/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:02:34,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:02:34,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:02:34,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:02:34,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:02:34,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:02:34,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:02:34,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:02:34,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:02:34,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:02:34,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:02:34,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:02:34,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:02:34,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:02:34,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:02:34,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:02:34,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:02:34,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:02:34,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:02:34,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:02:35,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:02:35,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:02:35,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:02:35,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:02:35,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:02:35,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:02:35,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:02:35,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:02:35,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:02:35,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:02:35,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:02:35,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:02:35,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:02:35,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:02:35,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:02:35,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:02:35,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:02:35,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:02:35,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:02:35,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:02:35,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:02:35,035 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 [2020-10-14 00:02:35,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:02:35,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:02:35,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:02:35,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:02:35,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:02:35,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:02:35,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:02:35,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:02:35,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:02:35,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:02:35,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:02:35,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:02:35,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:02:35,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:02:35,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:02:35,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:02:35,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:02:35,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:02:35,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:02:35,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:02:35,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:02:35,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:02:35,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:02:35,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:02:35,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:02:35,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:02:35,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:02:35,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:02:35,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:02:35,081 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 00:02:35,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:02:35,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:02:35,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:02:35,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:02:35,399 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:02:35,400 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-14 00:02:35,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3836b507/7e32da4d0bb048cf89a450490f875cc8/FLAG24c82be24 [2020-10-14 00:02:35,903 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:02:35,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-14 00:02:35,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3836b507/7e32da4d0bb048cf89a450490f875cc8/FLAG24c82be24 [2020-10-14 00:02:36,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3836b507/7e32da4d0bb048cf89a450490f875cc8 [2020-10-14 00:02:36,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:02:36,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:02:36,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:02:36,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:02:36,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:02:36,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63983835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36, skipping insertion in model container [2020-10-14 00:02:36,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:02:36,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:02:36,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:02:36,497 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:02:36,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:02:36,619 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:02:36,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36 WrapperNode [2020-10-14 00:02:36,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:02:36,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:02:36,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:02:36,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:02:36,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (1/1) ... [2020-10-14 00:02:36,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:02:36,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:02:36,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:02:36,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:02:36,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (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 [2020-10-14 00:02:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:02:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:02:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:02:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:02:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:02:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:02:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 00:02:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 00:02:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 00:02:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:02:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 00:02:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:02:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 00:02:37,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:02:37,023 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 00:02:37,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:02:37 BoogieIcfgContainer [2020-10-14 00:02:37,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:02:37,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:02:37,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:02:37,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:02:37,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:02:36" (1/3) ... [2020-10-14 00:02:37,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43df7656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:02:37, skipping insertion in model container [2020-10-14 00:02:37,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:02:36" (2/3) ... [2020-10-14 00:02:37,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43df7656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:02:37, skipping insertion in model container [2020-10-14 00:02:37,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:02:37" (3/3) ... [2020-10-14 00:02:37,043 INFO L109 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2020-10-14 00:02:37,068 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:02:37,085 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:02:37,106 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:02:37,126 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:02:37,127 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:02:37,127 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:02:37,127 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:02:37,127 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:02:37,127 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:02:37,127 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:02:37,127 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:02:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-14 00:02:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:02:37,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:37,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:37,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 554320188, now seen corresponding path program 1 times [2020-10-14 00:02:37,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:37,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233817770] [2020-10-14 00:02:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:37,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:37,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:02:38,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:38,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-14 00:02:38,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:38,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:02:38,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:38,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:02:38,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 00:02:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:38,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:38,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:38,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:38,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 00:02:38,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:38,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:38,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:02:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:38,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233817770] [2020-10-14 00:02:38,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:02:38,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:02:38,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074249320] [2020-10-14 00:02:38,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:02:38,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:02:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:02:38,206 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-14 00:02:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:38,439 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2020-10-14 00:02:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:02:38,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 00:02:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:38,453 INFO L225 Difference]: With dead ends: 63 [2020-10-14 00:02:38,453 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 00:02:38,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:02:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 00:02:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-14 00:02:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 00:02:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-14 00:02:38,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2020-10-14 00:02:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:38,506 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-14 00:02:38,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:02:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-14 00:02:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 00:02:38,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:38,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:38,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:02:38,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2023958242, now seen corresponding path program 1 times [2020-10-14 00:02:38,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:38,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368738813] [2020-10-14 00:02:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:38,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 00:02:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-14 00:02:39,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:39,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:02:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 00:02:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:02:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:39,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:39,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:02:39,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:39,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:39,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:39,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:39,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:39,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368738813] [2020-10-14 00:02:39,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:02:39,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:02:39,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542347714] [2020-10-14 00:02:39,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:02:39,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:39,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:02:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:02:39,456 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-10-14 00:02:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:39,584 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-10-14 00:02:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 00:02:39,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 00:02:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:39,586 INFO L225 Difference]: With dead ends: 61 [2020-10-14 00:02:39,587 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 00:02:39,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:02:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 00:02:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-10-14 00:02:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 00:02:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-14 00:02:39,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2020-10-14 00:02:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:39,596 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-14 00:02:39,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:02:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-14 00:02:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 00:02:39,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:39,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:39,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:02:39,598 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152228, now seen corresponding path program 1 times [2020-10-14 00:02:39,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:39,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963548579] [2020-10-14 00:02:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:40,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:40,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 00:02:40,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-14 00:02:40,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:40,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:02:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 00:02:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:40,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:40,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:40,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:40,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:40,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:02:40,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:40,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:40,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:40,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963548579] [2020-10-14 00:02:40,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:40,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 00:02:40,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450686077] [2020-10-14 00:02:40,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:02:40,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:40,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:02:40,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:02:40,752 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-10-14 00:02:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:40,941 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-14 00:02:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:02:40,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 00:02:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:40,944 INFO L225 Difference]: With dead ends: 67 [2020-10-14 00:02:40,944 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 00:02:40,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:02:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 00:02:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-14 00:02:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 00:02:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-14 00:02:40,953 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 20 [2020-10-14 00:02:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:40,953 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-14 00:02:40,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:02:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-14 00:02:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 00:02:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:40,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:40,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:02:40,956 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:40,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1732225596, now seen corresponding path program 2 times [2020-10-14 00:02:40,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:40,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931912030] [2020-10-14 00:02:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:42,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:43,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:43,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 00:02:43,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 00:02:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2993 [2020-10-14 00:02:43,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:43,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:02:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 00:02:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:44,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:44,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:44,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:44,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:44,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:02:44,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:44,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:44,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:44,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:44,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:44,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:44,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931912030] [2020-10-14 00:02:44,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:44,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:02:44,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372218341] [2020-10-14 00:02:44,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:02:44,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:02:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:02:44,048 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2020-10-14 00:02:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:44,222 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2020-10-14 00:02:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:02:44,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-14 00:02:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:44,224 INFO L225 Difference]: With dead ends: 80 [2020-10-14 00:02:44,224 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 00:02:44,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:02:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 00:02:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-14 00:02:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 00:02:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-14 00:02:44,232 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 25 [2020-10-14 00:02:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:44,233 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-14 00:02:44,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:02:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-14 00:02:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 00:02:44,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:44,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:44,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:02:44,235 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash -714249500, now seen corresponding path program 3 times [2020-10-14 00:02:44,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:44,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256118273] [2020-10-14 00:02:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:44,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:46,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:02:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 00:02:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:49,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:49,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:49,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:49,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:49,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:49,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:49,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256118273] [2020-10-14 00:02:49,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:49,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:02:49,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890685672] [2020-10-14 00:02:49,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:02:49,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:49,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:02:49,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:02:49,365 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-10-14 00:02:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:49,541 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2020-10-14 00:02:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 00:02:49,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-14 00:02:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:49,544 INFO L225 Difference]: With dead ends: 93 [2020-10-14 00:02:49,544 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 00:02:49,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:02:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 00:02:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2020-10-14 00:02:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 00:02:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-14 00:02:49,552 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 30 [2020-10-14 00:02:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:49,553 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-14 00:02:49,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:02:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-14 00:02:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 00:02:49,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:49,554 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:49,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:02:49,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash -58338500, now seen corresponding path program 4 times [2020-10-14 00:02:49,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:49,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618638377] [2020-10-14 00:02:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:49,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:51,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:54,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:54,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:54,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:54,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 00:02:54,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-14 00:02:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 00:02:54,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:54,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:02:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 00:02:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:54,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:54,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:54,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:54,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:02:54,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:54,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:54,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:54,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:54,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:54,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:02:54,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618638377] [2020-10-14 00:02:54,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:54,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:02:54,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734887623] [2020-10-14 00:02:54,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:02:54,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:02:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:02:54,682 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 8 states. [2020-10-14 00:02:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:54,950 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2020-10-14 00:02:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:02:54,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-14 00:02:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:54,952 INFO L225 Difference]: With dead ends: 106 [2020-10-14 00:02:54,952 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 00:02:54,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:02:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 00:02:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2020-10-14 00:02:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 00:02:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-14 00:02:54,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 35 [2020-10-14 00:02:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:54,962 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-14 00:02:54,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:02:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-14 00:02:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 00:02:54,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:54,964 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:54,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:02:54,964 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1835474460, now seen corresponding path program 5 times [2020-10-14 00:02:54,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:54,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212570489] [2020-10-14 00:02:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:57,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:57,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:00,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 00:03:00,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-14 00:03:00,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 00:03:00,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:00,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:03:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:00,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 00:03:00,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 00:03:00,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:00,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:00,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:00,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:00,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:00,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:00,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212570489] [2020-10-14 00:03:00,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:00,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:03:00,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404643559] [2020-10-14 00:03:00,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:03:00,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:03:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:03:00,131 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 9 states. [2020-10-14 00:03:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:00,396 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2020-10-14 00:03:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:03:00,396 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-14 00:03:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:00,398 INFO L225 Difference]: With dead ends: 119 [2020-10-14 00:03:00,398 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 00:03:00,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:03:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 00:03:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2020-10-14 00:03:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 00:03:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2020-10-14 00:03:00,414 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 40 [2020-10-14 00:03:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:00,415 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2020-10-14 00:03:00,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:03:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2020-10-14 00:03:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 00:03:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:00,418 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:00,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:03:00,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:00,420 INFO L82 PathProgramCache]: Analyzing trace with hash -756237252, now seen corresponding path program 6 times [2020-10-14 00:03:00,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:00,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363822304] [2020-10-14 00:03:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:00,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:03,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:05,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 00:03:05,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-14 00:03:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-14 00:03:05,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:05,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:03:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:03:05,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:05,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:05,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:05,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:05,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:05,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:05,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363822304] [2020-10-14 00:03:05,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:05,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:03:05,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488569496] [2020-10-14 00:03:05,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:03:05,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:03:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:03:05,639 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 10 states. [2020-10-14 00:03:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:05,908 INFO L93 Difference]: Finished difference Result 132 states and 184 transitions. [2020-10-14 00:03:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:03:05,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-14 00:03:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:05,910 INFO L225 Difference]: With dead ends: 132 [2020-10-14 00:03:05,911 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 00:03:05,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:03:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 00:03:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2020-10-14 00:03:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 00:03:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-10-14 00:03:05,920 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 45 [2020-10-14 00:03:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:05,921 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-10-14 00:03:05,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:03:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-10-14 00:03:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 00:03:05,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:05,922 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:05,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:03:05,923 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1696307428, now seen corresponding path program 7 times [2020-10-14 00:03:05,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:05,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815822336] [2020-10-14 00:03:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:05,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:11,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 00:03:11,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-14 00:03:11,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-14 00:03:11,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:11,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:03:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 00:03:11,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:11,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:11,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:11,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:11,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:03:11,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:11,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:11,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:11,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:11,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815822336] [2020-10-14 00:03:11,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:11,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:03:11,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508926431] [2020-10-14 00:03:11,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:03:11,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:03:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:03:11,161 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-10-14 00:03:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:11,436 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2020-10-14 00:03:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 00:03:11,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-14 00:03:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:11,438 INFO L225 Difference]: With dead ends: 145 [2020-10-14 00:03:11,438 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 00:03:11,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:03:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 00:03:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2020-10-14 00:03:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 00:03:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2020-10-14 00:03:11,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 50 [2020-10-14 00:03:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:11,454 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2020-10-14 00:03:11,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:03:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2020-10-14 00:03:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 00:03:11,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:11,457 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:11,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:03:11,458 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589252, now seen corresponding path program 8 times [2020-10-14 00:03:11,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:11,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326250310] [2020-10-14 00:03:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:11,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:16,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 00:03:16,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 43 [2020-10-14 00:03:16,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:03:16,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:16,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:16,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:03:16,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:16,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 00:03:16,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:16,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:16,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:16,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:03:16,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:16,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:16,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326250310] [2020-10-14 00:03:16,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:16,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:03:16,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658230547] [2020-10-14 00:03:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:03:16,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:03:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:03:16,627 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 12 states. [2020-10-14 00:03:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:16,870 INFO L93 Difference]: Finished difference Result 158 states and 222 transitions. [2020-10-14 00:03:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:03:16,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-14 00:03:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:16,873 INFO L225 Difference]: With dead ends: 158 [2020-10-14 00:03:16,873 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 00:03:16,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:03:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 00:03:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 83. [2020-10-14 00:03:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 00:03:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2020-10-14 00:03:16,890 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 55 [2020-10-14 00:03:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:16,890 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2020-10-14 00:03:16,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:03:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2020-10-14 00:03:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 00:03:16,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:16,894 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:16,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:03:16,895 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash -119173148, now seen corresponding path program 9 times [2020-10-14 00:03:16,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:16,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023436793] [2020-10-14 00:03:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:16,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 45 [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:03:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 00:03:21,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:22,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023436793] [2020-10-14 00:03:22,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:22,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:03:22,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551948220] [2020-10-14 00:03:22,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:03:22,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:03:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:03:22,075 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand 13 states. [2020-10-14 00:03:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:22,382 INFO L93 Difference]: Finished difference Result 171 states and 241 transitions. [2020-10-14 00:03:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 00:03:22,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-14 00:03:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:22,385 INFO L225 Difference]: With dead ends: 171 [2020-10-14 00:03:22,385 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 00:03:22,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:03:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 00:03:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-14 00:03:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 00:03:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2020-10-14 00:03:22,393 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 60 [2020-10-14 00:03:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:22,394 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2020-10-14 00:03:22,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:03:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2020-10-14 00:03:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 00:03:22,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:22,395 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:22,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 00:03:22,396 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1734135356, now seen corresponding path program 10 times [2020-10-14 00:03:22,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:22,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119961416] [2020-10-14 00:03:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:22,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:25,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:25,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:25,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:25,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:27,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:27,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:03:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 00:03:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:27,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:27,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:27,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:27,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:27,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:27,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:27,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:27,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:27,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119961416] [2020-10-14 00:03:27,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:27,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:03:27,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811807775] [2020-10-14 00:03:27,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:03:27,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:03:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:03:27,707 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand 14 states. [2020-10-14 00:03:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:28,065 INFO L93 Difference]: Finished difference Result 184 states and 260 transitions. [2020-10-14 00:03:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:03:28,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-14 00:03:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:28,067 INFO L225 Difference]: With dead ends: 184 [2020-10-14 00:03:28,067 INFO L226 Difference]: Without dead ends: 171 [2020-10-14 00:03:28,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:03:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-14 00:03:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 97. [2020-10-14 00:03:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 00:03:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-10-14 00:03:28,080 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 65 [2020-10-14 00:03:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:28,080 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-10-14 00:03:28,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:03:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-10-14 00:03:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 00:03:28,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:28,081 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:28,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 00:03:28,082 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -840513820, now seen corresponding path program 11 times [2020-10-14 00:03:28,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:28,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729921905] [2020-10-14 00:03:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:28,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:29,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:03:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 00:03:33,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:33,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:33,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:03:33,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:33,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:33,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729921905] [2020-10-14 00:03:33,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:33,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:03:33,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37930481] [2020-10-14 00:03:33,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:03:33,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:03:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:03:33,325 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 15 states. [2020-10-14 00:03:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:33,783 INFO L93 Difference]: Finished difference Result 197 states and 279 transitions. [2020-10-14 00:03:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 00:03:33,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-14 00:03:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:33,787 INFO L225 Difference]: With dead ends: 197 [2020-10-14 00:03:33,787 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 00:03:33,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:03:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 00:03:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2020-10-14 00:03:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 00:03:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2020-10-14 00:03:33,811 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 70 [2020-10-14 00:03:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:33,812 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2020-10-14 00:03:33,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:03:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2020-10-14 00:03:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 00:03:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:33,813 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:33,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:03:33,813 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1703278396, now seen corresponding path program 12 times [2020-10-14 00:03:33,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:33,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006716424] [2020-10-14 00:03:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:33,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:34,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 00:03:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:39,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:39,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:39,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:39,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006716424] [2020-10-14 00:03:39,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:39,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:03:39,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359081490] [2020-10-14 00:03:39,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:03:39,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:39,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:03:39,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:03:39,082 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand 16 states. [2020-10-14 00:03:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:39,532 INFO L93 Difference]: Finished difference Result 210 states and 298 transitions. [2020-10-14 00:03:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:03:39,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-14 00:03:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:39,534 INFO L225 Difference]: With dead ends: 210 [2020-10-14 00:03:39,534 INFO L226 Difference]: Without dead ends: 197 [2020-10-14 00:03:39,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:03:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-14 00:03:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2020-10-14 00:03:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 00:03:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2020-10-14 00:03:39,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 75 [2020-10-14 00:03:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:39,545 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2020-10-14 00:03:39,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:03:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2020-10-14 00:03:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 00:03:39,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:39,550 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:39,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:03:39,550 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash 940522980, now seen corresponding path program 13 times [2020-10-14 00:03:39,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:39,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134419700] [2020-10-14 00:03:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:39,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:39,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:39,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:42,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:43,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:44,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:44,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:44,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 00:03:44,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:44,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:44,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:44,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:44,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134419700] [2020-10-14 00:03:44,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:44,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:03:44,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946356198] [2020-10-14 00:03:44,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:03:44,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:03:44,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:03:44,784 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand 17 states. [2020-10-14 00:03:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:45,197 INFO L93 Difference]: Finished difference Result 223 states and 317 transitions. [2020-10-14 00:03:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 00:03:45,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-14 00:03:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:45,200 INFO L225 Difference]: With dead ends: 223 [2020-10-14 00:03:45,200 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 00:03:45,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:03:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 00:03:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2020-10-14 00:03:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 00:03:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-10-14 00:03:45,210 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 80 [2020-10-14 00:03:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:45,211 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-10-14 00:03:45,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:03:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-10-14 00:03:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 00:03:45,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:45,212 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:45,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:03:45,213 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 621797436, now seen corresponding path program 14 times [2020-10-14 00:03:45,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:45,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547917841] [2020-10-14 00:03:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:45,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5325 [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:03:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 00:03:50,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:50,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:50,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:50,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:50,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:50,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:50,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:50,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547917841] [2020-10-14 00:03:50,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:50,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:03:50,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379189468] [2020-10-14 00:03:50,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:03:50,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:03:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:03:50,790 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 18 states. [2020-10-14 00:03:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:51,216 INFO L93 Difference]: Finished difference Result 236 states and 336 transitions. [2020-10-14 00:03:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 00:03:51,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-14 00:03:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:51,219 INFO L225 Difference]: With dead ends: 236 [2020-10-14 00:03:51,219 INFO L226 Difference]: Without dead ends: 223 [2020-10-14 00:03:51,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:03:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-14 00:03:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 125. [2020-10-14 00:03:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 00:03:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2020-10-14 00:03:51,228 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 85 [2020-10-14 00:03:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:51,229 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2020-10-14 00:03:51,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:03:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2020-10-14 00:03:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 00:03:51,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:51,230 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:51,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:03:51,231 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1599010020, now seen corresponding path program 15 times [2020-10-14 00:03:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:51,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095903825] [2020-10-14 00:03:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:51,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:56,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:56,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:56,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 00:03:56,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 00:03:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 00:03:56,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:56,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:56,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:56,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:56,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:56,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:56,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:56,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:56,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:56,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:56,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:56,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:56,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:03:56,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095903825] [2020-10-14 00:03:56,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:56,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 00:03:56,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92043804] [2020-10-14 00:03:56,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 00:03:56,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 00:03:56,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:03:56,654 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand 19 states. [2020-10-14 00:03:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:57,131 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2020-10-14 00:03:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 00:03:57,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-14 00:03:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:57,133 INFO L225 Difference]: With dead ends: 249 [2020-10-14 00:03:57,134 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 00:03:57,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:03:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 00:03:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-10-14 00:03:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 00:03:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2020-10-14 00:03:57,142 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 90 [2020-10-14 00:03:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:57,142 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2020-10-14 00:03:57,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 00:03:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2020-10-14 00:03:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 00:03:57,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:57,144 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:57,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:03:57,144 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -200636100, now seen corresponding path program 16 times [2020-10-14 00:03:57,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:57,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010997527] [2020-10-14 00:03:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:57,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:57,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:58,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:00,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:01,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:02,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5758 [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:02,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:04:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 00:04:02,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:03,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:03,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:03,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010997527] [2020-10-14 00:04:03,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:03,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 00:04:03,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981773088] [2020-10-14 00:04:03,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 00:04:03,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 00:04:03,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:04:03,192 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand 20 states. [2020-10-14 00:04:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:03,710 INFO L93 Difference]: Finished difference Result 262 states and 374 transitions. [2020-10-14 00:04:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 00:04:03,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-14 00:04:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:03,716 INFO L225 Difference]: With dead ends: 262 [2020-10-14 00:04:03,716 INFO L226 Difference]: Without dead ends: 249 [2020-10-14 00:04:03,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:04:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-14 00:04:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 139. [2020-10-14 00:04:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 00:04:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2020-10-14 00:04:03,725 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 95 [2020-10-14 00:04:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:03,725 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2020-10-14 00:04:03,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 00:04:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2020-10-14 00:04:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 00:04:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:03,727 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:03,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:04:03,727 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1066789860, now seen corresponding path program 17 times [2020-10-14 00:04:03,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:03,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233240724] [2020-10-14 00:04:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:05,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:05,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:06,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:06,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:07,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:07,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:08,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:08,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 00:04:08,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 00:04:08,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 00:04:08,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:08,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:08,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 00:04:08,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:08,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 00:04:08,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:09,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:09,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233240724] [2020-10-14 00:04:09,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:09,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 00:04:09,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430518348] [2020-10-14 00:04:09,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 00:04:09,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 00:04:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:04:09,066 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 21 states. [2020-10-14 00:04:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:09,538 INFO L93 Difference]: Finished difference Result 275 states and 393 transitions. [2020-10-14 00:04:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 00:04:09,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-14 00:04:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:09,541 INFO L225 Difference]: With dead ends: 275 [2020-10-14 00:04:09,542 INFO L226 Difference]: Without dead ends: 262 [2020-10-14 00:04:09,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:04:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-14 00:04:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 146. [2020-10-14 00:04:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 00:04:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2020-10-14 00:04:09,551 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 100 [2020-10-14 00:04:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:09,551 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2020-10-14 00:04:09,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 00:04:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2020-10-14 00:04:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 00:04:09,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:09,553 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:09,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:04:09,553 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -863636932, now seen corresponding path program 18 times [2020-10-14 00:04:09,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:09,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160963426] [2020-10-14 00:04:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:11,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:12,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 00:04:14,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:14,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:14,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:14,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:14,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:14,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:14,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160963426] [2020-10-14 00:04:14,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:14,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 00:04:14,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777476980] [2020-10-14 00:04:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 00:04:14,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 00:04:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:04:14,882 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 22 states. [2020-10-14 00:04:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:15,464 INFO L93 Difference]: Finished difference Result 288 states and 412 transitions. [2020-10-14 00:04:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 00:04:15,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-14 00:04:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:15,467 INFO L225 Difference]: With dead ends: 288 [2020-10-14 00:04:15,467 INFO L226 Difference]: Without dead ends: 275 [2020-10-14 00:04:15,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:04:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-14 00:04:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 153. [2020-10-14 00:04:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 00:04:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 213 transitions. [2020-10-14 00:04:15,476 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 213 transitions. Word has length 105 [2020-10-14 00:04:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:15,477 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 213 transitions. [2020-10-14 00:04:15,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 00:04:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 213 transitions. [2020-10-14 00:04:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 00:04:15,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:15,478 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:15,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:04:15,479 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1462492444, now seen corresponding path program 19 times [2020-10-14 00:04:15,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:15,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793664468] [2020-10-14 00:04:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:15,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:17,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:18,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:20,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:20,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 00:04:20,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 00:04:20,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:04:20,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:20,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 00:04:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 00:04:20,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:20,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:20,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:20,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:20,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793664468] [2020-10-14 00:04:20,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:20,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 00:04:20,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139800465] [2020-10-14 00:04:20,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 00:04:20,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 00:04:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:04:20,847 INFO L87 Difference]: Start difference. First operand 153 states and 213 transitions. Second operand 23 states. [2020-10-14 00:04:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:21,374 INFO L93 Difference]: Finished difference Result 301 states and 431 transitions. [2020-10-14 00:04:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 00:04:21,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-10-14 00:04:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:21,376 INFO L225 Difference]: With dead ends: 301 [2020-10-14 00:04:21,376 INFO L226 Difference]: Without dead ends: 288 [2020-10-14 00:04:21,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:04:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-14 00:04:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 160. [2020-10-14 00:04:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 00:04:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2020-10-14 00:04:21,385 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 110 [2020-10-14 00:04:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:21,385 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2020-10-14 00:04:21,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 00:04:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2020-10-14 00:04:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 00:04:21,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:21,387 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:21,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:04:21,388 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1418861372, now seen corresponding path program 20 times [2020-10-14 00:04:21,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:21,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790212849] [2020-10-14 00:04:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:24,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:27,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 00:04:27,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6195 [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 00:04:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:29,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:29,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:29,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:29,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:29,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:29,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:29,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 34 proven. 167 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2020-10-14 00:04:29,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790212849] [2020-10-14 00:04:29,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:29,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:04:29,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46131418] [2020-10-14 00:04:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:04:29,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:04:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:04:29,673 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand 11 states. [2020-10-14 00:04:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:30,379 INFO L93 Difference]: Finished difference Result 500 states and 696 transitions. [2020-10-14 00:04:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 00:04:30,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 115 [2020-10-14 00:04:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:30,383 INFO L225 Difference]: With dead ends: 500 [2020-10-14 00:04:30,383 INFO L226 Difference]: Without dead ends: 350 [2020-10-14 00:04:30,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 36 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:04:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-14 00:04:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 262. [2020-10-14 00:04:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-14 00:04:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2020-10-14 00:04:30,397 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 115 [2020-10-14 00:04:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:30,398 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2020-10-14 00:04:30,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:04:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2020-10-14 00:04:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 00:04:30,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:30,400 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:30,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:04:30,400 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1538726932, now seen corresponding path program 1 times [2020-10-14 00:04:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:30,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685814432] [2020-10-14 00:04:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:33,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5315 [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:35,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 00:04:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 00:04:35,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:36,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:36,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:36,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685814432] [2020-10-14 00:04:36,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:36,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 00:04:36,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214892213] [2020-10-14 00:04:36,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 00:04:36,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 00:04:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:04:36,109 INFO L87 Difference]: Start difference. First operand 262 states and 344 transitions. Second operand 24 states. [2020-10-14 00:04:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:36,738 INFO L93 Difference]: Finished difference Result 448 states and 605 transitions. [2020-10-14 00:04:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 00:04:36,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2020-10-14 00:04:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:36,741 INFO L225 Difference]: With dead ends: 448 [2020-10-14 00:04:36,741 INFO L226 Difference]: Without dead ends: 431 [2020-10-14 00:04:36,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:04:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-14 00:04:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 274. [2020-10-14 00:04:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 00:04:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 360 transitions. [2020-10-14 00:04:36,756 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 360 transitions. Word has length 116 [2020-10-14 00:04:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:36,757 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 360 transitions. [2020-10-14 00:04:36,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 00:04:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 360 transitions. [2020-10-14 00:04:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 00:04:36,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:36,759 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:36,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:04:36,759 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:36,760 INFO L82 PathProgramCache]: Analyzing trace with hash -963330252, now seen corresponding path program 2 times [2020-10-14 00:04:36,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:36,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135574551] [2020-10-14 00:04:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:39,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:41,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:42,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:42,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:04:42,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5433 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 00:04:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:42,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:42,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:42,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:42,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:42,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:42,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135574551] [2020-10-14 00:04:42,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:42,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:04:42,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063137455] [2020-10-14 00:04:42,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:04:42,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:04:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:04:42,642 INFO L87 Difference]: Start difference. First operand 274 states and 360 transitions. Second operand 25 states. [2020-10-14 00:04:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:43,214 INFO L93 Difference]: Finished difference Result 467 states and 631 transitions. [2020-10-14 00:04:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 00:04:43,215 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-14 00:04:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:43,217 INFO L225 Difference]: With dead ends: 467 [2020-10-14 00:04:43,217 INFO L226 Difference]: Without dead ends: 450 [2020-10-14 00:04:43,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:04:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-14 00:04:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 286. [2020-10-14 00:04:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-14 00:04:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 376 transitions. [2020-10-14 00:04:43,231 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 376 transitions. Word has length 121 [2020-10-14 00:04:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:43,232 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 376 transitions. [2020-10-14 00:04:43,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:04:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 376 transitions. [2020-10-14 00:04:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 00:04:43,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:43,234 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:43,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:04:43,234 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1957252884, now seen corresponding path program 3 times [2020-10-14 00:04:43,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:43,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852825250] [2020-10-14 00:04:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:46,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:49,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:49,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 00:04:49,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5805 [2020-10-14 00:04:49,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:49,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 00:04:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:49,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-14 00:04:49,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:49,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:49,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:49,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:49,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:49,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:49,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:49,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:49,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:49,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:49,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:49,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:49,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852825250] [2020-10-14 00:04:49,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:49,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 00:04:49,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169499605] [2020-10-14 00:04:49,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 00:04:49,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:49,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 00:04:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:04:49,490 INFO L87 Difference]: Start difference. First operand 286 states and 376 transitions. Second operand 26 states. [2020-10-14 00:04:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:50,079 INFO L93 Difference]: Finished difference Result 486 states and 657 transitions. [2020-10-14 00:04:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 00:04:50,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 126 [2020-10-14 00:04:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:50,084 INFO L225 Difference]: With dead ends: 486 [2020-10-14 00:04:50,084 INFO L226 Difference]: Without dead ends: 469 [2020-10-14 00:04:50,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:04:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-14 00:04:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 298. [2020-10-14 00:04:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-14 00:04:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 392 transitions. [2020-10-14 00:04:50,100 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 392 transitions. Word has length 126 [2020-10-14 00:04:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:50,100 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 392 transitions. [2020-10-14 00:04:50,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 00:04:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 392 transitions. [2020-10-14 00:04:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 00:04:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:50,102 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:50,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:04:50,102 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash 287248948, now seen corresponding path program 4 times [2020-10-14 00:04:50,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:50,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066709766] [2020-10-14 00:04:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:50,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:55,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 00:04:55,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:55,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:55,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:55,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:55,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:55,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:55,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:55,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:55,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:55,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:04:55,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066709766] [2020-10-14 00:04:55,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:55,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 00:04:55,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409629685] [2020-10-14 00:04:55,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 00:04:55,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 00:04:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:04:55,602 INFO L87 Difference]: Start difference. First operand 298 states and 392 transitions. Second operand 27 states. [2020-10-14 00:04:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:56,385 INFO L93 Difference]: Finished difference Result 505 states and 683 transitions. [2020-10-14 00:04:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 00:04:56,386 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2020-10-14 00:04:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:56,388 INFO L225 Difference]: With dead ends: 505 [2020-10-14 00:04:56,388 INFO L226 Difference]: Without dead ends: 488 [2020-10-14 00:04:56,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:04:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-14 00:04:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 310. [2020-10-14 00:04:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-14 00:04:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 408 transitions. [2020-10-14 00:04:56,405 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 408 transitions. Word has length 131 [2020-10-14 00:04:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:56,405 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 408 transitions. [2020-10-14 00:04:56,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 00:04:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 408 transitions. [2020-10-14 00:04:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 00:04:56,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:56,407 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:56,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 00:04:56,407 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -381141524, now seen corresponding path program 5 times [2020-10-14 00:04:56,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:56,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314220547] [2020-10-14 00:04:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:56,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:57,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:00,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:01,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-14 00:05:01,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:01,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:01,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:01,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:01,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:01,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:01,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:01,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:01,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:01,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:01,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:01,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:05:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314220547] [2020-10-14 00:05:02,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:02,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 00:05:02,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206103014] [2020-10-14 00:05:02,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 00:05:02,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 00:05:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:05:02,006 INFO L87 Difference]: Start difference. First operand 310 states and 408 transitions. Second operand 28 states. [2020-10-14 00:05:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:02,925 INFO L93 Difference]: Finished difference Result 524 states and 709 transitions. [2020-10-14 00:05:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 00:05:02,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-10-14 00:05:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:02,929 INFO L225 Difference]: With dead ends: 524 [2020-10-14 00:05:02,929 INFO L226 Difference]: Without dead ends: 507 [2020-10-14 00:05:02,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:05:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-14 00:05:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 322. [2020-10-14 00:05:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-14 00:05:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 424 transitions. [2020-10-14 00:05:02,944 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 424 transitions. Word has length 136 [2020-10-14 00:05:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:02,945 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 424 transitions. [2020-10-14 00:05:02,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 00:05:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 424 transitions. [2020-10-14 00:05:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 00:05:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:02,946 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:02,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 00:05:02,947 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1562223924, now seen corresponding path program 6 times [2020-10-14 00:05:02,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:02,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75552977] [2020-10-14 00:05:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:03,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:08,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5761 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:08,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 00:05:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:09,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:09,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:09,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:09,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:09,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:09,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75552977] [2020-10-14 00:05:09,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:09,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 00:05:09,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695952999] [2020-10-14 00:05:09,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 00:05:09,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 00:05:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:05:09,258 INFO L87 Difference]: Start difference. First operand 322 states and 424 transitions. Second operand 29 states. [2020-10-14 00:05:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:10,140 INFO L93 Difference]: Finished difference Result 543 states and 735 transitions. [2020-10-14 00:05:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 00:05:10,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-14 00:05:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:10,146 INFO L225 Difference]: With dead ends: 543 [2020-10-14 00:05:10,146 INFO L226 Difference]: Without dead ends: 526 [2020-10-14 00:05:10,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:05:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-14 00:05:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 334. [2020-10-14 00:05:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-14 00:05:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 440 transitions. [2020-10-14 00:05:10,171 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 440 transitions. Word has length 141 [2020-10-14 00:05:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:10,172 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 440 transitions. [2020-10-14 00:05:10,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 00:05:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 440 transitions. [2020-10-14 00:05:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 00:05:10,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:10,174 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:10,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 00:05:10,175 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1148029676, now seen corresponding path program 7 times [2020-10-14 00:05:10,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:10,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479548261] [2020-10-14 00:05:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:15,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-14 00:05:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:15,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:15,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:15,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:15,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:15,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:15,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:15,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:15,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:15,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:05:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:15,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479548261] [2020-10-14 00:05:15,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:15,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 00:05:15,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712090049] [2020-10-14 00:05:15,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 00:05:15,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:15,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 00:05:15,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:05:15,962 INFO L87 Difference]: Start difference. First operand 334 states and 440 transitions. Second operand 30 states. [2020-10-14 00:05:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:17,051 INFO L93 Difference]: Finished difference Result 562 states and 761 transitions. [2020-10-14 00:05:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 00:05:17,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2020-10-14 00:05:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:17,057 INFO L225 Difference]: With dead ends: 562 [2020-10-14 00:05:17,057 INFO L226 Difference]: Without dead ends: 545 [2020-10-14 00:05:17,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:05:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-14 00:05:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 346. [2020-10-14 00:05:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-14 00:05:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 456 transitions. [2020-10-14 00:05:17,086 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 456 transitions. Word has length 146 [2020-10-14 00:05:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:17,087 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 456 transitions. [2020-10-14 00:05:17,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 00:05:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 456 transitions. [2020-10-14 00:05:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 00:05:17,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:17,090 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:17,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 00:05:17,091 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1774159820, now seen corresponding path program 8 times [2020-10-14 00:05:17,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:17,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301941741] [2020-10-14 00:05:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:17,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:22,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 00:05:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 00:05:22,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:22,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 00:05:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 00:05:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:22,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:22,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:22,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:22,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:22,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:22,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:22,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:22,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:22,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:05:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:22,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301941741] [2020-10-14 00:05:22,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:22,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 00:05:22,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274328974] [2020-10-14 00:05:22,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 00:05:22,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 00:05:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:05:22,779 INFO L87 Difference]: Start difference. First operand 346 states and 456 transitions. Second operand 31 states. [2020-10-14 00:05:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:23,884 INFO L93 Difference]: Finished difference Result 581 states and 787 transitions. [2020-10-14 00:05:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 00:05:23,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 151 [2020-10-14 00:05:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:23,889 INFO L225 Difference]: With dead ends: 581 [2020-10-14 00:05:23,889 INFO L226 Difference]: Without dead ends: 564 [2020-10-14 00:05:23,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-14 00:05:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-14 00:05:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 358. [2020-10-14 00:05:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-14 00:05:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 472 transitions. [2020-10-14 00:05:23,906 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 472 transitions. Word has length 151 [2020-10-14 00:05:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:23,907 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 472 transitions. [2020-10-14 00:05:23,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 00:05:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 472 transitions. [2020-10-14 00:05:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 00:05:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:23,909 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:23,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 00:05:23,909 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2132187116, now seen corresponding path program 9 times [2020-10-14 00:05:23,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:23,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147882815] [2020-10-14 00:05:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:29,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:29,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 00:05:29,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5696 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-14 00:05:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:30,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:30,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:30,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:30,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:30,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147882815] [2020-10-14 00:05:30,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:30,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 00:05:30,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496330472] [2020-10-14 00:05:30,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 00:05:30,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 00:05:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 00:05:30,269 INFO L87 Difference]: Start difference. First operand 358 states and 472 transitions. Second operand 32 states. [2020-10-14 00:05:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:31,074 INFO L93 Difference]: Finished difference Result 600 states and 813 transitions. [2020-10-14 00:05:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 00:05:31,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2020-10-14 00:05:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:31,078 INFO L225 Difference]: With dead ends: 600 [2020-10-14 00:05:31,078 INFO L226 Difference]: Without dead ends: 583 [2020-10-14 00:05:31,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:05:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-10-14 00:05:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 370. [2020-10-14 00:05:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-14 00:05:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 488 transitions. [2020-10-14 00:05:31,097 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 488 transitions. Word has length 156 [2020-10-14 00:05:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:31,097 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 488 transitions. [2020-10-14 00:05:31,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 00:05:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 488 transitions. [2020-10-14 00:05:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 00:05:31,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:31,099 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:31,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 00:05:31,100 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -868775116, now seen corresponding path program 10 times [2020-10-14 00:05:31,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:31,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814655955] [2020-10-14 00:05:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:39,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:39,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 00:05:39,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8214 [2020-10-14 00:05:39,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:39,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 00:05:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 00:05:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:39,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:39,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:39,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:39,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:39,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:39,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:40,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814655955] [2020-10-14 00:05:40,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:40,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 00:05:40,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974629485] [2020-10-14 00:05:40,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 00:05:40,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 00:05:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:05:40,020 INFO L87 Difference]: Start difference. First operand 370 states and 488 transitions. Second operand 33 states. [2020-10-14 00:05:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:41,107 INFO L93 Difference]: Finished difference Result 619 states and 839 transitions. [2020-10-14 00:05:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 00:05:41,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 161 [2020-10-14 00:05:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:41,113 INFO L225 Difference]: With dead ends: 619 [2020-10-14 00:05:41,113 INFO L226 Difference]: Without dead ends: 602 [2020-10-14 00:05:41,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 00:05:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-14 00:05:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 382. [2020-10-14 00:05:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-14 00:05:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 504 transitions. [2020-10-14 00:05:41,136 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 504 transitions. Word has length 161 [2020-10-14 00:05:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:41,137 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 504 transitions. [2020-10-14 00:05:41,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 00:05:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 504 transitions. [2020-10-14 00:05:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 00:05:41,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:41,138 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:41,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 00:05:41,139 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -678206228, now seen corresponding path program 11 times [2020-10-14 00:05:41,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:41,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125529526] [2020-10-14 00:05:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:42,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:46,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-14 00:05:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:46,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:46,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:46,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:46,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:46,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:46,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125529526] [2020-10-14 00:05:46,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:46,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 00:05:46,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171105353] [2020-10-14 00:05:46,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 00:05:46,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:46,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 00:05:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 00:05:46,910 INFO L87 Difference]: Start difference. First operand 382 states and 504 transitions. Second operand 34 states. [2020-10-14 00:05:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:47,851 INFO L93 Difference]: Finished difference Result 638 states and 865 transitions. [2020-10-14 00:05:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 00:05:47,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 166 [2020-10-14 00:05:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:47,856 INFO L225 Difference]: With dead ends: 638 [2020-10-14 00:05:47,856 INFO L226 Difference]: Without dead ends: 621 [2020-10-14 00:05:47,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:05:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-14 00:05:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 394. [2020-10-14 00:05:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-14 00:05:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 520 transitions. [2020-10-14 00:05:47,886 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 520 transitions. Word has length 166 [2020-10-14 00:05:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:47,887 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 520 transitions. [2020-10-14 00:05:47,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 00:05:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 520 transitions. [2020-10-14 00:05:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-14 00:05:47,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:47,890 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:47,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 00:05:47,890 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 850583092, now seen corresponding path program 12 times [2020-10-14 00:05:47,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:47,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460632590] [2020-10-14 00:05:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:49,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:51,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:55,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7198 [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 00:05:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-14 00:05:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:55,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:55,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:55,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:55,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:55,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:55,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:55,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:05:55,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460632590] [2020-10-14 00:05:55,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:55,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 00:05:55,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737606004] [2020-10-14 00:05:55,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 00:05:55,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 00:05:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:05:55,896 INFO L87 Difference]: Start difference. First operand 394 states and 520 transitions. Second operand 35 states. [2020-10-14 00:05:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:05:56,871 INFO L93 Difference]: Finished difference Result 657 states and 891 transitions. [2020-10-14 00:05:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 00:05:56,871 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 171 [2020-10-14 00:05:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:05:56,875 INFO L225 Difference]: With dead ends: 657 [2020-10-14 00:05:56,875 INFO L226 Difference]: Without dead ends: 640 [2020-10-14 00:05:56,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 00:05:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-14 00:05:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 406. [2020-10-14 00:05:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-14 00:05:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 536 transitions. [2020-10-14 00:05:56,896 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 536 transitions. Word has length 171 [2020-10-14 00:05:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:05:56,897 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 536 transitions. [2020-10-14 00:05:56,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 00:05:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 536 transitions. [2020-10-14 00:05:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-14 00:05:56,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:05:56,899 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:05:56,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 00:05:56,899 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:05:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:05:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash -399248916, now seen corresponding path program 13 times [2020-10-14 00:05:56,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:05:56,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135658522] [2020-10-14 00:05:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:05:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:01,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:01,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-14 00:06:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:02,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:02,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:02,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:02,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:02,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:02,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:06:02,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135658522] [2020-10-14 00:06:02,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:02,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 00:06:02,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713394889] [2020-10-14 00:06:02,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 00:06:02,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 00:06:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 00:06:02,781 INFO L87 Difference]: Start difference. First operand 406 states and 536 transitions. Second operand 36 states. [2020-10-14 00:06:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:04,074 INFO L93 Difference]: Finished difference Result 676 states and 917 transitions. [2020-10-14 00:06:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 00:06:04,075 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-10-14 00:06:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:04,079 INFO L225 Difference]: With dead ends: 676 [2020-10-14 00:06:04,080 INFO L226 Difference]: Without dead ends: 659 [2020-10-14 00:06:04,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 00:06:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-14 00:06:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 418. [2020-10-14 00:06:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-14 00:06:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 552 transitions. [2020-10-14 00:06:04,111 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 552 transitions. Word has length 176 [2020-10-14 00:06:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:04,112 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 552 transitions. [2020-10-14 00:06:04,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 00:06:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 552 transitions. [2020-10-14 00:06:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 00:06:04,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:04,114 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:04,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 00:06:04,114 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash 560099636, now seen corresponding path program 14 times [2020-10-14 00:06:04,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:04,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531428969] [2020-10-14 00:06:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:04,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:06,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:09,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:06:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-14 00:06:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:09,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:06:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:09,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:09,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:06:09,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:06:09,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:06:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:06:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:06:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:06:09,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531428969] [2020-10-14 00:06:09,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:06:09,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 00:06:09,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849978862] [2020-10-14 00:06:09,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 00:06:09,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:06:09,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 00:06:09,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 00:06:09,987 INFO L87 Difference]: Start difference. First operand 418 states and 552 transitions. Second operand 37 states. [2020-10-14 00:06:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:06:11,065 INFO L93 Difference]: Finished difference Result 695 states and 943 transitions. [2020-10-14 00:06:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 00:06:11,066 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 181 [2020-10-14 00:06:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:06:11,069 INFO L225 Difference]: With dead ends: 695 [2020-10-14 00:06:11,069 INFO L226 Difference]: Without dead ends: 678 [2020-10-14 00:06:11,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 00:06:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-14 00:06:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 430. [2020-10-14 00:06:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-14 00:06:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 568 transitions. [2020-10-14 00:06:11,090 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 568 transitions. Word has length 181 [2020-10-14 00:06:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:06:11,090 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 568 transitions. [2020-10-14 00:06:11,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 00:06:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 568 transitions. [2020-10-14 00:06:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-14 00:06:11,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:06:11,092 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:06:11,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 00:06:11,093 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:06:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:06:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1488437524, now seen corresponding path program 15 times [2020-10-14 00:06:11,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:06:11,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144220911] [2020-10-14 00:06:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:06:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:06:11,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:06:13,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking...