/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:30:13,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:30:13,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:30:13,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:30:13,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:30:13,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:30:13,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:30:13,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:30:13,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:30:13,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:30:13,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:30:13,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:30:13,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:30:13,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:30:13,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:30:13,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:30:13,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:30:13,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:30:13,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:30:13,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:30:13,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:30:13,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:30:13,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:30:13,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:30:13,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:30:13,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:30:13,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:30:13,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:30:13,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:30:13,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:30:13,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:30:13,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:30:13,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:30:13,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:30:13,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:30:13,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:30:13,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:30:13,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:30:13,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:30:13,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:30:13,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:30:13,959 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 [2020-09-24 19:30:13,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:30:13,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:30:13,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:30:13,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:30:13,989 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:30:13,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:30:13,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:30:13,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:30:13,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:30:13,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:30:13,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:30:13,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:30:13,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:30:13,991 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:30:13,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:30:13,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:30:13,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:30:13,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:30:13,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:30:13,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:30:13,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:30:13,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:30:13,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:30:13,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:30:13,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:30:13,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:30:13,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:30:13,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:30:13,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:30:13,999 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:30:14,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:30:14,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:30:14,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:30:14,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:30:14,489 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:30:14,490 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 19:30:14,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815027e80/8e5b7ff21d8f4306b17b804eeabe5257/FLAGf3409178f [2020-09-24 19:30:15,284 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:30:15,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 19:30:15,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815027e80/8e5b7ff21d8f4306b17b804eeabe5257/FLAGf3409178f [2020-09-24 19:30:15,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815027e80/8e5b7ff21d8f4306b17b804eeabe5257 [2020-09-24 19:30:15,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:30:15,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:30:15,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:30:15,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:30:15,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:30:15,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:30:15" (1/1) ... [2020-09-24 19:30:15,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:15, skipping insertion in model container [2020-09-24 19:30:15,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:30:15" (1/1) ... [2020-09-24 19:30:15,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:30:15,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:30:16,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:30:16,570 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:30:16,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:30:16,839 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:30:16,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16 WrapperNode [2020-09-24 19:30:16,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:30:16,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:30:16,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:30:16,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:30:16,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:16,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:16,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:16,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:16,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:17,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:17,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (1/1) ... [2020-09-24 19:30:17,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:30:17,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:30:17,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:30:17,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:30:17,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (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 [2020-09-24 19:30:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:30:17,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:30:17,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 19:30:17,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:30:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 19:30:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:30:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:30:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 19:30:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:30:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:30:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:30:19,563 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:30:19,564 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:30:19,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:30:19 BoogieIcfgContainer [2020-09-24 19:30:19,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:30:19,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:30:19,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:30:19,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:30:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:30:15" (1/3) ... [2020-09-24 19:30:19,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5daf7063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:30:19, skipping insertion in model container [2020-09-24 19:30:19,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:30:16" (2/3) ... [2020-09-24 19:30:19,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5daf7063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:30:19, skipping insertion in model container [2020-09-24 19:30:19,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:30:19" (3/3) ... [2020-09-24 19:30:19,586 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-24 19:30:19,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:30:19,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:30:19,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:30:19,670 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:30:19,671 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:30:19,671 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:30:19,671 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:30:19,671 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:30:19,672 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:30:19,672 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:30:19,672 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:30:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 19:30:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 19:30:19,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:19,722 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, 1, 1, 1, 1, 1, 1] [2020-09-24 19:30:19,723 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-09-24 19:30:19,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:19,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181928973] [2020-09-24 19:30:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:20,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:20,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:20,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:30:20,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:30:20,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-24 19:30:20,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:30:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:30:20,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 19:30:20,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:30:21,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:21,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:21,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 19:30:21,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:30:21,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:30:21,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181928973] [2020-09-24 19:30:21,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:30:21,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:30:21,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613669881] [2020-09-24 19:30:21,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:30:21,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:30:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:30:21,252 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 4 states. [2020-09-24 19:30:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:25,351 INFO L93 Difference]: Finished difference Result 2039 states and 2640 transitions. [2020-09-24 19:30:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:30:25,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-09-24 19:30:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:25,388 INFO L225 Difference]: With dead ends: 2039 [2020-09-24 19:30:25,388 INFO L226 Difference]: Without dead ends: 1170 [2020-09-24 19:30:25,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:30:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-09-24 19:30:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 959. [2020-09-24 19:30:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-09-24 19:30:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1158 transitions. [2020-09-24 19:30:25,570 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1158 transitions. Word has length 55 [2020-09-24 19:30:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:25,571 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1158 transitions. [2020-09-24 19:30:25,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:30:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1158 transitions. [2020-09-24 19:30:25,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 19:30:25,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:25,588 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, 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] [2020-09-24 19:30:25,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:30:25,588 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash 736411249, now seen corresponding path program 1 times [2020-09-24 19:30:25,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:25,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296410183] [2020-09-24 19:30:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:26,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:26,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:26,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-24 19:30:26,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:30:26,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:30:26,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:26,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:30:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:30:26,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 19:30:26,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:26,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:26,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:26,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:26,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:26,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:26,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 19:30:26,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:26,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:26,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:30:26,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:30:26,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:26,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:27,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:27,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 19:30:27,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:27,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-09-24 19:30:27,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:30:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 19:30:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:30:27,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296410183] [2020-09-24 19:30:27,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:30:27,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:30:27,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603077022] [2020-09-24 19:30:27,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:30:27,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:30:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:30:27,400 INFO L87 Difference]: Start difference. First operand 959 states and 1158 transitions. Second operand 7 states. [2020-09-24 19:30:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:31,501 INFO L93 Difference]: Finished difference Result 2335 states and 2942 transitions. [2020-09-24 19:30:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 19:30:31,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-09-24 19:30:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:31,512 INFO L225 Difference]: With dead ends: 2335 [2020-09-24 19:30:31,512 INFO L226 Difference]: Without dead ends: 1393 [2020-09-24 19:30:31,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:30:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2020-09-24 19:30:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1361. [2020-09-24 19:30:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1361 states. [2020-09-24 19:30:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1642 transitions. [2020-09-24 19:30:31,585 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1642 transitions. Word has length 136 [2020-09-24 19:30:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:31,590 INFO L479 AbstractCegarLoop]: Abstraction has 1361 states and 1642 transitions. [2020-09-24 19:30:31,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:30:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1642 transitions. [2020-09-24 19:30:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 19:30:31,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:31,598 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, 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] [2020-09-24 19:30:31,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:30:31,599 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1577360409, now seen corresponding path program 1 times [2020-09-24 19:30:31,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:31,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561941372] [2020-09-24 19:30:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:31,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-24 19:30:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:30:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:30:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-09-24 19:30:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 19:30:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:32,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:32,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:32,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:32,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:30:32,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:32,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:32,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:32,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:30:32,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:32,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:32,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:32,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 19:30:32,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-24 19:30:32,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 19:30:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:30:33,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561941372] [2020-09-24 19:30:33,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:30:33,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:30:33,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455516385] [2020-09-24 19:30:33,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:30:33,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:33,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:30:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:30:33,025 INFO L87 Difference]: Start difference. First operand 1361 states and 1642 transitions. Second operand 5 states. [2020-09-24 19:30:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:38,849 INFO L93 Difference]: Finished difference Result 3593 states and 4486 transitions. [2020-09-24 19:30:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:30:38,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-09-24 19:30:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:38,864 INFO L225 Difference]: With dead ends: 3593 [2020-09-24 19:30:38,864 INFO L226 Difference]: Without dead ends: 2249 [2020-09-24 19:30:38,870 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 [2020-09-24 19:30:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2020-09-24 19:30:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2210. [2020-09-24 19:30:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2210 states. [2020-09-24 19:30:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 2753 transitions. [2020-09-24 19:30:38,940 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 2753 transitions. Word has length 141 [2020-09-24 19:30:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:38,941 INFO L479 AbstractCegarLoop]: Abstraction has 2210 states and 2753 transitions. [2020-09-24 19:30:38,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:30:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 2753 transitions. [2020-09-24 19:30:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 19:30:38,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:38,945 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, 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] [2020-09-24 19:30:38,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:30:38,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1315254815, now seen corresponding path program 1 times [2020-09-24 19:30:38,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:38,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46565971] [2020-09-24 19:30:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:39,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:39,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:39,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:40,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:40,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-09-24 19:30:40,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:30:40,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-09-24 19:30:40,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:40,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-09-24 19:30:40,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 19:30:40,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 19:30:40,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:40,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:40,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:40,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:30:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:40,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:40,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:40,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:40,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 19:30:40,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-24 19:30:40,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 19:30:40,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:30:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46565971] [2020-09-24 19:30:40,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:30:40,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:30:40,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868508999] [2020-09-24 19:30:40,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:30:40,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:30:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:30:40,548 INFO L87 Difference]: Start difference. First operand 2210 states and 2753 transitions. Second operand 5 states. [2020-09-24 19:30:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:44,444 INFO L93 Difference]: Finished difference Result 5085 states and 6449 transitions. [2020-09-24 19:30:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:30:44,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-09-24 19:30:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:44,465 INFO L225 Difference]: With dead ends: 5085 [2020-09-24 19:30:44,465 INFO L226 Difference]: Without dead ends: 2892 [2020-09-24 19:30:44,473 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 [2020-09-24 19:30:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2020-09-24 19:30:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2852. [2020-09-24 19:30:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2020-09-24 19:30:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3618 transitions. [2020-09-24 19:30:44,572 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3618 transitions. Word has length 190 [2020-09-24 19:30:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:44,573 INFO L479 AbstractCegarLoop]: Abstraction has 2852 states and 3618 transitions. [2020-09-24 19:30:44,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:30:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3618 transitions. [2020-09-24 19:30:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-24 19:30:44,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:44,579 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:30:44,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:30:44,579 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash 183139272, now seen corresponding path program 1 times [2020-09-24 19:30:44,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:44,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177693843] [2020-09-24 19:30:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:44,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:45,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-09-24 19:30:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:30:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-24 19:30:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-24 19:30:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 19:30:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:45,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:45,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:45,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:45,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:45,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:30:45,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:45,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:46,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:46,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-24 19:30:46,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:46,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-09-24 19:30:46,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:46,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:46,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:46,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 19:30:46,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:30:46,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177693843] [2020-09-24 19:30:46,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:30:46,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:30:46,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303953619] [2020-09-24 19:30:46,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:30:46,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:30:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:30:46,196 INFO L87 Difference]: Start difference. First operand 2852 states and 3618 transitions. Second operand 5 states. [2020-09-24 19:30:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:49,914 INFO L93 Difference]: Finished difference Result 6907 states and 8770 transitions. [2020-09-24 19:30:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:30:49,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-09-24 19:30:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:49,940 INFO L225 Difference]: With dead ends: 6907 [2020-09-24 19:30:49,941 INFO L226 Difference]: Without dead ends: 4072 [2020-09-24 19:30:49,952 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 [2020-09-24 19:30:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2020-09-24 19:30:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 3062. [2020-09-24 19:30:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3062 states. [2020-09-24 19:30:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 3912 transitions. [2020-09-24 19:30:50,052 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 3912 transitions. Word has length 211 [2020-09-24 19:30:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:50,053 INFO L479 AbstractCegarLoop]: Abstraction has 3062 states and 3912 transitions. [2020-09-24 19:30:50,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:30:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 3912 transitions. [2020-09-24 19:30:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-24 19:30:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:50,058 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:30:50,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:30:50,059 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1498328372, now seen corresponding path program 1 times [2020-09-24 19:30:50,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:50,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155945892] [2020-09-24 19:30:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:50,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:51,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:51,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-09-24 19:30:51,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:30:51,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-24 19:30:51,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-09-24 19:30:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 19:30:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:51,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:51,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:51,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:30:51,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:51,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:51,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:51,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:51,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 19:30:51,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 19:30:51,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:30:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 19:30:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-24 19:30:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:51,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:51,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 19:30:51,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:51,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-24 19:30:51,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:51,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:51,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:30:51,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 19:30:51,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:30:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:30:51,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155945892] [2020-09-24 19:30:51,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:30:51,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:30:51,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513799330] [2020-09-24 19:30:51,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:30:51,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:30:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:30:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:30:51,683 INFO L87 Difference]: Start difference. First operand 3062 states and 3912 transitions. Second operand 7 states. [2020-09-24 19:30:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:30:58,211 INFO L93 Difference]: Finished difference Result 8788 states and 12467 transitions. [2020-09-24 19:30:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:30:58,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-09-24 19:30:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:30:58,250 INFO L225 Difference]: With dead ends: 8788 [2020-09-24 19:30:58,251 INFO L226 Difference]: Without dead ends: 5743 [2020-09-24 19:30:58,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:30:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5743 states. [2020-09-24 19:30:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5743 to 5448. [2020-09-24 19:30:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5448 states. [2020-09-24 19:30:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 7136 transitions. [2020-09-24 19:30:58,449 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 7136 transitions. Word has length 223 [2020-09-24 19:30:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:30:58,450 INFO L479 AbstractCegarLoop]: Abstraction has 5448 states and 7136 transitions. [2020-09-24 19:30:58,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:30:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 7136 transitions. [2020-09-24 19:30:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 19:30:58,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:30:58,457 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:30:58,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:30:58,458 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:30:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:30:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash -770206682, now seen corresponding path program 1 times [2020-09-24 19:30:58,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:30:58,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541825891] [2020-09-24 19:30:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:30:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:58,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:59,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-24 19:30:59,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:30:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-09-24 19:30:59,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:30:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-09-24 19:30:59,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 19:30:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:59,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:30:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:59,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:59,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:30:59,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:59,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:30:59,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:59,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:30:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:30:59,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:30:59,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 19:30:59,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:30:59,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 19:30:59,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:30:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:30:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:30:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:30:59,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:30:59,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-24 19:30:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:30:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:00,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:31:00,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 19:31:00,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:31:00,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-24 19:31:00,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:31:00,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:31:00,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:31:00,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 19:31:00,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:31:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-24 19:31:00,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541825891] [2020-09-24 19:31:00,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:31:00,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:31:00,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061778126] [2020-09-24 19:31:00,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:31:00,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:31:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:31:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:31:00,115 INFO L87 Difference]: Start difference. First operand 5448 states and 7136 transitions. Second operand 5 states. [2020-09-24 19:31:04,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:31:04,542 INFO L93 Difference]: Finished difference Result 12848 states and 17172 transitions. [2020-09-24 19:31:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:31:04,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-09-24 19:31:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:31:04,580 INFO L225 Difference]: With dead ends: 12848 [2020-09-24 19:31:04,580 INFO L226 Difference]: Without dead ends: 7668 [2020-09-24 19:31:04,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:31:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2020-09-24 19:31:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 6856. [2020-09-24 19:31:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6856 states. [2020-09-24 19:31:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6856 states to 6856 states and 9154 transitions. [2020-09-24 19:31:04,794 INFO L78 Accepts]: Start accepts. Automaton has 6856 states and 9154 transitions. Word has length 225 [2020-09-24 19:31:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:31:04,794 INFO L479 AbstractCegarLoop]: Abstraction has 6856 states and 9154 transitions. [2020-09-24 19:31:04,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:31:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6856 states and 9154 transitions. [2020-09-24 19:31:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-24 19:31:04,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:31:04,803 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:31:04,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:31:04,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:31:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:31:04,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2099303587, now seen corresponding path program 1 times [2020-09-24 19:31:04,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:31:04,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452082692] [2020-09-24 19:31:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:31:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:31:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:05,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:05,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:31:05,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-09-24 19:31:05,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:31:05,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-24 19:31:05,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:31:05,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:31:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-24 19:31:05,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 19:31:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:31:05,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:31:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:31:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:06,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:31:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:31:06,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:31:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:31:06,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:31:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:31:06,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:31:06,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:31:06,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:31:06,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 19:31:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:31:06,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:06,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:31:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 19:31:06,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:31:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 19:31:06,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:31:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:31:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:31:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 19:31:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:31:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-24 19:31:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:31:06,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:31:06,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:31:06,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 19:31:06,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:31:06,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-09-24 19:31:06,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:31:06,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:31:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:31:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-24 19:31:06,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:31:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:31:06,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452082692] [2020-09-24 19:31:06,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:31:06,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:31:06,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738603474] [2020-09-24 19:31:06,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:31:06,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:31:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:31:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:31:06,577 INFO L87 Difference]: Start difference. First operand 6856 states and 9154 transitions. Second operand 7 states.