/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=0.2 --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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:29:54,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:29:54,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:29:54,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:29:54,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:29:54,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:29:54,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:29:54,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:29:54,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:29:54,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:29:54,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:29:54,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:29:54,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:29:54,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:29:54,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:29:54,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:29:54,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:29:54,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:29:54,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:29:54,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:29:54,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:29:54,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:29:54,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:29:54,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:29:54,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:29:54,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:29:54,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:29:54,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:29:54,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:29:54,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:29:54,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:29:54,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:29:54,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:29:54,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:29:54,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:29:54,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:29:54,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:29:54,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:29:54,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:29:54,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:29:54,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:29:54,503 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 04:29:54,530 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:29:54,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:29:54,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:29:54,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:29:54,532 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:29:54,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:29:54,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:29:54,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:29:54,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:29:54,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:29:54,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:29:54,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:29:54,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:29:54,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:29:54,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:29:54,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:29:54,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:29:54,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:29:54,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:29:54,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:29:54,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:29:54,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:29:54,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:29:54,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:29:54,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:29:54,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:29:54,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:29:54,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:29:54,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:29:54,537 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:29:55,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:29:55,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:29:55,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:29:55,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:29:55,043 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:29:55,044 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-09-25 04:29:55,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b790ee980/4b1dbfe1c928437e8356fc2767e0de09/FLAGce1d268ff [2020-09-25 04:29:55,843 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:29:55,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-09-25 04:29:55,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b790ee980/4b1dbfe1c928437e8356fc2767e0de09/FLAGce1d268ff [2020-09-25 04:29:56,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b790ee980/4b1dbfe1c928437e8356fc2767e0de09 [2020-09-25 04:29:56,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:29:56,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:29:56,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:29:56,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:29:56,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:29:56,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5f9fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56, skipping insertion in model container [2020-09-25 04:29:56,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:29:56,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:29:56,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:29:56,767 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:29:56,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:29:56,887 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:29:56,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56 WrapperNode [2020-09-25 04:29:56,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:29:56,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:29:56,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:29:56,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:29:56,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:56,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (1/1) ... [2020-09-25 04:29:57,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:29:57,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:29:57,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:29:57,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:29:57,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (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 04:29:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:29:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:29:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 04:29:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:29:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 04:29:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:29:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:29:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 04:29:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:29:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:29:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:29:58,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:29:58,595 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:29:58,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:29:58 BoogieIcfgContainer [2020-09-25 04:29:58,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:29:58,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:29:58,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:29:58,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:29:58,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:29:56" (1/3) ... [2020-09-25 04:29:58,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7035905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:29:58, skipping insertion in model container [2020-09-25 04:29:58,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:56" (2/3) ... [2020-09-25 04:29:58,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7035905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:29:58, skipping insertion in model container [2020-09-25 04:29:58,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:29:58" (3/3) ... [2020-09-25 04:29:58,618 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label17.c [2020-09-25 04:29:58,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:29:58,643 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:29:58,668 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:29:58,706 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:29:58,707 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:29:58,707 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:29:58,707 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:29:58,707 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:29:58,707 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:29:58,707 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:29:58,708 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:29:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-25 04:29:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 04:29:58,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:58,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:58,752 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -796596049, now seen corresponding path program 1 times [2020-09-25 04:29:58,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:58,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086755843] [2020-09-25 04:29:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:59,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:59,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 04:29:59,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:29:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-09-25 04:29:59,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:59,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:59,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:29:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 04:29:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 04:29:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:29:59,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:59,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:59,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:59,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:29:59,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 04:29:59,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:59,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:59,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:59,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:29:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:59,988 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 04:29:59,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086755843] [2020-09-25 04:29:59,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:29:59,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:29:59,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479766327] [2020-09-25 04:30:00,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:30:00,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:30:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:30:00,023 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-25 04:30:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:02,244 INFO L93 Difference]: Finished difference Result 1104 states and 1521 transitions. [2020-09-25 04:30:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:30:02,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-09-25 04:30:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:02,277 INFO L225 Difference]: With dead ends: 1104 [2020-09-25 04:30:02,278 INFO L226 Difference]: Without dead ends: 578 [2020-09-25 04:30:02,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 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 04:30:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-09-25 04:30:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 544. [2020-09-25 04:30:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-09-25 04:30:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 655 transitions. [2020-09-25 04:30:02,391 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 655 transitions. Word has length 49 [2020-09-25 04:30:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:02,392 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 655 transitions. [2020-09-25 04:30:02,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:30:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 655 transitions. [2020-09-25 04:30:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-25 04:30:02,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:02,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:02,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:30:02,400 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1427265920, now seen corresponding path program 1 times [2020-09-25 04:30:02,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:02,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436123768] [2020-09-25 04:30:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:02,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:02,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:03,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:03,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:07,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:07,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-25 04:30:07,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:30:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 04:30:07,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:07,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-09-25 04:30:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:30:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:07,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:30:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:07,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:30:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:30:07,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:07,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:30:07,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:07,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:30:07,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:30:07,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 04:30:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:07,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:07,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:07,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 04:30:07,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-25 04:30:07,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:07,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:30:07,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:07,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 04:30:07,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:30:07,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436123768] [2020-09-25 04:30:07,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:30:07,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:30:07,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003358050] [2020-09-25 04:30:07,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:30:07,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:30:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:30:07,831 INFO L87 Difference]: Start difference. First operand 544 states and 655 transitions. Second operand 5 states. [2020-09-25 04:30:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:09,807 INFO L93 Difference]: Finished difference Result 1224 states and 1530 transitions. [2020-09-25 04:30:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:30:09,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-09-25 04:30:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:09,813 INFO L225 Difference]: With dead ends: 1224 [2020-09-25 04:30:09,813 INFO L226 Difference]: Without dead ends: 695 [2020-09-25 04:30:09,817 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 04:30:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-09-25 04:30:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2020-09-25 04:30:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-09-25 04:30:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 850 transitions. [2020-09-25 04:30:09,853 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 850 transitions. Word has length 128 [2020-09-25 04:30:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:09,854 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 850 transitions. [2020-09-25 04:30:09,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:30:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 850 transitions. [2020-09-25 04:30:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-25 04:30:09,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:09,862 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:09,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:30:09,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash -863517790, now seen corresponding path program 1 times [2020-09-25 04:30:09,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:09,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716205944] [2020-09-25 04:30:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:10,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:10,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:14,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:14,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-09-25 04:30:14,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:30:14,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 04:30:14,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:14,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:14,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:14,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-25 04:30:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 04:30:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:30:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:30:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:15,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:15,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:15,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:30:15,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:15,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:30:15,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:15,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:15,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:30:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:15,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:30:15,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:15,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 04:30:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:15,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:15,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 04:30:15,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:15,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-25 04:30:15,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:15,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:15,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:30:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-25 04:30:15,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:30:15,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716205944] [2020-09-25 04:30:15,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:30:15,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 04:30:15,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363939082] [2020-09-25 04:30:15,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 04:30:15,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 04:30:15,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:30:15,232 INFO L87 Difference]: Start difference. First operand 695 states and 850 transitions. Second operand 6 states. [2020-09-25 04:30:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:17,800 INFO L93 Difference]: Finished difference Result 1843 states and 2430 transitions. [2020-09-25 04:30:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 04:30:17,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2020-09-25 04:30:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:17,816 INFO L225 Difference]: With dead ends: 1843 [2020-09-25 04:30:17,816 INFO L226 Difference]: Without dead ends: 1313 [2020-09-25 04:30:17,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:30:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-09-25 04:30:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1303. [2020-09-25 04:30:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1303 states. [2020-09-25 04:30:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1651 transitions. [2020-09-25 04:30:17,886 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1651 transitions. Word has length 138 [2020-09-25 04:30:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:17,887 INFO L479 AbstractCegarLoop]: Abstraction has 1303 states and 1651 transitions. [2020-09-25 04:30:17,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 04:30:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1651 transitions. [2020-09-25 04:30:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-09-25 04:30:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:17,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:17,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:30:17,900 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 963100078, now seen corresponding path program 1 times [2020-09-25 04:30:17,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:17,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300757382] [2020-09-25 04:30:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:18,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:18,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:19,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:22,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:22,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:22,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:22,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-09-25 04:30:22,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:30:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 04:30:22,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:22,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-09-25 04:30:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-09-25 04:30:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:30:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:30:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:23,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:23,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:30:23,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:30:23,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:23,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:23,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:30:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:30:23,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 04:30:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:23,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:23,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 04:30:23,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 04:30:23,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:23,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:30:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 04:30:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:23,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-25 04:30:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:23,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:23,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:23,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-25 04:30:23,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:23,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-09-25 04:30:23,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:23,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:23,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:23,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:30:23,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 04:30:23,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:30:23,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300757382] [2020-09-25 04:30:23,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:30:23,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 04:30:23,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37458673] [2020-09-25 04:30:23,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:30:23,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:30:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:30:23,754 INFO L87 Difference]: Start difference. First operand 1303 states and 1651 transitions. Second operand 8 states. [2020-09-25 04:30:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:26,796 INFO L93 Difference]: Finished difference Result 2609 states and 3347 transitions. [2020-09-25 04:30:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 04:30:26,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 273 [2020-09-25 04:30:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:26,810 INFO L225 Difference]: With dead ends: 2609 [2020-09-25 04:30:26,810 INFO L226 Difference]: Without dead ends: 1115 [2020-09-25 04:30:26,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:30:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-09-25 04:30:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1111. [2020-09-25 04:30:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-09-25 04:30:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1272 transitions. [2020-09-25 04:30:26,864 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1272 transitions. Word has length 273 [2020-09-25 04:30:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:26,865 INFO L479 AbstractCegarLoop]: Abstraction has 1111 states and 1272 transitions. [2020-09-25 04:30:26,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:30:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1272 transitions. [2020-09-25 04:30:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-09-25 04:30:26,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:26,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:26,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:30:26,874 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1401759114, now seen corresponding path program 1 times [2020-09-25 04:30:26,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:26,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564464412] [2020-09-25 04:30:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:26,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:27,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:29,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:31,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:31,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-09-25 04:30:31,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:30:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 04:30:31,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:31,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:31,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:31,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-09-25 04:30:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 04:30:31,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:31,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:30:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:32,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:32,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:32,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:30:32,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:32,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:30:32,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:32,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:30:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:30:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:32,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 04:30:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:32,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:32,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:32,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 04:30:32,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 04:30:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:32,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:30:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-25 04:30:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:32,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-25 04:30:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:32,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:32,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:32,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-25 04:30:32,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-09-25 04:30:32,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:32,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:32,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:32,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:30:32,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 04:30:32,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:30:32,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564464412] [2020-09-25 04:30:32,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:30:32,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:30:32,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116016029] [2020-09-25 04:30:32,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:30:32,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:32,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:30:32,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:30:32,578 INFO L87 Difference]: Start difference. First operand 1111 states and 1272 transitions. Second operand 7 states. [2020-09-25 04:30:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:34,472 INFO L93 Difference]: Finished difference Result 2417 states and 2829 transitions. [2020-09-25 04:30:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:30:34,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 275 [2020-09-25 04:30:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:34,481 INFO L225 Difference]: With dead ends: 2417 [2020-09-25 04:30:34,482 INFO L226 Difference]: Without dead ends: 1471 [2020-09-25 04:30:34,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:30:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2020-09-25 04:30:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1435. [2020-09-25 04:30:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-09-25 04:30:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1638 transitions. [2020-09-25 04:30:34,542 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1638 transitions. Word has length 275 [2020-09-25 04:30:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:34,542 INFO L479 AbstractCegarLoop]: Abstraction has 1435 states and 1638 transitions. [2020-09-25 04:30:34,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:30:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1638 transitions. [2020-09-25 04:30:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-09-25 04:30:34,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:34,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:34,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:30:34,550 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1206896567, now seen corresponding path program 1 times [2020-09-25 04:30:34,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:34,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754114090] [2020-09-25 04:30:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:34,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:35,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:39,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:39,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:39,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-09-25 04:30:39,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:30:39,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 04:30:39,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:39,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-09-25 04:30:39,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-09-25 04:30:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:39,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:30:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:39,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:39,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:30:39,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:30:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:39,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:30:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:30:39,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 04:30:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:39,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:39,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:39,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 04:30:39,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:39,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 04:30:39,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:39,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:30:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:30:39,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 04:30:39,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:30:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-25 04:30:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:40,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:30:40,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-25 04:30:40,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:30:40,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-09-25 04:30:40,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:30:40,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:30:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:30:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:30:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 04:30:40,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:30:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:30:40,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754114090] [2020-09-25 04:30:40,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:30:40,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:30:40,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487375308] [2020-09-25 04:30:40,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:30:40,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:30:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:30:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:30:40,243 INFO L87 Difference]: Start difference. First operand 1435 states and 1638 transitions. Second operand 7 states. [2020-09-25 04:30:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:30:42,276 INFO L93 Difference]: Finished difference Result 2893 states and 3355 transitions. [2020-09-25 04:30:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:30:42,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-09-25 04:30:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:30:42,286 INFO L225 Difference]: With dead ends: 2893 [2020-09-25 04:30:42,286 INFO L226 Difference]: Without dead ends: 1623 [2020-09-25 04:30:42,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:30:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2020-09-25 04:30:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1593. [2020-09-25 04:30:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-09-25 04:30:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1815 transitions. [2020-09-25 04:30:42,342 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1815 transitions. Word has length 279 [2020-09-25 04:30:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:30:42,344 INFO L479 AbstractCegarLoop]: Abstraction has 1593 states and 1815 transitions. [2020-09-25 04:30:42,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:30:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1815 transitions. [2020-09-25 04:30:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-25 04:30:42,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:30:42,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 04:30:42,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:30:42,361 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:30:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:30:42,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2039135642, now seen corresponding path program 1 times [2020-09-25 04:30:42,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:30:42,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360920146] [2020-09-25 04:30:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:30:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:30:42,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:42,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:30:43,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking...