,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:05,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 88 refuted. 3 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:04:05,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937894077] [2020-10-15 00:04:05,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:05,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:04:05,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078332376] [2020-10-15 00:04:05,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:04:05,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:04:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2020-10-15 00:04:05,408 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-15 00:04:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:08,667 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-15 00:04:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:04:08,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-15 00:04:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:08,670 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:04:08,670 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:04:08,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=149, Invalid=311, Unknown=2, NotChecked=0, Total=462 [2020-10-15 00:04:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:04:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-10-15 00:04:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:04:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-15 00:04:08,680 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 37 [2020-10-15 00:04:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:08,680 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-15 00:04:08,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:04:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-15 00:04:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:04:08,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:08,681 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:08,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:04:08,682 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash 326230036, now seen corresponding path program 6 times [2020-10-15 00:04:08,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:08,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687641309] [2020-10-15 00:04:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:08,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:08,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:13,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:13,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:04:13,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:04:13,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 00:04:13,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:13,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:13,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:04:13,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:13,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:04:13,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:14,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:14,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:14,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:04:14,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687641309] [2020-10-15 00:04:14,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:14,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:04:14,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764661430] [2020-10-15 00:04:14,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:04:14,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:14,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:04:14,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:04:14,045 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 10 states. [2020-10-15 00:04:16,907 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-15 00:04:21,274 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2020-10-15 00:04:23,808 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-15 00:04:25,892 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-15 00:04:27,942 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-15 00:04:28,140 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-15 00:04:28,425 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-15 00:04:35,892 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-15 00:04:39,293 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-15 00:04:41,636 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 00:04:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:48,900 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2020-10-15 00:04:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:04:48,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-15 00:04:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:48,903 INFO L225 Difference]: With dead ends: 133 [2020-10-15 00:04:48,904 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 00:04:48,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=217, Invalid=544, Unknown=3, NotChecked=106, Total=870 [2020-10-15 00:04:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 00:04:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 73. [2020-10-15 00:04:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:04:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-15 00:04:48,923 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 40 [2020-10-15 00:04:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:48,923 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-15 00:04:48,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:04:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-15 00:04:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:04:48,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:48,925 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:48,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:04:48,925 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 875746935, now seen corresponding path program 7 times [2020-10-15 00:04:48,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:48,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558996109] [2020-10-15 00:04:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:53,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:53,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:04:53,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4204 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:04:53,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:53,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:53,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:53,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:04:53,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558996109] [2020-10-15 00:04:53,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:53,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:04:53,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758830471] [2020-10-15 00:04:53,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:04:53,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:04:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:04:53,525 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 11 states. [2020-10-15 00:04:58,423 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-15 00:05:00,473 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296))))) is different from false [2020-10-15 00:05:03,157 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-15 00:05:14,406 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-15 00:05:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:16,783 INFO L93 Difference]: Finished difference Result 326 states and 418 transitions. [2020-10-15 00:05:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:05:16,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-15 00:05:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:16,786 INFO L225 Difference]: With dead ends: 326 [2020-10-15 00:05:16,786 INFO L226 Difference]: Without dead ends: 321 [2020-10-15 00:05:16,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=141, Invalid=511, Unknown=6, NotChecked=98, Total=756 [2020-10-15 00:05:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-15 00:05:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 106. [2020-10-15 00:05:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-15 00:05:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2020-10-15 00:05:16,814 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 43 [2020-10-15 00:05:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:16,815 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2020-10-15 00:05:16,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:05:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2020-10-15 00:05:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:05:16,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:16,816 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:16,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:05:16,817 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -881647308, now seen corresponding path program 8 times [2020-10-15 00:05:16,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:16,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734886356] [2020-10-15 00:05:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:21,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:21,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:05:21,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:05:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:05:21,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:21,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:05:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:05:21,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:22,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:22,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:22,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:22,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:22,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 00:05:22,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734886356] [2020-10-15 00:05:22,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:22,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:05:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266862820] [2020-10-15 00:05:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:05:22,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:05:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:05:22,289 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 12 states. [2020-10-15 00:05:32,960 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-15 00:05:37,668 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-15 00:05:42,068 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2020-10-15 00:05:42,292 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-15 00:05:42,719 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-15 00:05:50,754 WARN L193 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-10-15 00:05:55,266 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-15 00:05:56,437 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-15 00:05:59,876 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-15 00:06:06,920 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-15 00:06:10,398 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-15 00:06:11,171 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-15 00:06:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:36,509 INFO L93 Difference]: Finished difference Result 205 states and 265 transitions. [2020-10-15 00:06:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:06:36,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-15 00:06:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:36,514 INFO L225 Difference]: With dead ends: 205 [2020-10-15 00:06:36,515 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 00:06:36,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=326, Invalid=790, Unknown=6, NotChecked=0, Total=1122 [2020-10-15 00:06:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 00:06:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 50. [2020-10-15 00:06:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:06:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-15 00:06:36,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2020-10-15 00:06:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:36,529 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-15 00:06:36,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:06:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-15 00:06:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:06:36,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:36,530 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:36,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:06:36,531 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash 237797719, now seen corresponding path program 9 times [2020-10-15 00:06:36,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:36,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917668589] [2020-10-15 00:06:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:37,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:41,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:41,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:06:41,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:06:41,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:06:41,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:41,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:06:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:06:41,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:41,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:41,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:41,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:41,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:41,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:41,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 85 proven. 155 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:06:41,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917668589] [2020-10-15 00:06:41,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:41,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:06:41,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042908486] [2020-10-15 00:06:41,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:06:41,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:06:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:06:41,741 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-10-15 00:06:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:42,070 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-15 00:06:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:06:42,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-15 00:06:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:42,071 INFO L225 Difference]: With dead ends: 100 [2020-10-15 00:06:42,071 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:06:42,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:06:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:06:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-15 00:06:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 00:06:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-15 00:06:42,091 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 49 [2020-10-15 00:06:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:42,091 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-15 00:06:42,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:06:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-15 00:06:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 00:06:42,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:42,093 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:42,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:06:42,093 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash -697684937, now seen corresponding path program 10 times [2020-10-15 00:06:42,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:42,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880176405] [2020-10-15 00:06:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:47,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:47,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 00:06:47,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-15 00:06:47,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-15 00:06:47,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:47,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:47,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:06:47,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:47,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:06:47,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:47,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:47,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:47,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:47,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:47,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:47,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:47,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:47,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:47,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:47,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-15 00:06:47,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880176405] [2020-10-15 00:06:47,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:47,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:06:47,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803151086] [2020-10-15 00:06:47,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:06:47,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:06:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:06:47,679 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 13 states. [2020-10-15 00:06:50,127 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-10-15 00:07:03,218 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2020-10-15 00:07:07,490 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-15 00:07:11,627 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 73 DAG size of output: 24 [2020-10-15 00:07:18,217 WARN L193 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-10-15 00:07:24,060 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-10-15 00:07:30,041 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-15 00:07:35,167 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25