/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:38:41,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:38:41,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:38:42,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:38:42,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:38:42,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:38:42,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:38:42,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:38:42,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:38:42,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:38:42,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:38:42,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:38:42,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:38:42,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:38:42,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:38:42,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:38:42,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:38:42,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:38:42,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:38:42,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:38:42,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:38:42,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:38:42,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:38:42,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:38:42,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:38:42,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:38:42,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:38:42,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:38:42,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:38:42,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:38:42,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:38:42,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:38:42,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:38:42,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:38:42,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:38:42,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:38:42,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:38:42,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:38:42,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:38:42,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:38:42,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:38:42,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:38:42,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:38:42,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:38:42,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:38:42,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:38:42,080 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:38:42,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:38:42,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:38:42,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:38:42,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:38:42,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:38:42,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:38:42,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:38:42,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:38:42,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:38:42,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:38:42,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:38:42,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:38:42,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:38:42,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:38:42,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:38:42,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:38:42,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:38:42,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:38:42,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:38:42,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:38:42,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:38:42,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:38:42,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:38:42,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:38:42,581 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:38:42,582 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-09-25 05:38:42,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c4b804cd/032fdbb4c21d4c1785430c04637fcd82/FLAGe8000dcd2 [2020-09-25 05:38:43,306 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:38:43,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-09-25 05:38:43,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c4b804cd/032fdbb4c21d4c1785430c04637fcd82/FLAGe8000dcd2 [2020-09-25 05:38:43,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c4b804cd/032fdbb4c21d4c1785430c04637fcd82 [2020-09-25 05:38:43,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:38:43,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:38:43,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:38:43,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:38:43,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:38:43,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:38:43" (1/1) ... [2020-09-25 05:38:43,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738c85d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:43, skipping insertion in model container [2020-09-25 05:38:43,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:38:43" (1/1) ... [2020-09-25 05:38:43,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:38:43,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:38:44,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:38:44,190 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:38:44,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:38:44,307 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:38:44,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44 WrapperNode [2020-09-25 05:38:44,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:38:44,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:38:44,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:38:44,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:38:44,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... [2020-09-25 05:38:44,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:38:44,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:38:44,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:38:44,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:38:44,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:38:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:38:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:38:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 05:38:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:38:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 05:38:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:38:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:38:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 05:38:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:38:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:38:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:38:45,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:38:45,888 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:38:45,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:38:45 BoogieIcfgContainer [2020-09-25 05:38:45,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:38:45,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:38:45,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:38:45,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:38:45,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:38:43" (1/3) ... [2020-09-25 05:38:45,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:38:45, skipping insertion in model container [2020-09-25 05:38:45,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:38:44" (2/3) ... [2020-09-25 05:38:45,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:38:45, skipping insertion in model container [2020-09-25 05:38:45,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:38:45" (3/3) ... [2020-09-25 05:38:45,908 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label32.c [2020-09-25 05:38:45,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:38:45,934 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:38:45,960 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:38:45,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:38:45,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:38:45,999 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:38:45,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:38:45,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:38:45,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:38:45,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:38:45,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:38:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-25 05:38:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 05:38:46,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:38:46,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:38:46,045 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:38:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:38:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1927363665, now seen corresponding path program 1 times [2020-09-25 05:38:46,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:38:46,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791069953] [2020-09-25 05:38:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:38:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:46,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:46,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 05:38:46,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:38:46,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-09-25 05:38:46,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:46,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:38:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 05:38:46,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:38:46,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:38:47,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:38:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:47,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:47,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:38:47,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:38:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 05:38:47,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:47,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:38:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:38:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:38:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:38:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:38:47,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791069953] [2020-09-25 05:38:47,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:38:47,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:38:47,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805792504] [2020-09-25 05:38:47,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:38:47,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:38:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:38:47,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:38:47,186 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-25 05:38:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:38:49,027 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-25 05:38:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:38:49,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-09-25 05:38:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:38:49,060 INFO L225 Difference]: With dead ends: 1069 [2020-09-25 05:38:49,060 INFO L226 Difference]: Without dead ends: 555 [2020-09-25 05:38:49,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:38:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-25 05:38:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-25 05:38:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-25 05:38:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-25 05:38:49,229 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 44 [2020-09-25 05:38:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:38:49,230 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-25 05:38:49,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:38:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-25 05:38:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 05:38:49,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:38:49,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:38:49,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:38:49,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:38:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:38:49,247 INFO L82 PathProgramCache]: Analyzing trace with hash -739682472, now seen corresponding path program 1 times [2020-09-25 05:38:49,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:38:49,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784626564] [2020-09-25 05:38:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:38:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:50,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-25 05:38:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:38:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-09-25 05:38:51,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:51,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:38:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-09-25 05:38:51,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 05:38:51,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:38:51,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:38:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:51,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:51,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:38:51,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:38:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:38:51,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:51,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:38:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:38:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:38:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:38:51,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:38:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:51,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:51,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:51,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 05:38:51,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:38:51,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-25 05:38:51,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:51,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:38:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:38:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 05:38:51,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:38:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:38:51,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784626564] [2020-09-25 05:38:51,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:38:51,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:38:51,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084438970] [2020-09-25 05:38:51,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:38:51,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:38:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:38:51,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:38:51,632 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 5 states. [2020-09-25 05:38:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:38:53,692 INFO L93 Difference]: Finished difference Result 1419 states and 1830 transitions. [2020-09-25 05:38:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:38:53,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-09-25 05:38:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:38:53,701 INFO L225 Difference]: With dead ends: 1419 [2020-09-25 05:38:53,701 INFO L226 Difference]: Without dead ends: 891 [2020-09-25 05:38:53,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:38:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-09-25 05:38:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 850. [2020-09-25 05:38:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-09-25 05:38:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1047 transitions. [2020-09-25 05:38:53,735 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1047 transitions. Word has length 124 [2020-09-25 05:38:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:38:53,736 INFO L479 AbstractCegarLoop]: Abstraction has 850 states and 1047 transitions. [2020-09-25 05:38:53,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:38:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1047 transitions. [2020-09-25 05:38:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-25 05:38:53,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:38:53,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:38:53,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:38:53,740 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:38:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:38:53,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1991578147, now seen corresponding path program 1 times [2020-09-25 05:38:53,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:38:53,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779634802] [2020-09-25 05:38:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:38:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:53,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:54,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:54,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-25 05:38:58,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:38:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4629 [2020-09-25 05:38:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:58,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:38:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-09-25 05:38:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:38:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:38:58,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:38:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:58,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:58,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:38:58,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:38:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:38:58,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:58,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:58,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:38:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:38:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:38:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:38:58,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:38:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:38:58,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:38:58,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:38:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 05:38:58,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:38:58,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-25 05:38:58,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:38:58,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:38:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:38:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:38:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 05:38:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:38:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:38:58,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779634802] [2020-09-25 05:38:58,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:38:58,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:38:58,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960986490] [2020-09-25 05:38:58,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:38:58,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:38:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:38:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:38:58,791 INFO L87 Difference]: Start difference. First operand 850 states and 1047 transitions. Second operand 6 states. [2020-09-25 05:39:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:39:01,656 INFO L93 Difference]: Finished difference Result 2692 states and 3487 transitions. [2020-09-25 05:39:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:39:01,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2020-09-25 05:39:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:39:01,674 INFO L225 Difference]: With dead ends: 2692 [2020-09-25 05:39:01,674 INFO L226 Difference]: Without dead ends: 1857 [2020-09-25 05:39:01,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:39:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-09-25 05:39:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1780. [2020-09-25 05:39:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2020-09-25 05:39:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2286 transitions. [2020-09-25 05:39:01,773 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2286 transitions. Word has length 133 [2020-09-25 05:39:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:39:01,779 INFO L479 AbstractCegarLoop]: Abstraction has 1780 states and 2286 transitions. [2020-09-25 05:39:01,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:39:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2286 transitions. [2020-09-25 05:39:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 05:39:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:39:01,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:39:01,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:39:01,783 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:39:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:39:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1945552283, now seen corresponding path program 1 times [2020-09-25 05:39:01,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:39:01,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399318685] [2020-09-25 05:39:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:39:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:02,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:02,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:02,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-25 05:39:04,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:39:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-09-25 05:39:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:04,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:39:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-25 05:39:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 05:39:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:04,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:39:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:04,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:04,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:04,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:39:04,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:04,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:39:04,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:04,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:04,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:39:04,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:04,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:39:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:04,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:39:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:04,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:04,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:04,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 05:39:04,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:04,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-09-25 05:39:04,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:04,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:39:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 05:39:04,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:39:04,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399318685] [2020-09-25 05:39:04,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:39:04,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:39:04,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167211193] [2020-09-25 05:39:04,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:39:04,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:39:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:39:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:39:04,911 INFO L87 Difference]: Start difference. First operand 1780 states and 2286 transitions. Second operand 6 states. [2020-09-25 05:39:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:39:07,538 INFO L93 Difference]: Finished difference Result 4368 states and 5812 transitions. [2020-09-25 05:39:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:39:07,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-09-25 05:39:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:39:07,556 INFO L225 Difference]: With dead ends: 4368 [2020-09-25 05:39:07,556 INFO L226 Difference]: Without dead ends: 2603 [2020-09-25 05:39:07,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:39:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-09-25 05:39:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2543. [2020-09-25 05:39:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2543 states. [2020-09-25 05:39:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3296 transitions. [2020-09-25 05:39:07,665 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3296 transitions. Word has length 135 [2020-09-25 05:39:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:39:07,666 INFO L479 AbstractCegarLoop]: Abstraction has 2543 states and 3296 transitions. [2020-09-25 05:39:07,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:39:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3296 transitions. [2020-09-25 05:39:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 05:39:07,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:39:07,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:39:07,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:39:07,672 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:39:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:39:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -430110481, now seen corresponding path program 1 times [2020-09-25 05:39:07,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:39:07,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943890894] [2020-09-25 05:39:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:39:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:08,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:11,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:11,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 05:39:11,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:39:11,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3850 [2020-09-25 05:39:11,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:11,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:11,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:39:11,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-09-25 05:39:11,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 05:39:11,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:11,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:39:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:11,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:11,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:39:11,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:11,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 05:39:11,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:11,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:39:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:11,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:39:11,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:11,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:39:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:11,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:11,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 05:39:11,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-25 05:39:11,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:11,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:39:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 05:39:11,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:39:11,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943890894] [2020-09-25 05:39:11,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:39:11,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:39:11,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481002324] [2020-09-25 05:39:11,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:39:11,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:39:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:39:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:39:11,875 INFO L87 Difference]: Start difference. First operand 2543 states and 3296 transitions. Second operand 5 states. [2020-09-25 05:39:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:39:14,094 INFO L93 Difference]: Finished difference Result 6068 states and 7972 transitions. [2020-09-25 05:39:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:39:14,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 05:39:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:39:14,113 INFO L225 Difference]: With dead ends: 6068 [2020-09-25 05:39:14,113 INFO L226 Difference]: Without dead ends: 3540 [2020-09-25 05:39:14,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:39:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2020-09-25 05:39:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3496. [2020-09-25 05:39:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3496 states. [2020-09-25 05:39:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 4582 transitions. [2020-09-25 05:39:14,241 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 4582 transitions. Word has length 152 [2020-09-25 05:39:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:39:14,241 INFO L479 AbstractCegarLoop]: Abstraction has 3496 states and 4582 transitions. [2020-09-25 05:39:14,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:39:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 4582 transitions. [2020-09-25 05:39:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-25 05:39:14,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:39:14,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:39:14,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:39:14,247 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:39:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:39:14,247 INFO L82 PathProgramCache]: Analyzing trace with hash -116686912, now seen corresponding path program 1 times [2020-09-25 05:39:14,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:39:14,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136331501] [2020-09-25 05:39:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:39:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:14,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:19,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-25 05:39:19,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 05:39:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4851 [2020-09-25 05:39:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:19,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:39:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 142 [2020-09-25 05:39:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 05:39:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:19,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:39:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:19,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:19,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:19,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:39:19,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:39:19,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:19,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:39:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:39:19,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:39:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:19,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:19,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 05:39:19,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:19,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-25 05:39:19,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:19,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:39:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 05:39:19,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:39:19,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136331501] [2020-09-25 05:39:19,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:39:19,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:39:19,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848407578] [2020-09-25 05:39:19,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:39:19,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:39:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:39:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:39:19,513 INFO L87 Difference]: Start difference. First operand 3496 states and 4582 transitions. Second operand 5 states. [2020-09-25 05:39:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:39:22,067 INFO L93 Difference]: Finished difference Result 7977 states and 10567 transitions. [2020-09-25 05:39:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:39:22,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-09-25 05:39:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:39:22,103 INFO L225 Difference]: With dead ends: 7977 [2020-09-25 05:39:22,103 INFO L226 Difference]: Without dead ends: 4496 [2020-09-25 05:39:22,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:39:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2020-09-25 05:39:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4454. [2020-09-25 05:39:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4454 states. [2020-09-25 05:39:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4454 states to 4454 states and 5891 transitions. [2020-09-25 05:39:22,314 INFO L78 Accepts]: Start accepts. Automaton has 4454 states and 5891 transitions. Word has length 171 [2020-09-25 05:39:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:39:22,314 INFO L479 AbstractCegarLoop]: Abstraction has 4454 states and 5891 transitions. [2020-09-25 05:39:22,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:39:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states and 5891 transitions. [2020-09-25 05:39:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 05:39:22,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:39:22,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:39:22,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:39:22,319 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:39:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:39:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1197072216, now seen corresponding path program 1 times [2020-09-25 05:39:22,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:39:22,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86309795] [2020-09-25 05:39:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:39:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:22,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:24,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:24,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:27,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:27,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 05:39:27,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:39:27,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4830 [2020-09-25 05:39:27,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:27,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:39:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-09-25 05:39:27,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 05:39:27,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:39:27,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:39:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:27,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:27,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 05:39:27,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:27,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:39:27,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:27,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:39:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:39:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:39:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 05:39:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:39:27,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:39:27,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:39:27,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-25 05:39:27,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:39:27,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 05:39:27,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:39:27,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:39:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:39:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:39:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 05:39:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:39:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:39:27,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86309795] [2020-09-25 05:39:27,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:39:27,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:39:27,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755625931] [2020-09-25 05:39:27,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:39:27,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:39:27,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:39:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:39:27,481 INFO L87 Difference]: Start difference. First operand 4454 states and 5891 transitions. Second operand 5 states.