/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/Problem02_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:22:42,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:22:42,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:22:42,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:22:42,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:22:42,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:22:42,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:22:42,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:22:42,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:22:42,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:22:42,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:22:42,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:22:42,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:22:42,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:22:42,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:22:42,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:22:42,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:22:42,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:22:42,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:22:42,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:22:42,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:22:42,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:22:42,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:22:42,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:22:42,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:22:42,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:22:42,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:22:42,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:22:42,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:22:42,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:22:42,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:22:42,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:22:42,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:22:42,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:22:42,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:22:42,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:22:42,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:22:42,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:22:42,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:22:42,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:22:42,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:22:42,345 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 18:22:42,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:22:42,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:22:42,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:22:42,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:22:42,418 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:22:42,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:22:42,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:22:42,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:22:42,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:22:42,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:22:42,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:22:42,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:22:42,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:22:42,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:22:42,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:22:42,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:22:42,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:22:42,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:22:42,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:22:42,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:22:42,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:22:42,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:22:42,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:22:42,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:22:42,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:22:42,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:22:42,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:22:42,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:22:42,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:22:42,427 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 18:22:42,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:22:42,968 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:22:42,972 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:22:42,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:22:42,975 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:22:42,976 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2020-09-24 18:22:43,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01878b11e/4f2bd104032e4d099bb3e6d697e691e3/FLAG11383f24a [2020-09-24 18:22:43,663 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:22:43,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2020-09-24 18:22:43,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01878b11e/4f2bd104032e4d099bb3e6d697e691e3/FLAG11383f24a [2020-09-24 18:22:43,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01878b11e/4f2bd104032e4d099bb3e6d697e691e3 [2020-09-24 18:22:43,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:22:43,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:22:43,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:22:43,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:22:43,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:22:43,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:22:43" (1/1) ... [2020-09-24 18:22:43,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:43, skipping insertion in model container [2020-09-24 18:22:43,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:22:43" (1/1) ... [2020-09-24 18:22:43,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:22:44,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:22:44,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:22:44,541 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:22:44,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:22:44,764 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:22:44,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44 WrapperNode [2020-09-24 18:22:44,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:22:44,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:22:44,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:22:44,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:22:44,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... [2020-09-24 18:22:44,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:22:44,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:22:44,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:22:44,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:22:44,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:22:44,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:22:44,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:22:44,975 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:22:44,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:22:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:22:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:22:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:22:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:22:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:22:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:22:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:22:46,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:22:46,292 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:22:46,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:22:46 BoogieIcfgContainer [2020-09-24 18:22:46,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:22:46,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:22:46,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:22:46,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:22:46,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:22:43" (1/3) ... [2020-09-24 18:22:46,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:22:46, skipping insertion in model container [2020-09-24 18:22:46,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:22:44" (2/3) ... [2020-09-24 18:22:46,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:22:46, skipping insertion in model container [2020-09-24 18:22:46,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:22:46" (3/3) ... [2020-09-24 18:22:46,312 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2020-09-24 18:22:46,324 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:22:46,336 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:22:46,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:22:46,398 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:22:46,398 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:22:46,398 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:22:46,399 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:22:46,399 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:22:46,399 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:22:46,399 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:22:46,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:22:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 18:22:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 18:22:46,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:22:46,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:46,468 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:22:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:22:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 632775426, now seen corresponding path program 1 times [2020-09-24 18:22:46,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:22:46,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106040551] [2020-09-24 18:22:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:22:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:22:46,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:47,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:22:51,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 18:22:51,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:22:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 18:22:51,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:22:51,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:22:51,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:22:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-09-24 18:22:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:22:51,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:22:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:22:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:51,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:22:51,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:22:51,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:22:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 18:22:51,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:22:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:22:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:22:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:22:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:22:51,985 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 18:22:51,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106040551] [2020-09-24 18:22:51,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:22:51,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:22:51,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636742549] [2020-09-24 18:22:51,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:22:51,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:22:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:22:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:22:52,019 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-24 18:22:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:22:54,445 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-24 18:22:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:22:54,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-09-24 18:22:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:22:54,487 INFO L225 Difference]: With dead ends: 1386 [2020-09-24 18:22:54,487 INFO L226 Difference]: Without dead ends: 787 [2020-09-24 18:22:54,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:22:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-24 18:22:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-24 18:22:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-24 18:22:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-24 18:22:54,674 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 115 [2020-09-24 18:22:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:22:54,676 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-24 18:22:54,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:22:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-24 18:22:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 18:22:54,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:22:54,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:22:54,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:22:54,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:22:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:22:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1507069906, now seen corresponding path program 1 times [2020-09-24 18:22:54,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:22:54,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349905139] [2020-09-24 18:22:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:22:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:22:54,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:54,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:55,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:59,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:22:59,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 18:22:59,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:22:59,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 18:22:59,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:22:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:22:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-24 18:22:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-24 18:22:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:22:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:22:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:22:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:59,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:22:59,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:22:59,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:22:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:22:59,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:22:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:22:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:22:59,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:22:59,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:22:59,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 18:22:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:22:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:22:59,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:22:59,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 18:22:59,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:22:59,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:22:59,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:22:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:22:59,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:22:59,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:22:59,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:22:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:22:59,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349905139] [2020-09-24 18:22:59,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:22:59,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:22:59,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689994824] [2020-09-24 18:22:59,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:22:59,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:22:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:22:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:22:59,985 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 5 states. [2020-09-24 18:23:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:23:02,440 INFO L93 Difference]: Finished difference Result 1900 states and 2381 transitions. [2020-09-24 18:23:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:23:02,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-09-24 18:23:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:23:02,453 INFO L225 Difference]: With dead ends: 1900 [2020-09-24 18:23:02,453 INFO L226 Difference]: Without dead ends: 1189 [2020-09-24 18:23:02,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:23:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-09-24 18:23:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2020-09-24 18:23:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-09-24 18:23:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1308 transitions. [2020-09-24 18:23:02,492 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1308 transitions. Word has length 133 [2020-09-24 18:23:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:23:02,493 INFO L479 AbstractCegarLoop]: Abstraction has 1055 states and 1308 transitions. [2020-09-24 18:23:02,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:23:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1308 transitions. [2020-09-24 18:23:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 18:23:02,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:23:02,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:23:02,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:23:02,499 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:23:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:23:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2051843805, now seen corresponding path program 1 times [2020-09-24 18:23:02,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:23:02,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121515518] [2020-09-24 18:23:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:23:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:03,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:06,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:06,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 18:23:06,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:23:06,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4369 [2020-09-24 18:23:06,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:23:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-24 18:23:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 18:23:06,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:23:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:07,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:07,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:07,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:23:07,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:07,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:23:07,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:23:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:23:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:23:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 18:23:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:07,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:07,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:07,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:23:07,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:07,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 18:23:07,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:23:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:23:07,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:23:07,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121515518] [2020-09-24 18:23:07,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:23:07,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:23:07,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473186689] [2020-09-24 18:23:07,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:23:07,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:23:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:23:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:23:07,167 INFO L87 Difference]: Start difference. First operand 1055 states and 1308 transitions. Second operand 5 states. [2020-09-24 18:23:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:23:09,346 INFO L93 Difference]: Finished difference Result 2737 states and 3595 transitions. [2020-09-24 18:23:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:23:09,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-09-24 18:23:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:23:09,369 INFO L225 Difference]: With dead ends: 2737 [2020-09-24 18:23:09,369 INFO L226 Difference]: Without dead ends: 1704 [2020-09-24 18:23:09,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:23:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2020-09-24 18:23:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1664. [2020-09-24 18:23:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2020-09-24 18:23:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2048 transitions. [2020-09-24 18:23:09,459 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2048 transitions. Word has length 139 [2020-09-24 18:23:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:23:09,461 INFO L479 AbstractCegarLoop]: Abstraction has 1664 states and 2048 transitions. [2020-09-24 18:23:09,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:23:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2048 transitions. [2020-09-24 18:23:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 18:23:09,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:23:09,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:23:09,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:23:09,479 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:23:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:23:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash 79526696, now seen corresponding path program 1 times [2020-09-24 18:23:09,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:23:09,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239891034] [2020-09-24 18:23:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:23:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:09,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:14,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-09-24 18:23:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:23:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 18:23:14,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:14,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:23:14,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:23:14,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 18:23:14,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:23:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:14,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:14,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:23:14,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 18:23:14,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:23:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:23:14,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:14,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 18:23:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:14,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:14,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 18:23:14,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:23:14,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:23:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 18:23:14,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:23:14,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 18:23:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:14,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:14,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-24 18:23:14,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:14,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 18:23:14,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:14,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:23:14,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:23:14,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:23:14,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:23:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:23:14,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239891034] [2020-09-24 18:23:14,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:23:14,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:23:14,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607581116] [2020-09-24 18:23:14,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:23:14,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:23:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:23:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:23:14,823 INFO L87 Difference]: Start difference. First operand 1664 states and 2048 transitions. Second operand 7 states. [2020-09-24 18:23:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:23:18,431 INFO L93 Difference]: Finished difference Result 5317 states and 7520 transitions. [2020-09-24 18:23:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:23:18,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-09-24 18:23:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:23:18,472 INFO L225 Difference]: With dead ends: 5317 [2020-09-24 18:23:18,472 INFO L226 Difference]: Without dead ends: 3675 [2020-09-24 18:23:18,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:23:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-09-24 18:23:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3288. [2020-09-24 18:23:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3288 states. [2020-09-24 18:23:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4012 transitions. [2020-09-24 18:23:18,660 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4012 transitions. Word has length 153 [2020-09-24 18:23:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:23:18,661 INFO L479 AbstractCegarLoop]: Abstraction has 3288 states and 4012 transitions. [2020-09-24 18:23:18,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:23:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4012 transitions. [2020-09-24 18:23:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 18:23:18,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:23:18,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:23:18,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:23:18,678 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:23:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:23:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash -240738087, now seen corresponding path program 1 times [2020-09-24 18:23:18,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:23:18,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776113600] [2020-09-24 18:23:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:23:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:18,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:19,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 18:23:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:23:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 18:23:23,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:23:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-24 18:23:23,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 18:23:23,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:23,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:23:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:23,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:23,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:23:23,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:23,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:23:23,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:23:23,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:23,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:23:23,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 18:23:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:23,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:23,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:23,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 18:23:23,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:23,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:23:23,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:23,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:23:23,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:23:23,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 18:23:23,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:23:23,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 18:23:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:23,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:23:23,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:23:23,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:23:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 18:23:23,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:23:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:23:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:23:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:23:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:23:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:23:23,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776113600] [2020-09-24 18:23:23,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:23:23,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:23:23,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122055526] [2020-09-24 18:23:23,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:23:23,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:23:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:23:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:23:23,959 INFO L87 Difference]: Start difference. First operand 3288 states and 4012 transitions. Second operand 7 states. [2020-09-24 18:23:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:23:26,791 INFO L93 Difference]: Finished difference Result 6153 states and 7628 transitions. [2020-09-24 18:23:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:23:26,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 158 [2020-09-24 18:23:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:23:26,808 INFO L225 Difference]: With dead ends: 6153 [2020-09-24 18:23:26,808 INFO L226 Difference]: Without dead ends: 2996 [2020-09-24 18:23:26,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:23:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-09-24 18:23:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2772. [2020-09-24 18:23:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2772 states. [2020-09-24 18:23:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3244 transitions. [2020-09-24 18:23:26,912 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3244 transitions. Word has length 158 [2020-09-24 18:23:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:23:26,912 INFO L479 AbstractCegarLoop]: Abstraction has 2772 states and 3244 transitions. [2020-09-24 18:23:26,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:23:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3244 transitions. [2020-09-24 18:23:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-24 18:23:26,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:23:26,924 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, 2, 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 18:23:26,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:23:26,924 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:23:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:23:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1325761521, now seen corresponding path program 1 times [2020-09-24 18:23:26,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:23:26,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605029685] [2020-09-24 18:23:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:23:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:23:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:27,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:23:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking...