/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=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/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:26:02,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:26:02,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:26:02,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:26:02,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:26:02,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:26:02,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:26:02,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:26:02,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:26:02,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:26:02,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:26:02,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:26:02,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:26:02,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:26:02,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:26:02,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:26:02,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:26:02,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:26:02,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:26:02,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:26:02,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:26:02,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:26:02,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:26:02,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:26:02,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:26:02,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:26:02,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:26:02,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:26:02,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:26:02,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:26:02,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:26:02,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:26:02,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:26:02,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:26:02,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:26:02,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:26:02,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:26:02,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:26:02,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:26:02,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:26:02,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:26:02,296 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 18:26:02,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:26:02,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:26:02,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:26:02,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:26:02,345 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:26:02,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:26:02,346 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:26:02,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:26:02,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:26:02,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:26:02,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:26:02,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:26:02,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:26:02,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:26:02,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:26:02,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:26:02,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:26:02,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:26:02,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:26:02,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:26:02,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:26:02,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:26:02,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:26:02,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:26:02,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:26:02,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:26:02,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:26:02,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:26:02,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:26:02,355 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=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=5000;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=5000;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=5000;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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:26:02,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:26:02,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:26:02,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:26:02,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:26:02,814 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:26:02,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-09-24 18:26:02,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ddd2e087/d8d67f7f49bf496aa27d07b7de900173/FLAG7a93e15e8 [2020-09-24 18:26:03,602 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:26:03,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-09-24 18:26:03,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ddd2e087/d8d67f7f49bf496aa27d07b7de900173/FLAG7a93e15e8 [2020-09-24 18:26:03,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ddd2e087/d8d67f7f49bf496aa27d07b7de900173 [2020-09-24 18:26:03,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:26:03,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:26:03,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:26:03,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:26:03,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:26:03,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:26:03" (1/1) ... [2020-09-24 18:26:03,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:03, skipping insertion in model container [2020-09-24 18:26:03,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:26:03" (1/1) ... [2020-09-24 18:26:03,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:26:03,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:26:04,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:26:04,598 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:26:04,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:26:04,736 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:26:04,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04 WrapperNode [2020-09-24 18:26:04,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:26:04,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:26:04,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:26:04,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:26:04,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (1/1) ... [2020-09-24 18:26:04,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:26:04,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:26:04,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:26:04,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:26:04,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (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 18:26:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:26:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:26:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:26:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:26:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:26:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:26:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:26:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:26:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:26:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:26:04,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:26:06,754 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:26:06,755 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:26:06,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:26:06 BoogieIcfgContainer [2020-09-24 18:26:06,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:26:06,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:26:06,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:26:06,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:26:06,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:26:03" (1/3) ... [2020-09-24 18:26:06,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6217c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:26:06, skipping insertion in model container [2020-09-24 18:26:06,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:26:04" (2/3) ... [2020-09-24 18:26:06,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6217c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:26:06, skipping insertion in model container [2020-09-24 18:26:06,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:26:06" (3/3) ... [2020-09-24 18:26:06,787 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-09-24 18:26:06,800 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:26:06,816 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:26:06,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:26:06,887 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:26:06,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:26:06,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:26:06,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:26:06,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:26:06,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:26:06,890 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:26:06,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:26:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 18:26:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 18:26:06,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:06,958 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, 1, 1, 1, 1, 1] [2020-09-24 18:26:06,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -444760420, now seen corresponding path program 1 times [2020-09-24 18:26:06,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:06,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697536871] [2020-09-24 18:26:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:07,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:26:07,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:26:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-09-24 18:26:07,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:07,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:26:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:26:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 18:26:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:26:08,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:08,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:08,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:08,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 18:26:08,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:26:08,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:08,163 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 18:26:08,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697536871] [2020-09-24 18:26:08,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:26:08,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:26:08,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925419538] [2020-09-24 18:26:08,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:26:08,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:26:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:26:08,200 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 4 states. [2020-09-24 18:26:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:11,107 INFO L93 Difference]: Finished difference Result 1656 states and 2196 transitions. [2020-09-24 18:26:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:26:11,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-24 18:26:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:11,143 INFO L225 Difference]: With dead ends: 1656 [2020-09-24 18:26:11,144 INFO L226 Difference]: Without dead ends: 920 [2020-09-24 18:26:11,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:11,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-09-24 18:26:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 806. [2020-09-24 18:26:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-09-24 18:26:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 969 transitions. [2020-09-24 18:26:11,274 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 969 transitions. Word has length 60 [2020-09-24 18:26:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:11,275 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 969 transitions. [2020-09-24 18:26:11,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:26:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 969 transitions. [2020-09-24 18:26:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 18:26:11,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:11,284 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, 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] [2020-09-24 18:26:11,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:26:11,284 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -681557324, now seen corresponding path program 1 times [2020-09-24 18:26:11,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:11,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500927310] [2020-09-24 18:26:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:11,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:12,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:13,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:15,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 18:26:15,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3873 [2020-09-24 18:26:15,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-09-24 18:26:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 18:26:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:15,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:15,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:15,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:15,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:26:15,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:15,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:15,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:15,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:15,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:15,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:15,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 18:26:15,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:15,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 18:26:15,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 18:26:15,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 18:26:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:15,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500927310] [2020-09-24 18:26:15,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:15,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:15,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370193959] [2020-09-24 18:26:15,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:15,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:15,499 INFO L87 Difference]: Start difference. First operand 806 states and 969 transitions. Second operand 5 states. [2020-09-24 18:26:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:18,206 INFO L93 Difference]: Finished difference Result 2007 states and 2507 transitions. [2020-09-24 18:26:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:18,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-09-24 18:26:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:18,214 INFO L225 Difference]: With dead ends: 2007 [2020-09-24 18:26:18,214 INFO L226 Difference]: Without dead ends: 1021 [2020-09-24 18:26:18,218 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 18:26:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-09-24 18:26:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 993. [2020-09-24 18:26:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-09-24 18:26:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1165 transitions. [2020-09-24 18:26:18,269 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1165 transitions. Word has length 139 [2020-09-24 18:26:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:18,270 INFO L479 AbstractCegarLoop]: Abstraction has 993 states and 1165 transitions. [2020-09-24 18:26:18,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1165 transitions. [2020-09-24 18:26:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-24 18:26:18,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:18,274 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, 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] [2020-09-24 18:26:18,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:26:18,275 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1489575125, now seen corresponding path program 1 times [2020-09-24 18:26:18,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:18,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30633175] [2020-09-24 18:26:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:18,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:19,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:19,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:21,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 18:26:21,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:21,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-09-24 18:26:21,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-09-24 18:26:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 18:26:21,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:21,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:21,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:21,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:21,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:21,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:21,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 18:26:21,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:21,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 18:26:21,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:21,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 18:26:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:21,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30633175] [2020-09-24 18:26:21,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:21,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:21,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839907465] [2020-09-24 18:26:21,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:21,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:21,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:21,926 INFO L87 Difference]: Start difference. First operand 993 states and 1165 transitions. Second operand 5 states. [2020-09-24 18:26:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:24,891 INFO L93 Difference]: Finished difference Result 2393 states and 2919 transitions. [2020-09-24 18:26:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:24,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-09-24 18:26:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:24,900 INFO L225 Difference]: With dead ends: 2393 [2020-09-24 18:26:24,900 INFO L226 Difference]: Without dead ends: 1415 [2020-09-24 18:26:24,904 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 18:26:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2020-09-24 18:26:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1375. [2020-09-24 18:26:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2020-09-24 18:26:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1641 transitions. [2020-09-24 18:26:24,946 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1641 transitions. Word has length 147 [2020-09-24 18:26:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:24,947 INFO L479 AbstractCegarLoop]: Abstraction has 1375 states and 1641 transitions. [2020-09-24 18:26:24,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1641 transitions. [2020-09-24 18:26:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 18:26:24,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:24,951 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:24,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:26:24,951 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:24,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1017458395, now seen corresponding path program 1 times [2020-09-24 18:26:24,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:24,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557805582] [2020-09-24 18:26:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:25,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:25,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:26,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:29,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:29,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 18:26:29,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:29,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4154 [2020-09-24 18:26:29,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-09-24 18:26:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 18:26:29,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:29,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:29,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:29,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:29,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:29,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:29,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:29,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:29,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:29,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:29,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 18:26:29,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:29,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 18:26:29,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 18:26:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:29,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557805582] [2020-09-24 18:26:29,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:29,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:29,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218712280] [2020-09-24 18:26:29,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:29,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:29,429 INFO L87 Difference]: Start difference. First operand 1375 states and 1641 transitions. Second operand 5 states. [2020-09-24 18:26:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:32,412 INFO L93 Difference]: Finished difference Result 3453 states and 4208 transitions. [2020-09-24 18:26:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:32,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-09-24 18:26:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:32,423 INFO L225 Difference]: With dead ends: 3453 [2020-09-24 18:26:32,424 INFO L226 Difference]: Without dead ends: 2093 [2020-09-24 18:26:32,428 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 18:26:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-09-24 18:26:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1759. [2020-09-24 18:26:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1759 states. [2020-09-24 18:26:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2125 transitions. [2020-09-24 18:26:32,480 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2125 transitions. Word has length 156 [2020-09-24 18:26:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:32,481 INFO L479 AbstractCegarLoop]: Abstraction has 1759 states and 2125 transitions. [2020-09-24 18:26:32,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2125 transitions. [2020-09-24 18:26:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-24 18:26:32,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:32,485 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, 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] [2020-09-24 18:26:32,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:26:32,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 612029555, now seen corresponding path program 1 times [2020-09-24 18:26:32,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:32,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806899155] [2020-09-24 18:26:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:33,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:34,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:34,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:37,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-24 18:26:37,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:37,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 18:26:37,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-09-24 18:26:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 18:26:37,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:37,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:37,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:37,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:37,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:26:37,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:37,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:37,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:37,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:37,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:37,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 18:26:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 18:26:37,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-24 18:26:37,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:37,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806899155] [2020-09-24 18:26:37,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:37,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:37,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660180032] [2020-09-24 18:26:37,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:37,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:37,801 INFO L87 Difference]: Start difference. First operand 1759 states and 2125 transitions. Second operand 5 states. [2020-09-24 18:26:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:40,895 INFO L93 Difference]: Finished difference Result 4237 states and 5213 transitions. [2020-09-24 18:26:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:40,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-09-24 18:26:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:40,911 INFO L225 Difference]: With dead ends: 4237 [2020-09-24 18:26:40,912 INFO L226 Difference]: Without dead ends: 2493 [2020-09-24 18:26:40,918 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 18:26:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2020-09-24 18:26:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2143. [2020-09-24 18:26:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2143 states. [2020-09-24 18:26:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 2665 transitions. [2020-09-24 18:26:40,981 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 2665 transitions. Word has length 162 [2020-09-24 18:26:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:40,981 INFO L479 AbstractCegarLoop]: Abstraction has 2143 states and 2665 transitions. [2020-09-24 18:26:40,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 2665 transitions. [2020-09-24 18:26:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 18:26:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:40,985 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, 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] [2020-09-24 18:26:40,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:26:40,985 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:40,986 INFO L82 PathProgramCache]: Analyzing trace with hash -698035219, now seen corresponding path program 1 times [2020-09-24 18:26:40,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:40,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892348731] [2020-09-24 18:26:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:41,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:44,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 18:26:44,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3722 [2020-09-24 18:26:44,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-09-24 18:26:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 18:26:44,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:44,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:44,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:26:44,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:44,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:44,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:44,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:44,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 18:26:44,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 18:26:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-24 18:26:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:44,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892348731] [2020-09-24 18:26:44,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:44,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:44,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062616839] [2020-09-24 18:26:44,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:44,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:44,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:44,988 INFO L87 Difference]: Start difference. First operand 2143 states and 2665 transitions. Second operand 5 states. [2020-09-24 18:26:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:48,068 INFO L93 Difference]: Finished difference Result 5451 states and 6991 transitions. [2020-09-24 18:26:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:48,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-09-24 18:26:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:48,087 INFO L225 Difference]: With dead ends: 5451 [2020-09-24 18:26:48,087 INFO L226 Difference]: Without dead ends: 3323 [2020-09-24 18:26:48,096 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 18:26:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2020-09-24 18:26:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3105. [2020-09-24 18:26:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3105 states. [2020-09-24 18:26:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 3897 transitions. [2020-09-24 18:26:48,192 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 3897 transitions. Word has length 163 [2020-09-24 18:26:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:48,193 INFO L479 AbstractCegarLoop]: Abstraction has 3105 states and 3897 transitions. [2020-09-24 18:26:48,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 3897 transitions. [2020-09-24 18:26:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 18:26:48,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:48,199 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, 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] [2020-09-24 18:26:48,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:26:48,199 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1378628793, now seen corresponding path program 1 times [2020-09-24 18:26:48,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:48,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802916930] [2020-09-24 18:26:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:48,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:48,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking...