/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/Problem10_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:25:34,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:25:34,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:25:34,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:25:34,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:25:34,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:25:34,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:25:34,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:25:34,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:25:34,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:25:34,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:25:34,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:25:34,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:25:34,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:25:34,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:25:34,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:25:34,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:25:34,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:25:34,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:25:34,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:25:34,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:25:34,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:25:34,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:25:34,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:25:34,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:25:34,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:25:34,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:25:34,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:25:34,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:25:34,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:25:34,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:25:34,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:25:34,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:25:34,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:25:34,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:25:34,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:25:34,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:25:34,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:25:34,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:25:34,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:25:34,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:25:34,907 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 18:25:34,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:25:34,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:25:34,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:25:34,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:25:34,935 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:25:34,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:25:34,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:25:34,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:25:34,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:25:34,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:25:34,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:25:34,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:25:34,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:25:34,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:25:34,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:25:34,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:25:34,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:25:34,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:25:34,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:25:34,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:25:34,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:25:34,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:25:34,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:25:34,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:25:34,940 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 18:25:35,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:25:35,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:25:35,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:25:35,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:25:35,406 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:25:35,408 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-09-24 18:25:35,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aa030a99/8012c2dcad8f46e8ad691e301c9106a2/FLAG114aa495f [2020-09-24 18:25:36,159 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:25:36,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-09-24 18:25:36,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aa030a99/8012c2dcad8f46e8ad691e301c9106a2/FLAG114aa495f [2020-09-24 18:25:36,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aa030a99/8012c2dcad8f46e8ad691e301c9106a2 [2020-09-24 18:25:36,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:25:36,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:25:36,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:36,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:25:36,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:25:36,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:36" (1/1) ... [2020-09-24 18:25:36,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d7e22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:36, skipping insertion in model container [2020-09-24 18:25:36,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:36" (1/1) ... [2020-09-24 18:25:36,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:25:36,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:25:37,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:37,048 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:25:37,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:37,312 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:25:37,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37 WrapperNode [2020-09-24 18:25:37,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:37,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:25:37,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:25:37,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:25:37,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (1/1) ... [2020-09-24 18:25:37,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:25:37,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:25:37,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:25:37,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:25:37,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (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 18:25:37,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:25:37,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:25:37,512 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:25:37,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:25:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:25:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:25:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:25:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:25:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:25:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:25:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:25:39,043 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:25:39,043 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:25:39,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:39 BoogieIcfgContainer [2020-09-24 18:25:39,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:25:39,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:25:39,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:25:39,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:25:39,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:25:36" (1/3) ... [2020-09-24 18:25:39,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5485bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:39, skipping insertion in model container [2020-09-24 18:25:39,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:37" (2/3) ... [2020-09-24 18:25:39,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5485bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:39, skipping insertion in model container [2020-09-24 18:25:39,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:39" (3/3) ... [2020-09-24 18:25:39,064 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label45.c [2020-09-24 18:25:39,077 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:25:39,089 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:25:39,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:25:39,154 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:25:39,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:25:39,154 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:25:39,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:25:39,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:25:39,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:25:39,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:25:39,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:25:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 18:25:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 18:25:39,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:39,202 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] [2020-09-24 18:25:39,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1037847345, now seen corresponding path program 1 times [2020-09-24 18:25:39,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:39,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088718078] [2020-09-24 18:25:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:40,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 18:25:40,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:25:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-09-24 18:25:40,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:25:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:25:40,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 18:25:40,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:25:40,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:40,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:40,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:40,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:40,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:40,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:25:40,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:40,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:40,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:25:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:40,623 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 18:25:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088718078] [2020-09-24 18:25:40,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:25:40,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:25:40,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854179228] [2020-09-24 18:25:40,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:40,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:40,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:40,658 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 5 states. [2020-09-24 18:25:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:43,082 INFO L93 Difference]: Finished difference Result 1226 states and 1797 transitions. [2020-09-24 18:25:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:25:43,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-09-24 18:25:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:43,109 INFO L225 Difference]: With dead ends: 1226 [2020-09-24 18:25:43,110 INFO L226 Difference]: Without dead ends: 707 [2020-09-24 18:25:43,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-09-24 18:25:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2020-09-24 18:25:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-09-24 18:25:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 926 transitions. [2020-09-24 18:25:43,246 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 926 transitions. Word has length 57 [2020-09-24 18:25:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:43,247 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 926 transitions. [2020-09-24 18:25:43,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:25:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 926 transitions. [2020-09-24 18:25:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 18:25:43,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:43,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:43,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:25:43,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1358485705, now seen corresponding path program 1 times [2020-09-24 18:25:43,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:43,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624406351] [2020-09-24 18:25:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:43,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:44,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:44,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:48,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-24 18:25:48,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:25:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 18:25:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:25:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:25:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 18:25:48,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:48,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:48,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:48,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:48,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:25:48,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:48,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:25:48,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:48,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:48,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:48,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:48,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 18:25:48,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:48,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-24 18:25:48,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:25:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 18:25:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 18:25:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:48,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624406351] [2020-09-24 18:25:48,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:25:48,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:25:48,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599336527] [2020-09-24 18:25:48,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:25:48,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:25:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:48,714 INFO L87 Difference]: Start difference. First operand 695 states and 926 transitions. Second operand 7 states. [2020-09-24 18:25:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:50,773 INFO L93 Difference]: Finished difference Result 1559 states and 2134 transitions. [2020-09-24 18:25:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:25:50,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-09-24 18:25:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:50,783 INFO L225 Difference]: With dead ends: 1559 [2020-09-24 18:25:50,784 INFO L226 Difference]: Without dead ends: 879 [2020-09-24 18:25:50,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 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 18:25:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-09-24 18:25:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 701. [2020-09-24 18:25:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-09-24 18:25:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 910 transitions. [2020-09-24 18:25:50,835 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 910 transitions. Word has length 140 [2020-09-24 18:25:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:50,836 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 910 transitions. [2020-09-24 18:25:50,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:25:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 910 transitions. [2020-09-24 18:25:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 18:25:50,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:50,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:50,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:25:50,842 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash -861467326, now seen corresponding path program 1 times [2020-09-24 18:25:50,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:50,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020810096] [2020-09-24 18:25:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:51,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:52,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:55,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:55,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-24 18:25:55,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:25:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4810 [2020-09-24 18:25:55,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:55,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:25:55,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-09-24 18:25:55,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 18:25:55,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:55,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:55,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:55,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:55,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:55,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:55,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:25:55,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:55,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:55,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:55,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:55,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:56,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:56,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:25:56,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 18:25:56,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:25:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 18:25:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:56,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020810096] [2020-09-24 18:25:56,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:56,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:25:56,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922277642] [2020-09-24 18:25:56,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:25:56,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:25:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:25:56,106 INFO L87 Difference]: Start difference. First operand 701 states and 910 transitions. Second operand 6 states. [2020-09-24 18:25:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:59,035 INFO L93 Difference]: Finished difference Result 2391 states and 3327 transitions. [2020-09-24 18:25:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:25:59,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-09-24 18:25:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:59,048 INFO L225 Difference]: With dead ends: 2391 [2020-09-24 18:25:59,049 INFO L226 Difference]: Without dead ends: 1705 [2020-09-24 18:25:59,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:25:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2020-09-24 18:25:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1489. [2020-09-24 18:25:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1489 states. [2020-09-24 18:25:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2038 transitions. [2020-09-24 18:25:59,122 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2038 transitions. Word has length 146 [2020-09-24 18:25:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:59,123 INFO L479 AbstractCegarLoop]: Abstraction has 1489 states and 2038 transitions. [2020-09-24 18:25:59,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:25:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2038 transitions. [2020-09-24 18:25:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 18:25:59,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:59,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:25:59,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:25:59,128 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 444399112, now seen corresponding path program 1 times [2020-09-24 18:25:59,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:59,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145842824] [2020-09-24 18:25:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:01,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:02,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:02,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-09-24 18:26:02,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:02,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3184 [2020-09-24 18:26:02,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:02,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:02,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 114 [2020-09-24 18:26:02,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 18:26:02,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:02,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:02,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:02,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:02,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:02,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:26:02,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:02,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:02,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:02,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 18:26:02,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:02,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 18:26:02,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:02,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:02,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:02,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-24 18:26:02,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:02,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145842824] [2020-09-24 18:26:02,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:02,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:02,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812694324] [2020-09-24 18:26:02,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:02,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:02,610 INFO L87 Difference]: Start difference. First operand 1489 states and 2038 transitions. Second operand 5 states. [2020-09-24 18:26:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:04,605 INFO L93 Difference]: Finished difference Result 4059 states and 5756 transitions. [2020-09-24 18:26:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:04,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-09-24 18:26:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:04,625 INFO L225 Difference]: With dead ends: 4059 [2020-09-24 18:26:04,626 INFO L226 Difference]: Without dead ends: 2585 [2020-09-24 18:26:04,633 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 18:26:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-09-24 18:26:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2105. [2020-09-24 18:26:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2020-09-24 18:26:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 2773 transitions. [2020-09-24 18:26:04,750 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 2773 transitions. Word has length 155 [2020-09-24 18:26:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:04,751 INFO L479 AbstractCegarLoop]: Abstraction has 2105 states and 2773 transitions. [2020-09-24 18:26:04,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 2773 transitions. [2020-09-24 18:26:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 18:26:04,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:04,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:04,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:26:04,756 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1882471934, now seen corresponding path program 1 times [2020-09-24 18:26:04,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:04,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102336496] [2020-09-24 18:26:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-09-24 18:26:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:26:09,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 18:26:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-09-24 18:26:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 18:26:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:09,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:09,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:09,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:09,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:09,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:09,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:09,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:10,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:10,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 18:26:10,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 18:26:10,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:10,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-24 18:26:10,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:10,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102336496] [2020-09-24 18:26:10,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:10,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:10,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460626] [2020-09-24 18:26:10,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:10,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:10,151 INFO L87 Difference]: Start difference. First operand 2105 states and 2773 transitions. Second operand 5 states. [2020-09-24 18:26:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:12,089 INFO L93 Difference]: Finished difference Result 5137 states and 7047 transitions. [2020-09-24 18:26:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:12,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-09-24 18:26:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:12,109 INFO L225 Difference]: With dead ends: 5137 [2020-09-24 18:26:12,109 INFO L226 Difference]: Without dead ends: 3047 [2020-09-24 18:26:12,120 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 18:26:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2020-09-24 18:26:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2567. [2020-09-24 18:26:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2567 states. [2020-09-24 18:26:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 3325 transitions. [2020-09-24 18:26:12,218 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 3325 transitions. Word has length 179 [2020-09-24 18:26:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:12,219 INFO L479 AbstractCegarLoop]: Abstraction has 2567 states and 3325 transitions. [2020-09-24 18:26:12,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 3325 transitions. [2020-09-24 18:26:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-24 18:26:12,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:12,226 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:12,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:26:12,227 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash -808700956, now seen corresponding path program 1 times [2020-09-24 18:26:12,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:12,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473255949] [2020-09-24 18:26:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:13,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-09-24 18:26:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 18:26:17,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:17,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:17,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:26:17,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:17,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:17,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:17,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:26:17,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:17,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-24 18:26:17,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:17,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 18:26:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 18:26:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:17,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 18:26:17,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-24 18:26:17,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:26:17,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 18:26:17,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:26:17,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473255949] [2020-09-24 18:26:17,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:17,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:26:17,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547006007] [2020-09-24 18:26:17,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:26:17,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:17,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:26:17,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:26:17,846 INFO L87 Difference]: Start difference. First operand 2567 states and 3325 transitions. Second operand 8 states. [2020-09-24 18:26:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:20,867 INFO L93 Difference]: Finished difference Result 5733 states and 7482 transitions. [2020-09-24 18:26:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 18:26:20,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 229 [2020-09-24 18:26:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:20,880 INFO L225 Difference]: With dead ends: 5733 [2020-09-24 18:26:20,880 INFO L226 Difference]: Without dead ends: 2355 [2020-09-24 18:26:20,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:26:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2020-09-24 18:26:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2195. [2020-09-24 18:26:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2195 states. [2020-09-24 18:26:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 2617 transitions. [2020-09-24 18:26:20,951 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 2617 transitions. Word has length 229 [2020-09-24 18:26:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:20,951 INFO L479 AbstractCegarLoop]: Abstraction has 2195 states and 2617 transitions. [2020-09-24 18:26:20,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:26:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 2617 transitions. [2020-09-24 18:26:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-09-24 18:26:20,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:20,959 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:20,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:26:20,959 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash -739258668, now seen corresponding path program 1 times [2020-09-24 18:26:20,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:20,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478710587] [2020-09-24 18:26:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:22,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:24,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:24,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:24,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking...