/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:09:27,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:09:27,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:09:27,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:09:27,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:09:27,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:09:27,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:09:27,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:09:27,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:09:27,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:09:27,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:09:27,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:09:27,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:09:27,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:09:27,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:09:27,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:09:27,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:09:27,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:09:27,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:09:27,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:09:27,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:09:27,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:09:27,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:09:27,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:09:27,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:09:27,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:09:27,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:09:27,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:09:27,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:09:27,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:09:27,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:09:27,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:09:27,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:09:27,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:09:27,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:09:27,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:09:27,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:09:27,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:09:27,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:09:27,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:09:27,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:09:27,904 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 00:09:27,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:09:27,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:09:27,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:09:27,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:09:27,949 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:09:27,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:09:27,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:09:27,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:09:27,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:09:27,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:09:27,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:09:27,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:09:27,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:09:27,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:09:27,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:09:27,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:09:27,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:09:27,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:09:27,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:09:27,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:09:27,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:09:27,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:09:27,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:09:27,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:09:27,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:09:27,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:09:27,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:09:27,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:09:27,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:09:27,956 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 00:09:28,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:09:28,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:09:28,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:09:28,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:09:28,312 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:09:28,313 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2020-10-15 00:09:28,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13822fd26/d13cec9feff542f09c2bb3a91cbbc0dd/FLAG193ea7369 [2020-10-15 00:09:28,833 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:09:28,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/insertion_sort-2.c [2020-10-15 00:09:28,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13822fd26/d13cec9feff542f09c2bb3a91cbbc0dd/FLAG193ea7369 [2020-10-15 00:09:29,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13822fd26/d13cec9feff542f09c2bb3a91cbbc0dd [2020-10-15 00:09:29,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:09:29,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:09:29,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:29,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:09:29,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:09:29,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d9305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29, skipping insertion in model container [2020-10-15 00:09:29,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:09:29,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:09:29,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:29,481 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:09:29,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:09:29,528 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:09:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29 WrapperNode [2020-10-15 00:09:29,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:09:29,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:09:29,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:09:29,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:09:29,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (1/1) ... [2020-10-15 00:09:29,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:09:29,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:09:29,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:09:29,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:09:29,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (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 00:09:29,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:09:29,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:09:29,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:09:29,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:09:29,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:09:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:09:29,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-15 00:09:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:09:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 00:09:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 00:09:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 00:09:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 00:09:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:09:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:09:30,068 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:09:30,068 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-15 00:09:30,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:30 BoogieIcfgContainer [2020-10-15 00:09:30,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:09:30,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:09:30,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:09:30,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:09:30,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:29" (1/3) ... [2020-10-15 00:09:30,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7d418a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:30, skipping insertion in model container [2020-10-15 00:09:30,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29" (2/3) ... [2020-10-15 00:09:30,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7d418a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:30, skipping insertion in model container [2020-10-15 00:09:30,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:30" (3/3) ... [2020-10-15 00:09:30,080 INFO L109 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2020-10-15 00:09:30,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:09:30,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:09:30,108 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:09:30,130 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:09:30,130 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:09:30,130 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:09:30,131 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:09:30,131 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:09:30,131 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:09:30,131 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:09:30,131 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:09:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-15 00:09:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:09:30,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:30,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:30,158 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:30,165 INFO L82 PathProgramCache]: Analyzing trace with hash 637757472, now seen corresponding path program 1 times [2020-10-15 00:09:30,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:30,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067245904] [2020-10-15 00:09:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:30,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:30,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:30,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:09:30,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-15 00:09:30,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:30,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:30,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:09:30,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:30,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:30,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:30,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:30,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 00:09:30,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:30,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:30,475 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 00:09:30,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067245904] [2020-10-15 00:09:30,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:30,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:09:30,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164382] [2020-10-15 00:09:30,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:09:30,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:09:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:09:30,503 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-15 00:09:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:30,604 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-15 00:09:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:09:30,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-15 00:09:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:30,616 INFO L225 Difference]: With dead ends: 50 [2020-10-15 00:09:30,616 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:09:30,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 00:09:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:09:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-15 00:09:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:09:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-15 00:09:30,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2020-10-15 00:09:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:30,678 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-15 00:09:30,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:09:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-15 00:09:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:09:30,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:30,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:30,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:09:30,680 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash -962501754, now seen corresponding path program 1 times [2020-10-15 00:09:30,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:30,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421430032] [2020-10-15 00:09:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:30,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:30,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:30,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:09:30,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-15 00:09:30,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:30,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:30,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:09:30,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:31,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:31,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:31,094 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 00:09:31,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421430032] [2020-10-15 00:09:31,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:09:31,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 00:09:31,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398068287] [2020-10-15 00:09:31,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:31,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:31,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:31,104 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-15 00:09:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:31,299 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-15 00:09:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:09:31,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-15 00:09:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:31,301 INFO L225 Difference]: With dead ends: 41 [2020-10-15 00:09:31,301 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:09:31,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:09:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-10-15 00:09:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:09:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-15 00:09:31,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2020-10-15 00:09:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:31,310 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-15 00:09:31,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-15 00:09:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:09:31,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:31,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:31,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:09:31,312 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash 513665657, now seen corresponding path program 1 times [2020-10-15 00:09:31,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:31,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367365164] [2020-10-15 00:09:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:31,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:09:31,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-15 00:09:31,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:31,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:09:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:09:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:32,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:32,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:32,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:32,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:32,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:32,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:32,205 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 00:09:32,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367365164] [2020-10-15 00:09:32,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:32,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:09:32,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720913966] [2020-10-15 00:09:32,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:09:32,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:09:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:09:32,209 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 12 states. [2020-10-15 00:09:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:32,783 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-15 00:09:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:09:32,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-15 00:09:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:32,788 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:09:32,788 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:09:32,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:09:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:09:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-10-15 00:09:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:09:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-15 00:09:32,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2020-10-15 00:09:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:32,803 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-15 00:09:32,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:09:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-15 00:09:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:09:32,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:32,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:32,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:09:32,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:32,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1646110777, now seen corresponding path program 1 times [2020-10-15 00:09:32,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:32,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904092184] [2020-10-15 00:09:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:33,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:09:33,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:33,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-15 00:09:33,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:33,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:09:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:09:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:33,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:33,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:33,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:33,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:33,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:33,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:33,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904092184] [2020-10-15 00:09:33,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:33,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:09:33,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587534659] [2020-10-15 00:09:33,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:09:33,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:09:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:09:33,658 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2020-10-15 00:09:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:34,215 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-15 00:09:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:09:34,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-15 00:09:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:34,219 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:09:34,219 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:09:34,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:09:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:09:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2020-10-15 00:09:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:09:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-15 00:09:34,231 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-10-15 00:09:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:34,231 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-15 00:09:34,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:09:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-15 00:09:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:09:34,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:34,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:34,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:09:34,233 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1126706988, now seen corresponding path program 2 times [2020-10-15 00:09:34,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:34,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829779078] [2020-10-15 00:09:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:34,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:34,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:34,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:34,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:09:34,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-15 00:09:34,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:34,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:34,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:09:34,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:35,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:35,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:35,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:35,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:35,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:35,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:35,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:35,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:35,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:35,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:35,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829779078] [2020-10-15 00:09:35,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:35,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:09:35,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58729784] [2020-10-15 00:09:35,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:09:35,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:09:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:09:35,066 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 13 states. [2020-10-15 00:09:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:35,665 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-15 00:09:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:09:35,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-15 00:09:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:35,670 INFO L225 Difference]: With dead ends: 83 [2020-10-15 00:09:35,670 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:09:35,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:09:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:09:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 46. [2020-10-15 00:09:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:09:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-15 00:09:35,682 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 25 [2020-10-15 00:09:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:35,682 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-15 00:09:35,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:09:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-15 00:09:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:09:35,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:35,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:35,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:09:35,684 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1350570617, now seen corresponding path program 2 times [2020-10-15 00:09:35,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:35,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357253623] [2020-10-15 00:09:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:09:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:09:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-15 00:09:36,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:09:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:36,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:36,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:36,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:36,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:36,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:09:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:36,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357253623] [2020-10-15 00:09:36,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:36,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:09:36,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012224553] [2020-10-15 00:09:36,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:09:36,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:09:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:36,076 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 8 states. [2020-10-15 00:09:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:36,254 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-10-15 00:09:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:09:36,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-15 00:09:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:36,261 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:09:36,261 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:09:36,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:09:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:09:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-10-15 00:09:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 00:09:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-15 00:09:36,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2020-10-15 00:09:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:36,278 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-15 00:09:36,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:09:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-15 00:09:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:09:36,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:36,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:36,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:09:36,282 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1757940304, now seen corresponding path program 1 times [2020-10-15 00:09:36,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:36,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860216163] [2020-10-15 00:09:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:36,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:36,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-15 00:09:36,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:36,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:36,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:36,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:36,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:36,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:09:36,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-15 00:09:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:36,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:36,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:09:36,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:36,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:36,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:36,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860216163] [2020-10-15 00:09:36,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:36,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:09:36,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476360126] [2020-10-15 00:09:36,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:09:36,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:09:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:36,601 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 8 states. [2020-10-15 00:09:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:36,776 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-10-15 00:09:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:09:36,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-15 00:09:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:36,778 INFO L225 Difference]: With dead ends: 80 [2020-10-15 00:09:36,779 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:09:36,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:09:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-10-15 00:09:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 00:09:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-15 00:09:36,797 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2020-10-15 00:09:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:36,797 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-15 00:09:36,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:09:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-15 00:09:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:36,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:36,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:36,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:09:36,801 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1735507290, now seen corresponding path program 3 times [2020-10-15 00:09:36,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:36,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820399244] [2020-10-15 00:09:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:36,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:39,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:09:39,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:09:39,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-15 00:09:39,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:39,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:09:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:09:40,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:40,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:40,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:40,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:40,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:40,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:40,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820399244] [2020-10-15 00:09:40,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:40,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:40,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900720877] [2020-10-15 00:09:40,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:40,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:40,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:40,102 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 14 states. [2020-10-15 00:09:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:41,281 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2020-10-15 00:09:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:09:41,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-15 00:09:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:41,283 INFO L225 Difference]: With dead ends: 132 [2020-10-15 00:09:41,283 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 00:09:41,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:09:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 00:09:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 65. [2020-10-15 00:09:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:09:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-15 00:09:41,308 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 28 [2020-10-15 00:09:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:41,309 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-15 00:09:41,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-15 00:09:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:41,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:41,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:41,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:09:41,312 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -215590674, now seen corresponding path program 1 times [2020-10-15 00:09:41,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:41,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137708458] [2020-10-15 00:09:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:41,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:42,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:45,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:09:45,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:09:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3696 [2020-10-15 00:09:45,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:45,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:09:45,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:45,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:45,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:45,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:45,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:45,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:45,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:09:45,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137708458] [2020-10-15 00:09:45,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:45,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:09:45,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175364901] [2020-10-15 00:09:45,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:09:45,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:09:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:09:45,269 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 13 states. [2020-10-15 00:09:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:45,760 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-15 00:09:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:09:45,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-15 00:09:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:45,761 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:09:45,762 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:09:45,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:09:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:09:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-15 00:09:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:09:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-15 00:09:45,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 28 [2020-10-15 00:09:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:45,771 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-15 00:09:45,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:09:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-15 00:09:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:09:45,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:45,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:45,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:09:45,773 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1975335700, now seen corresponding path program 4 times [2020-10-15 00:09:45,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:45,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062211631] [2020-10-15 00:09:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:45,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:09:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:09:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2537 [2020-10-15 00:09:48,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:09:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:48,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:48,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:48,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062211631] [2020-10-15 00:09:48,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:48,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:48,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825742472] [2020-10-15 00:09:48,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:48,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:48,782 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 14 states. [2020-10-15 00:09:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:50,178 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-10-15 00:09:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:09:50,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-15 00:09:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:50,180 INFO L225 Difference]: With dead ends: 143 [2020-10-15 00:09:50,180 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 00:09:50,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:09:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 00:09:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 61. [2020-10-15 00:09:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:09:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-15 00:09:50,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 31 [2020-10-15 00:09:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:50,193 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-15 00:09:50,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-15 00:09:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:09:50,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:50,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:50,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:09:50,195 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1796724579, now seen corresponding path program 2 times [2020-10-15 00:09:50,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:50,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074586730] [2020-10-15 00:09:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:09:50,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:50,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-15 00:09:50,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:50,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:09:50,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:50,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:50,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:50,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-15 00:09:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:50,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:50,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:50,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:50,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:50,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:50,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:50,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074586730] [2020-10-15 00:09:50,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:50,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:50,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235557138] [2020-10-15 00:09:50,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:50,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:50,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:50,732 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 14 states. [2020-10-15 00:09:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:51,211 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-15 00:09:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:09:51,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-15 00:09:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:51,213 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:09:51,214 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:09:51,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:09:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:09:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 00:09:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 00:09:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-10-15 00:09:51,225 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 33 [2020-10-15 00:09:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:51,225 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-10-15 00:09:51,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-10-15 00:09:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:09:51,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:51,227 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:51,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:09:51,228 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1084921683, now seen corresponding path program 5 times [2020-10-15 00:09:51,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:51,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821922705] [2020-10-15 00:09:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:52,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:55,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:09:56,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:09:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:09:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:09:56,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:56,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:56,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:56,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821922705] [2020-10-15 00:09:56,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:56,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:09:56,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665822855] [2020-10-15 00:09:56,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:09:56,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:09:56,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:09:56,987 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 18 states. [2020-10-15 00:09:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:58,205 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-10-15 00:09:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:09:58,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-15 00:09:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:58,208 INFO L225 Difference]: With dead ends: 156 [2020-10-15 00:09:58,208 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 00:09:58,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:09:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 00:09:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 105. [2020-10-15 00:09:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 00:09:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2020-10-15 00:09:58,234 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 34 [2020-10-15 00:09:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:58,236 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2020-10-15 00:09:58,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:09:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2020-10-15 00:09:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:09:58,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:58,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:58,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:09:58,240 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -101781095, now seen corresponding path program 6 times [2020-10-15 00:09:58,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:58,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420585179] [2020-10-15 00:09:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:01,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:10:01,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 00:10:01,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3646 [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:10:01,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:02,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:02,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:02,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:02,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:02,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:02,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:10:02,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420585179] [2020-10-15 00:10:02,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:02,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:02,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133346145] [2020-10-15 00:10:02,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:02,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:02,330 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand 15 states. [2020-10-15 00:10:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:03,846 INFO L93 Difference]: Finished difference Result 175 states and 219 transitions. [2020-10-15 00:10:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:10:03,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-15 00:10:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:03,850 INFO L225 Difference]: With dead ends: 175 [2020-10-15 00:10:03,850 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 00:10:03,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:10:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 00:10:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2020-10-15 00:10:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 00:10:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2020-10-15 00:10:03,865 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 34 [2020-10-15 00:10:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:03,866 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2020-10-15 00:10:03,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2020-10-15 00:10:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:10:03,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:03,867 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:03,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:10:03,867 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash 122082534, now seen corresponding path program 7 times [2020-10-15 00:10:03,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:03,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483881018] [2020-10-15 00:10:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:04,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:04,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:05,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:05,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:10:05,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:10:05,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:10:05,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:05,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:05,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:05,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:05,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:10:05,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483881018] [2020-10-15 00:10:05,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:05,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:05,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019053673] [2020-10-15 00:10:05,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:05,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:05,454 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand 16 states. [2020-10-15 00:10:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:06,319 INFO L93 Difference]: Finished difference Result 218 states and 279 transitions. [2020-10-15 00:10:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:10:06,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-15 00:10:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:06,322 INFO L225 Difference]: With dead ends: 218 [2020-10-15 00:10:06,322 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 00:10:06,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:10:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 00:10:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 144. [2020-10-15 00:10:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 00:10:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2020-10-15 00:10:06,344 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 34 [2020-10-15 00:10:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:06,345 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2020-10-15 00:10:06,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2020-10-15 00:10:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:10:06,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:06,347 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:06,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:10:06,347 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 823147112, now seen corresponding path program 2 times [2020-10-15 00:10:06,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:06,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072976160] [2020-10-15 00:10:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:06,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:06,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:10:07,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:07,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:10:07,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:07,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:07,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:07,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:10:07,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072976160] [2020-10-15 00:10:07,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:07,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:10:07,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528255845] [2020-10-15 00:10:07,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:10:07,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:10:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:10:07,311 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand 9 states. [2020-10-15 00:10:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:07,646 INFO L93 Difference]: Finished difference Result 211 states and 272 transitions. [2020-10-15 00:10:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:10:07,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-15 00:10:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:07,649 INFO L225 Difference]: With dead ends: 211 [2020-10-15 00:10:07,649 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 00:10:07,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:10:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 00:10:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2020-10-15 00:10:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 00:10:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2020-10-15 00:10:07,664 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 34 [2020-10-15 00:10:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:07,665 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2020-10-15 00:10:07,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:10:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2020-10-15 00:10:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:10:07,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:07,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:07,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:10:07,666 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1218981667, now seen corresponding path program 1 times [2020-10-15 00:10:07,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:07,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839203924] [2020-10-15 00:10:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:07,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-15 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:07,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:10:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:10:07,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-15 00:10:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:08,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:08,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:08,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:08,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839203924] [2020-10-15 00:10:08,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:08,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:10:08,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967932098] [2020-10-15 00:10:08,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:10:08,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:10:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:10:08,143 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand 14 states. [2020-10-15 00:10:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:09,081 INFO L93 Difference]: Finished difference Result 175 states and 225 transitions. [2020-10-15 00:10:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:10:09,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-15 00:10:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:09,084 INFO L225 Difference]: With dead ends: 175 [2020-10-15 00:10:09,084 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 00:10:09,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:10:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 00:10:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 140. [2020-10-15 00:10:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 00:10:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2020-10-15 00:10:09,100 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 36 [2020-10-15 00:10:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:09,100 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2020-10-15 00:10:09,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:10:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2020-10-15 00:10:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:10:09,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:09,101 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:09,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:10:09,101 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -319948127, now seen corresponding path program 3 times [2020-10-15 00:10:09,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:09,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841958331] [2020-10-15 00:10:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:09,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:14,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:10:14,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-15 00:10:14,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:10:14,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:14,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:10:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:10:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:14,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841958331] [2020-10-15 00:10:14,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:14,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:10:14,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227866498] [2020-10-15 00:10:14,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:10:14,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:10:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:10:14,641 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand 19 states. [2020-10-15 00:10:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:17,242 INFO L93 Difference]: Finished difference Result 336 states and 432 transitions. [2020-10-15 00:10:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:10:17,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-15 00:10:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:17,245 INFO L225 Difference]: With dead ends: 336 [2020-10-15 00:10:17,245 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 00:10:17,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:10:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 00:10:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 136. [2020-10-15 00:10:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 00:10:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-10-15 00:10:17,284 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 37 [2020-10-15 00:10:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:17,284 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-10-15 00:10:17,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:10:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-10-15 00:10:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:10:17,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:17,286 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:17,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:10:17,286 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash 13322467, now seen corresponding path program 4 times [2020-10-15 00:10:17,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:17,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180957972] [2020-10-15 00:10:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:17,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:22,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:10:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:22,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:22,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:22,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:22,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:10:22,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180957972] [2020-10-15 00:10:22,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:22,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:22,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060422555] [2020-10-15 00:10:22,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:22,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:22,550 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 15 states. [2020-10-15 00:10:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:24,046 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2020-10-15 00:10:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:10:24,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-15 00:10:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:24,051 INFO L225 Difference]: With dead ends: 219 [2020-10-15 00:10:24,051 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 00:10:24,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:10:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 00:10:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 136. [2020-10-15 00:10:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 00:10:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-10-15 00:10:24,095 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 37 [2020-10-15 00:10:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:24,095 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-10-15 00:10:24,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-10-15 00:10:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:10:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:24,097 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:24,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:10:24,098 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1858975791, now seen corresponding path program 5 times [2020-10-15 00:10:24,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:24,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286729298] [2020-10-15 00:10:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:28,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:29,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:10:29,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:29,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:10:29,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:29,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:29,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:29,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286729298] [2020-10-15 00:10:29,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:10:29,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883687512] [2020-10-15 00:10:29,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:10:29,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:10:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:10:29,509 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 18 states. [2020-10-15 00:10:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:30,587 INFO L93 Difference]: Finished difference Result 193 states and 244 transitions. [2020-10-15 00:10:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:10:30,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-15 00:10:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:30,590 INFO L225 Difference]: With dead ends: 193 [2020-10-15 00:10:30,590 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 00:10:30,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:10:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 00:10:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 146. [2020-10-15 00:10:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 00:10:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2020-10-15 00:10:30,612 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 37 [2020-10-15 00:10:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:30,612 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2020-10-15 00:10:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:10:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2020-10-15 00:10:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:10:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:30,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:30,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:10:30,613 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -221878570, now seen corresponding path program 3 times [2020-10-15 00:10:30,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:30,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449060102] [2020-10-15 00:10:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:30,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:30,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:10:30,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:31,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:31,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:10:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:10:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449060102] [2020-10-15 00:10:31,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:31,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:31,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094221085] [2020-10-15 00:10:31,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:31,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:31,087 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand 15 states. [2020-10-15 00:10:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:31,961 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2020-10-15 00:10:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:10:31,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-15 00:10:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:31,966 INFO L225 Difference]: With dead ends: 182 [2020-10-15 00:10:31,966 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 00:10:31,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:10:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 00:10:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2020-10-15 00:10:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 00:10:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2020-10-15 00:10:31,990 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 39 [2020-10-15 00:10:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:31,990 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2020-10-15 00:10:31,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2020-10-15 00:10:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:10:31,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:31,991 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:31,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:10:31,991 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1686802267, now seen corresponding path program 1 times [2020-10-15 00:10:31,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:31,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415773840] [2020-10-15 00:10:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:32,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:35,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:10:35,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3389 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:10:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:35,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:35,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:35,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:10:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:35,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:35,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415773840] [2020-10-15 00:10:35,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:35,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:10:35,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503146606] [2020-10-15 00:10:35,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:10:35,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:35,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:10:35,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:10:35,932 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand 18 states. [2020-10-15 00:10:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:36,976 INFO L93 Difference]: Finished difference Result 195 states and 246 transitions. [2020-10-15 00:10:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:10:36,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-15 00:10:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:36,978 INFO L225 Difference]: With dead ends: 195 [2020-10-15 00:10:36,978 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 00:10:36,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:10:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 00:10:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2020-10-15 00:10:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 00:10:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2020-10-15 00:10:37,007 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 39 [2020-10-15 00:10:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:37,009 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2020-10-15 00:10:37,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:10:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2020-10-15 00:10:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:10:37,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:37,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:37,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:10:37,011 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:37,011 INFO L82 PathProgramCache]: Analyzing trace with hash -141338470, now seen corresponding path program 4 times [2020-10-15 00:10:37,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:37,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029250345] [2020-10-15 00:10:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:10:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:10:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:37,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:37,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:37,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:37,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:37,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:37,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:37,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-15 00:10:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:37,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:37,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:37,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:37,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:37,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:37,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:37,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:37,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-15 00:10:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:37,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:37,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:37,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:10:37,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029250345] [2020-10-15 00:10:37,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:37,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:10:37,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387206705] [2020-10-15 00:10:37,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:10:37,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:10:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:10:37,327 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 10 states. [2020-10-15 00:10:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:37,705 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2020-10-15 00:10:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:10:37,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-15 00:10:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:37,708 INFO L225 Difference]: With dead ends: 242 [2020-10-15 00:10:37,708 INFO L226 Difference]: Without dead ends: 211 [2020-10-15 00:10:37,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-15 00:10:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2020-10-15 00:10:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 00:10:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2020-10-15 00:10:37,738 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 41 [2020-10-15 00:10:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:37,738 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2020-10-15 00:10:37,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:10:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2020-10-15 00:10:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:10:37,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:37,740 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:37,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:10:37,740 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1624008363, now seen corresponding path program 6 times [2020-10-15 00:10:37,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:37,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825734709] [2020-10-15 00:10:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:42,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:42,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:42,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:10:42,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-15 00:10:42,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-15 00:10:42,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:42,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:42,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:42,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:42,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:10:42,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:43,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:43,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:43,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:43,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:43,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:43,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:43,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825734709] [2020-10-15 00:10:43,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:43,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:43,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82651023] [2020-10-15 00:10:43,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:43,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:43,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:43,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:43,259 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand 16 states. [2020-10-15 00:10:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:46,575 INFO L93 Difference]: Finished difference Result 372 states and 478 transitions. [2020-10-15 00:10:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:10:46,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-15 00:10:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:46,578 INFO L225 Difference]: With dead ends: 372 [2020-10-15 00:10:46,578 INFO L226 Difference]: Without dead ends: 370 [2020-10-15 00:10:46,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:10:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-15 00:10:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 220. [2020-10-15 00:10:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-15 00:10:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 286 transitions. [2020-10-15 00:10:46,609 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 286 transitions. Word has length 40 [2020-10-15 00:10:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:46,610 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 286 transitions. [2020-10-15 00:10:46,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 286 transitions. [2020-10-15 00:10:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:10:46,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:46,611 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:46,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:10:46,611 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 561523681, now seen corresponding path program 7 times [2020-10-15 00:10:46,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:46,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804168994] [2020-10-15 00:10:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:46,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:50,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:10:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:51,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:51,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:51,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:51,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:51,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:51,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:51,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:51,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:51,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:10:51,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804168994] [2020-10-15 00:10:51,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:51,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:51,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236656429] [2020-10-15 00:10:51,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:51,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:51,945 INFO L87 Difference]: Start difference. First operand 220 states and 286 transitions. Second operand 16 states. [2020-10-15 00:10:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:53,925 INFO L93 Difference]: Finished difference Result 374 states and 480 transitions. [2020-10-15 00:10:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:10:53,927 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-15 00:10:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:53,930 INFO L225 Difference]: With dead ends: 374 [2020-10-15 00:10:53,930 INFO L226 Difference]: Without dead ends: 372 [2020-10-15 00:10:53,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=2473, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:10:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-15 00:10:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 217. [2020-10-15 00:10:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-15 00:10:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 282 transitions. [2020-10-15 00:10:53,966 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 282 transitions. Word has length 40 [2020-10-15 00:10:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:53,967 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 282 transitions. [2020-10-15 00:10:53,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 282 transitions. [2020-10-15 00:10:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:10:53,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:53,968 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:53,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:10:53,969 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 706685066, now seen corresponding path program 2 times [2020-10-15 00:10:53,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:53,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517021034] [2020-10-15 00:10:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:10:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:10:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1364 [2020-10-15 00:10:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:10:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:55,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:55,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:55,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:55,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:55,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-15 00:10:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:55,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:55,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:55,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:55,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:55,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:55,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:55,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:55,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517021034] [2020-10-15 00:10:55,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:55,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:55,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793248776] [2020-10-15 00:10:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:55,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:55,668 INFO L87 Difference]: Start difference. First operand 217 states and 282 transitions. Second operand 16 states. [2020-10-15 00:10:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:57,070 INFO L93 Difference]: Finished difference Result 333 states and 427 transitions. [2020-10-15 00:10:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:10:57,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-15 00:10:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:57,074 INFO L225 Difference]: With dead ends: 333 [2020-10-15 00:10:57,075 INFO L226 Difference]: Without dead ends: 331 [2020-10-15 00:10:57,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:10:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-15 00:10:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 248. [2020-10-15 00:10:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-15 00:10:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 320 transitions. [2020-10-15 00:10:57,122 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 320 transitions. Word has length 42 [2020-10-15 00:10:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:57,123 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 320 transitions. [2020-10-15 00:10:57,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 320 transitions. [2020-10-15 00:10:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:10:57,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:57,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:57,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:10:57,125 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash -115352368, now seen corresponding path program 3 times [2020-10-15 00:10:57,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:57,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12856998] [2020-10-15 00:10:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:57,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:10:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:10:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:57,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:57,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:57,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:57,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:57,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:57,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:57,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-15 00:10:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:57,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:57,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:57,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:57,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:57,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:57,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:57,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:10:57,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12856998] [2020-10-15 00:10:57,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:57,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:57,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777826973] [2020-10-15 00:10:57,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:57,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:57,645 INFO L87 Difference]: Start difference. First operand 248 states and 320 transitions. Second operand 15 states. [2020-10-15 00:10:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:58,468 INFO L93 Difference]: Finished difference Result 281 states and 361 transitions. [2020-10-15 00:10:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:10:58,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-15 00:10:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:58,471 INFO L225 Difference]: With dead ends: 281 [2020-10-15 00:10:58,471 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 00:10:58,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:10:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 00:10:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 262. [2020-10-15 00:10:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-15 00:10:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 340 transitions. [2020-10-15 00:10:58,511 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 340 transitions. Word has length 42 [2020-10-15 00:10:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:58,512 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 340 transitions. [2020-10-15 00:10:58,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 340 transitions. [2020-10-15 00:10:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:10:58,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:58,513 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:58,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:10:58,514 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:58,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1287758105, now seen corresponding path program 2 times [2020-10-15 00:10:58,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:58,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286093158] [2020-10-15 00:10:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:58,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:59,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:11:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:04,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:04,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:04,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:04,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-15 00:11:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:04,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:04,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:04,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:04,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286093158] [2020-10-15 00:11:04,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:04,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:11:04,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381114299] [2020-10-15 00:11:04,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:11:04,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:04,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:11:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:11:04,138 INFO L87 Difference]: Start difference. First operand 262 states and 340 transitions. Second operand 18 states. [2020-10-15 00:11:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:05,121 INFO L93 Difference]: Finished difference Result 273 states and 352 transitions. [2020-10-15 00:11:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:11:05,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-15 00:11:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:05,124 INFO L225 Difference]: With dead ends: 273 [2020-10-15 00:11:05,124 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 00:11:05,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:11:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 00:11:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 231. [2020-10-15 00:11:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-15 00:11:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 303 transitions. [2020-10-15 00:11:05,159 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 303 transitions. Word has length 42 [2020-10-15 00:11:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:05,159 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 303 transitions. [2020-10-15 00:11:05,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:11:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 303 transitions. [2020-10-15 00:11:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:11:05,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:05,160 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:05,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:11:05,161 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1391660577, now seen corresponding path program 8 times [2020-10-15 00:11:05,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:05,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772625570] [2020-10-15 00:11:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:05,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:05,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:06,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:11:06,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:11:06,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-15 00:11:06,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:06,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:11:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:06,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:11:06,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:06,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:06,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:06,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:06,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:06,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:06,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 41 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:11:06,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772625570] [2020-10-15 00:11:06,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:06,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:11:06,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077609873] [2020-10-15 00:11:06,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:11:06,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:11:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:11:06,535 INFO L87 Difference]: Start difference. First operand 231 states and 303 transitions. Second operand 11 states. [2020-10-15 00:11:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:07,059 INFO L93 Difference]: Finished difference Result 350 states and 457 transitions. [2020-10-15 00:11:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:11:07,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-15 00:11:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:07,062 INFO L225 Difference]: With dead ends: 350 [2020-10-15 00:11:07,062 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 00:11:07,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:11:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 00:11:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 228. [2020-10-15 00:11:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-15 00:11:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 297 transitions. [2020-10-15 00:11:07,098 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 297 transitions. Word has length 43 [2020-10-15 00:11:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:07,098 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 297 transitions. [2020-10-15 00:11:07,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:11:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 297 transitions. [2020-10-15 00:11:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:11:07,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:07,100 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:07,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:11:07,100 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash -420550954, now seen corresponding path program 9 times [2020-10-15 00:11:07,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:07,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902362188] [2020-10-15 00:11:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:11:12,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:12,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:12,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:12,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:12,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:12,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 00:11:12,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902362188] [2020-10-15 00:11:12,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:12,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:11:12,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001596320] [2020-10-15 00:11:12,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:11:12,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:11:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:11:12,175 INFO L87 Difference]: Start difference. First operand 228 states and 297 transitions. Second operand 9 states. [2020-10-15 00:11:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:12,411 INFO L93 Difference]: Finished difference Result 385 states and 502 transitions. [2020-10-15 00:11:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:11:12,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-15 00:11:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:12,413 INFO L225 Difference]: With dead ends: 385 [2020-10-15 00:11:12,413 INFO L226 Difference]: Without dead ends: 265 [2020-10-15 00:11:12,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:11:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-15 00:11:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 217. [2020-10-15 00:11:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-15 00:11:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2020-10-15 00:11:12,445 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 43 [2020-10-15 00:11:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:12,446 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2020-10-15 00:11:12,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:11:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2020-10-15 00:11:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 00:11:12,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:12,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:12,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:11:12,447 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -338388394, now seen corresponding path program 4 times [2020-10-15 00:11:12,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:12,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628185795] [2020-10-15 00:11:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2722 [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:15,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:11:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:11:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:15,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:15,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:15,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-15 00:11:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:15,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:15,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:15,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:15,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:15,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628185795] [2020-10-15 00:11:15,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:15,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:11:15,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583389927] [2020-10-15 00:11:15,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:11:15,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:11:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:11:15,472 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand 16 states. [2020-10-15 00:11:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:17,088 INFO L93 Difference]: Finished difference Result 323 states and 404 transitions. [2020-10-15 00:11:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:11:17,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-15 00:11:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:17,092 INFO L225 Difference]: With dead ends: 323 [2020-10-15 00:11:17,092 INFO L226 Difference]: Without dead ends: 321 [2020-10-15 00:11:17,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:11:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-15 00:11:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 221. [2020-10-15 00:11:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-15 00:11:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 280 transitions. [2020-10-15 00:11:17,129 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 280 transitions. Word has length 45 [2020-10-15 00:11:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:17,130 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 280 transitions. [2020-10-15 00:11:17,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:11:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 280 transitions. [2020-10-15 00:11:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 00:11:17,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:17,131 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:17,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:11:17,131 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -433551720, now seen corresponding path program 3 times [2020-10-15 00:11:17,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:17,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512906992] [2020-10-15 00:11:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:22,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:11:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:11:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:22,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:22,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:22,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:22,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:22,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:22,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:22,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:22,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:22,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-15 00:11:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:22,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:22,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:22,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:11:22,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:22,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:22,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:22,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512906992] [2020-10-15 00:11:22,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:22,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:11:22,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651830675] [2020-10-15 00:11:22,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:11:22,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:22,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:11:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:11:22,882 INFO L87 Difference]: Start difference. First operand 221 states and 280 transitions. Second operand 19 states. [2020-10-15 00:11:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:23,973 INFO L93 Difference]: Finished difference Result 256 states and 321 transitions. [2020-10-15 00:11:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:11:23,974 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-15 00:11:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:23,977 INFO L225 Difference]: With dead ends: 256 [2020-10-15 00:11:23,977 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 00:11:23,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:11:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 00:11:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 224. [2020-10-15 00:11:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-15 00:11:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 283 transitions. [2020-10-15 00:11:24,014 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 283 transitions. Word has length 45 [2020-10-15 00:11:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:24,015 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 283 transitions. [2020-10-15 00:11:24,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:11:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 283 transitions. [2020-10-15 00:11:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:11:24,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:24,016 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:24,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:11:24,016 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -973028083, now seen corresponding path program 5 times [2020-10-15 00:11:24,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:24,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791864881] [2020-10-15 00:11:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:11:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:11:24,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:24,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:24,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:24,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:24,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-15 00:11:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:24,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-15 00:11:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:24,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:11:24,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791864881] [2020-10-15 00:11:24,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:24,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:11:24,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416500978] [2020-10-15 00:11:24,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:11:24,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:11:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:11:24,676 INFO L87 Difference]: Start difference. First operand 224 states and 283 transitions. Second operand 16 states. [2020-10-15 00:11:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:25,593 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-10-15 00:11:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:11:25,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-15 00:11:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:25,597 INFO L225 Difference]: With dead ends: 286 [2020-10-15 00:11:25,597 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 00:11:25,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:11:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 00:11:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 256. [2020-10-15 00:11:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 00:11:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 322 transitions. [2020-10-15 00:11:25,636 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 322 transitions. Word has length 47 [2020-10-15 00:11:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:25,637 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 322 transitions. [2020-10-15 00:11:25,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:11:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 322 transitions. [2020-10-15 00:11:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:11:25,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:25,638 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:25,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:11:25,638 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 704467586, now seen corresponding path program 10 times [2020-10-15 00:11:25,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:25,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107368807] [2020-10-15 00:11:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:25,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:25,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:25,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:28,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:29,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:11:30,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:30,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:30,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:30,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107368807] [2020-10-15 00:11:30,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:30,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:11:30,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887167782] [2020-10-15 00:11:30,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:11:30,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:11:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:11:30,758 INFO L87 Difference]: Start difference. First operand 256 states and 322 transitions. Second operand 12 states. [2020-10-15 00:11:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:31,529 INFO L93 Difference]: Finished difference Result 558 states and 711 transitions. [2020-10-15 00:11:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:11:31,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-15 00:11:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:31,533 INFO L225 Difference]: With dead ends: 558 [2020-10-15 00:11:31,533 INFO L226 Difference]: Without dead ends: 333 [2020-10-15 00:11:31,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:11:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-15 00:11:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 249. [2020-10-15 00:11:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-15 00:11:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2020-10-15 00:11:31,568 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 46 [2020-10-15 00:11:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:31,568 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2020-10-15 00:11:31,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:11:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2020-10-15 00:11:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:11:31,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:31,569 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:31,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:11:31,569 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:31,570 INFO L82 PathProgramCache]: Analyzing trace with hash 840845576, now seen corresponding path program 11 times [2020-10-15 00:11:31,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:31,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364147020] [2020-10-15 00:11:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:31,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:35,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:36,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:36,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:11:36,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:36,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:36,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:36,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:36,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:36,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364147020] [2020-10-15 00:11:36,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:36,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:11:36,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070203428] [2020-10-15 00:11:36,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:11:36,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:11:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:11:36,923 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand 17 states. [2020-10-15 00:11:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:39,594 INFO L93 Difference]: Finished difference Result 396 states and 485 transitions. [2020-10-15 00:11:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:11:39,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-15 00:11:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:39,599 INFO L225 Difference]: With dead ends: 396 [2020-10-15 00:11:39,599 INFO L226 Difference]: Without dead ends: 394 [2020-10-15 00:11:39,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=284, Invalid=2472, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:11:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-15 00:11:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 296. [2020-10-15 00:11:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-15 00:11:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-10-15 00:11:39,670 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 46 [2020-10-15 00:11:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:39,670 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-10-15 00:11:39,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:11:39,671 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-10-15 00:11:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:11:39,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:39,673 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:39,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:11:39,673 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 665833150, now seen corresponding path program 12 times [2020-10-15 00:11:39,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:39,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192705134] [2020-10-15 00:11:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:39,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:44,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:44,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:11:44,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-15 00:11:44,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:44,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:44,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:11:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:11:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:45,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:45,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192705134] [2020-10-15 00:11:45,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:45,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:11:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191051301] [2020-10-15 00:11:45,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:11:45,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:11:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:11:45,285 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 20 states. [2020-10-15 00:11:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:46,928 INFO L93 Difference]: Finished difference Result 358 states and 437 transitions. [2020-10-15 00:11:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:11:46,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-15 00:11:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:46,931 INFO L225 Difference]: With dead ends: 358 [2020-10-15 00:11:46,931 INFO L226 Difference]: Without dead ends: 356 [2020-10-15 00:11:46,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:11:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-15 00:11:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 315. [2020-10-15 00:11:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-15 00:11:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 386 transitions. [2020-10-15 00:11:47,000 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 386 transitions. Word has length 46 [2020-10-15 00:11:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:47,001 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 386 transitions. [2020-10-15 00:11:47,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:11:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 386 transitions. [2020-10-15 00:11:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:11:47,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:47,002 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:47,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:11:47,002 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1165217708, now seen corresponding path program 13 times [2020-10-15 00:11:47,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:47,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527014846] [2020-10-15 00:11:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:47,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:49,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:49,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:51,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:51,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:52,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:11:52,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-15 00:11:52,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:11:52,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:52,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:52,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:11:52,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:52,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:11:52,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:52,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:52,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-15 00:11:52,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527014846] [2020-10-15 00:11:52,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:52,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:11:52,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843769569] [2020-10-15 00:11:52,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:11:52,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:11:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:11:52,641 INFO L87 Difference]: Start difference. First operand 315 states and 386 transitions. Second operand 18 states. [2020-10-15 00:11:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:54,424 INFO L93 Difference]: Finished difference Result 430 states and 524 transitions. [2020-10-15 00:11:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:11:54,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-15 00:11:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:54,428 INFO L225 Difference]: With dead ends: 430 [2020-10-15 00:11:54,428 INFO L226 Difference]: Without dead ends: 428 [2020-10-15 00:11:54,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:11:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-15 00:11:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 345. [2020-10-15 00:11:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 00:11:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 424 transitions. [2020-10-15 00:11:54,485 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 424 transitions. Word has length 46 [2020-10-15 00:11:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:54,486 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 424 transitions. [2020-10-15 00:11:54,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:11:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 424 transitions. [2020-10-15 00:11:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:11:54,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:54,487 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:54,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:11:54,488 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:54,488 INFO L82 PathProgramCache]: Analyzing trace with hash 756400788, now seen corresponding path program 14 times [2020-10-15 00:11:54,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:54,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084501194] [2020-10-15 00:11:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:11:59,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-15 00:11:59,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 00:11:59,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:11:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:11:59,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:00,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:00,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 00:12:00,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084501194] [2020-10-15 00:12:00,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:00,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:12:00,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476697598] [2020-10-15 00:12:00,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:12:00,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:12:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:12:00,234 INFO L87 Difference]: Start difference. First operand 345 states and 424 transitions. Second operand 17 states. [2020-10-15 00:12:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:03,417 INFO L93 Difference]: Finished difference Result 462 states and 565 transitions. [2020-10-15 00:12:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:12:03,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-15 00:12:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:03,420 INFO L225 Difference]: With dead ends: 462 [2020-10-15 00:12:03,421 INFO L226 Difference]: Without dead ends: 460 [2020-10-15 00:12:03,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=346, Invalid=2846, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:12:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-15 00:12:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 340. [2020-10-15 00:12:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 00:12:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 418 transitions. [2020-10-15 00:12:03,493 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 418 transitions. Word has length 46 [2020-10-15 00:12:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:03,493 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 418 transitions. [2020-10-15 00:12:03,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:12:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 418 transitions. [2020-10-15 00:12:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:12:03,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:03,495 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:03,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:12:03,496 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2065220408, now seen corresponding path program 15 times [2020-10-15 00:12:03,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:03,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296849568] [2020-10-15 00:12:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:03,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:03,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:03,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:05,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:05,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:06,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:06,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:06,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:07,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:07,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:08,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:08,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:08,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:08,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:12:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:09,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:09,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:09,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:09,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:09,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:09,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:09,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:09,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:09,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:09,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:09,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:09,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:12:09,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296849568] [2020-10-15 00:12:09,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:09,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:12:09,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758606342] [2020-10-15 00:12:09,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:12:09,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:12:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:12:09,391 INFO L87 Difference]: Start difference. First operand 340 states and 418 transitions. Second operand 20 states. [2020-10-15 00:12:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:11,482 INFO L93 Difference]: Finished difference Result 430 states and 526 transitions. [2020-10-15 00:12:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:12:11,483 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-15 00:12:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:11,485 INFO L225 Difference]: With dead ends: 430 [2020-10-15 00:12:11,485 INFO L226 Difference]: Without dead ends: 428 [2020-10-15 00:12:11,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:12:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-15 00:12:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 331. [2020-10-15 00:12:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-15 00:12:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 406 transitions. [2020-10-15 00:12:11,570 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 406 transitions. Word has length 46 [2020-10-15 00:12:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:11,571 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 406 transitions. [2020-10-15 00:12:11,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:12:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 406 transitions. [2020-10-15 00:12:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:12:11,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:11,572 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:11,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:12:11,573 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash 694110839, now seen corresponding path program 5 times [2020-10-15 00:12:11,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:11,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566252811] [2020-10-15 00:12:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:11,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:13,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:13,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:14,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:12:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:12:16,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:17,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:17,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:17,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:17,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:17,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:17,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:17,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:17,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:17,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:17,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:17,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:12:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:17,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:17,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:17,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:17,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:17,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:17,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:17,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:17,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:17,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:17,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:17,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:17,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566252811] [2020-10-15 00:12:17,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:17,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:12:17,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422812309] [2020-10-15 00:12:17,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:12:17,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:17,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:12:17,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:12:17,237 INFO L87 Difference]: Start difference. First operand 331 states and 406 transitions. Second operand 20 states. [2020-10-15 00:12:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:18,757 INFO L93 Difference]: Finished difference Result 423 states and 516 transitions. [2020-10-15 00:12:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:12:18,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-15 00:12:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:18,761 INFO L225 Difference]: With dead ends: 423 [2020-10-15 00:12:18,762 INFO L226 Difference]: Without dead ends: 421 [2020-10-15 00:12:18,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:12:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-15 00:12:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 371. [2020-10-15 00:12:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-15 00:12:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 454 transitions. [2020-10-15 00:12:18,840 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 454 transitions. Word has length 48 [2020-10-15 00:12:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:18,840 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 454 transitions. [2020-10-15 00:12:18,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:12:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 454 transitions. [2020-10-15 00:12:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:12:18,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:18,841 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:18,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:12:18,842 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash -127926595, now seen corresponding path program 6 times [2020-10-15 00:12:18,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:18,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002532740] [2020-10-15 00:12:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:21,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:21,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:12:21,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2826 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:12:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:21,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:21,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:21,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:21,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:21,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:21,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:21,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:12:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:21,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:21,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:21,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:21,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:21,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:21,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:21,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:12:21,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002532740] [2020-10-15 00:12:21,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:21,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:12:21,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529526089] [2020-10-15 00:12:21,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:12:21,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:12:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:12:21,998 INFO L87 Difference]: Start difference. First operand 371 states and 454 transitions. Second operand 17 states. [2020-10-15 00:12:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:24,043 INFO L93 Difference]: Finished difference Result 457 states and 557 transitions. [2020-10-15 00:12:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:12:24,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-15 00:12:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:24,047 INFO L225 Difference]: With dead ends: 457 [2020-10-15 00:12:24,047 INFO L226 Difference]: Without dead ends: 455 [2020-10-15 00:12:24,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:12:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-15 00:12:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 389. [2020-10-15 00:12:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-15 00:12:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 478 transitions. [2020-10-15 00:12:24,152 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 478 transitions. Word has length 48 [2020-10-15 00:12:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:24,152 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 478 transitions. [2020-10-15 00:12:24,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:12:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 478 transitions. [2020-10-15 00:12:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:12:24,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:24,154 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:24,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:12:24,155 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1592850292, now seen corresponding path program 4 times [2020-10-15 00:12:24,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:24,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688836067] [2020-10-15 00:12:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:24,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:24,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:25,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:26,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:26,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:29,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:29,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:12:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:12:29,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:29,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:29,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:29,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:12:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:29,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:29,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:29,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688836067] [2020-10-15 00:12:29,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:29,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:12:29,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216345885] [2020-10-15 00:12:29,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:12:29,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:12:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:12:29,888 INFO L87 Difference]: Start difference. First operand 389 states and 478 transitions. Second operand 21 states. [2020-10-15 00:12:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:31,904 INFO L93 Difference]: Finished difference Result 475 states and 580 transitions. [2020-10-15 00:12:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:12:31,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-15 00:12:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:31,908 INFO L225 Difference]: With dead ends: 475 [2020-10-15 00:12:31,908 INFO L226 Difference]: Without dead ends: 473 [2020-10-15 00:12:31,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:12:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-15 00:12:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 418. [2020-10-15 00:12:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-15 00:12:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 511 transitions. [2020-10-15 00:12:32,004 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 511 transitions. Word has length 48 [2020-10-15 00:12:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:32,004 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 511 transitions. [2020-10-15 00:12:32,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:12:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 511 transitions. [2020-10-15 00:12:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:12:32,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:32,006 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:32,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:12:32,006 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1235076262, now seen corresponding path program 5 times [2020-10-15 00:12:32,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:32,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935758805] [2020-10-15 00:12:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:32,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:33,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:35,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:35,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:35,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:37,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:12:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:12:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:37,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:37,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:37,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:37,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:37,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:37,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:37,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-15 00:12:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:37,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:37,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:37,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:37,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:37,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:37,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:37,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:12:37,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935758805] [2020-10-15 00:12:37,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:37,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:12:37,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238636232] [2020-10-15 00:12:37,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:12:37,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:12:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:12:37,627 INFO L87 Difference]: Start difference. First operand 418 states and 511 transitions. Second operand 19 states. [2020-10-15 00:12:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:38,932 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2020-10-15 00:12:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:12:38,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-15 00:12:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:38,935 INFO L225 Difference]: With dead ends: 438 [2020-10-15 00:12:38,935 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 00:12:38,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:12:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 00:12:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2020-10-15 00:12:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-15 00:12:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 446 transitions. [2020-10-15 00:12:39,008 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 446 transitions. Word has length 48 [2020-10-15 00:12:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:39,009 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 446 transitions. [2020-10-15 00:12:39,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:12:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 446 transitions. [2020-10-15 00:12:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:12:39,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:39,010 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:39,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:12:39,010 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash -47803711, now seen corresponding path program 7 times [2020-10-15 00:12:39,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:39,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420567853] [2020-10-15 00:12:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:39,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:39,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:12:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:39,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:39,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:39,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:39,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:39,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-15 00:12:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:39,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:39,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:39,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:39,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:39,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:39,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-15 00:12:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:12:39,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:12:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:12:39,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420567853] [2020-10-15 00:12:39,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:39,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:12:39,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555125554] [2020-10-15 00:12:39,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:12:39,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:12:39,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:12:39,576 INFO L87 Difference]: Start difference. First operand 365 states and 446 transitions. Second operand 16 states. [2020-10-15 00:12:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:40,664 INFO L93 Difference]: Finished difference Result 409 states and 499 transitions. [2020-10-15 00:12:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:12:40,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-15 00:12:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:40,669 INFO L225 Difference]: With dead ends: 409 [2020-10-15 00:12:40,669 INFO L226 Difference]: Without dead ends: 407 [2020-10-15 00:12:40,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:12:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-15 00:12:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 383. [2020-10-15 00:12:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-15 00:12:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 467 transitions. [2020-10-15 00:12:40,776 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 467 transitions. Word has length 50 [2020-10-15 00:12:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:40,778 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 467 transitions. [2020-10-15 00:12:40,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:12:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 467 transitions. [2020-10-15 00:12:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:12:40,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:40,780 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:40,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:12:40,781 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1001859540, now seen corresponding path program 16 times [2020-10-15 00:12:40,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:40,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467749835] [2020-10-15 00:12:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:40,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:41,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:43,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:43,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:12:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:12:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:46,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:46,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:46,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:46,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:46,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:46,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467749835] [2020-10-15 00:12:46,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:46,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:12:46,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285147653] [2020-10-15 00:12:46,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:12:46,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:12:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:12:46,469 INFO L87 Difference]: Start difference. First operand 383 states and 467 transitions. Second operand 18 states. [2020-10-15 00:12:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:52,353 INFO L93 Difference]: Finished difference Result 860 states and 1074 transitions. [2020-10-15 00:12:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-15 00:12:52,354 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-15 00:12:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:52,359 INFO L225 Difference]: With dead ends: 860 [2020-10-15 00:12:52,359 INFO L226 Difference]: Without dead ends: 858 [2020-10-15 00:12:52,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=385, Invalid=4871, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:12:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-10-15 00:12:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 514. [2020-10-15 00:12:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-15 00:12:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 637 transitions. [2020-10-15 00:12:52,456 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 637 transitions. Word has length 49 [2020-10-15 00:12:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:52,456 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 637 transitions. [2020-10-15 00:12:52,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:12:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 637 transitions. [2020-10-15 00:12:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:12:52,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:52,458 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:52,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:12:52,459 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:52,459 INFO L82 PathProgramCache]: Analyzing trace with hash 243471934, now seen corresponding path program 17 times [2020-10-15 00:12:52,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:52,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132849133] [2020-10-15 00:12:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:54,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:54,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:54,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:54,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:56,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:57,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:12:57,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:58,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:58,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:12:58,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132849133] [2020-10-15 00:12:58,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:58,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:12:58,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341172066] [2020-10-15 00:12:58,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:12:58,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:12:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:12:58,462 INFO L87 Difference]: Start difference. First operand 514 states and 637 transitions. Second operand 20 states. [2020-10-15 00:13:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:01,020 INFO L93 Difference]: Finished difference Result 622 states and 770 transitions. [2020-10-15 00:13:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:13:01,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-15 00:13:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:01,026 INFO L225 Difference]: With dead ends: 622 [2020-10-15 00:13:01,026 INFO L226 Difference]: Without dead ends: 620 [2020-10-15 00:13:01,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:13:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-15 00:13:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 542. [2020-10-15 00:13:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-15 00:13:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 672 transitions. [2020-10-15 00:13:01,114 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 672 transitions. Word has length 49 [2020-10-15 00:13:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:01,114 INFO L479 AbstractCegarLoop]: Abstraction has 542 states and 672 transitions. [2020-10-15 00:13:01,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:13:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 672 transitions. [2020-10-15 00:13:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:13:01,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:01,116 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:01,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:13:01,117 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1868628086, now seen corresponding path program 18 times [2020-10-15 00:13:01,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:01,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21451627] [2020-10-15 00:13:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:03,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:03,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:03,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:04,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:05,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:06,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:13:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:13:06,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:07,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:07,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:07,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:07,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:07,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:07,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:07,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:13:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 94 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-15 00:13:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21451627] [2020-10-15 00:13:07,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:07,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:13:07,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338466487] [2020-10-15 00:13:07,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:13:07,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:13:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:13:07,023 INFO L87 Difference]: Start difference. First operand 542 states and 672 transitions. Second operand 18 states. [2020-10-15 00:13:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:09,665 INFO L93 Difference]: Finished difference Result 743 states and 916 transitions. [2020-10-15 00:13:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:13:09,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-15 00:13:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:09,668 INFO L225 Difference]: With dead ends: 743 [2020-10-15 00:13:09,668 INFO L226 Difference]: Without dead ends: 741 [2020-10-15 00:13:09,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:13:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-10-15 00:13:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 591. [2020-10-15 00:13:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-15 00:13:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 738 transitions. [2020-10-15 00:13:09,763 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 738 transitions. Word has length 49 [2020-10-15 00:13:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:09,763 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 738 transitions. [2020-10-15 00:13:09,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:13:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 738 transitions. [2020-10-15 00:13:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 00:13:09,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:09,765 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:09,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:13:09,765 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1275030199, now seen corresponding path program 8 times [2020-10-15 00:13:09,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:09,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553487175] [2020-10-15 00:13:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:12,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:13:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:13:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:15,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:15,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:15,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:15,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-15 00:13:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:15,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:15,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:13:15,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:13:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:13:15,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553487175] [2020-10-15 00:13:15,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:15,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:13:15,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81261509] [2020-10-15 00:13:15,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:13:15,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:13:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:13:15,149 INFO L87 Difference]: Start difference. First operand 591 states and 738 transitions. Second operand 18 states.