/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:17:21,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:17:21,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:17:21,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:17:21,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:17:21,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:17:21,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:17:21,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:17:21,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:17:21,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:17:21,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:17:21,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:17:21,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:17:21,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:17:21,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:17:21,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:17:21,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:17:21,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:17:21,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:17:21,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:17:21,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:17:21,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:17:21,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:17:21,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:17:21,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:17:21,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:17:21,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:17:21,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:17:21,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:17:21,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:17:21,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:17:21,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:17:21,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:17:21,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:17:21,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:17:21,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:17:21,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:17:21,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:17:21,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:17:21,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:17:21,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:17:21,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:17:21,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:17:21,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:17:21,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:17:21,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:17:21,511 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:17:21,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:17:21,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:17:21,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:17:21,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:17:21,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:17:21,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:17:21,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:17:21,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:17:21,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:17:21,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:17:21,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:17:21,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:17:21,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:17:21,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:17:21,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:17:21,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:17:21,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:17:21,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:17:21,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:17:21,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:17:21,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:17:21,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:17:21,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:17:21,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:17:21,520 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:17:21,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:17:21,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:17:21,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:17:21,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:17:21,975 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:17:21,977 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2020-09-25 11:17:22,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2acc6453d/5a79fd444e93420fad2385446070b4b3/FLAGb40b2c445 [2020-09-25 11:17:22,708 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:17:22,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label44.c [2020-09-25 11:17:22,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2acc6453d/5a79fd444e93420fad2385446070b4b3/FLAGb40b2c445 [2020-09-25 11:17:22,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2acc6453d/5a79fd444e93420fad2385446070b4b3 [2020-09-25 11:17:22,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:17:22,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:17:22,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:17:22,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:17:22,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:17:22,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:17:22" (1/1) ... [2020-09-25 11:17:22,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:22, skipping insertion in model container [2020-09-25 11:17:22,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:17:22" (1/1) ... [2020-09-25 11:17:22,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:17:23,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:17:23,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:17:23,450 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:17:23,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:17:23,705 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:17:23,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23 WrapperNode [2020-09-25 11:17:23,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:17:23,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:17:23,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:17:23,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:17:23,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... [2020-09-25 11:17:23,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:17:23,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:17:23,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:17:23,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:17:23,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:17:23,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:17:23,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:17:23,933 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:17:23,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:17:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:17:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:17:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:17:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:17:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:17:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:17:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:17:25,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:17:25,243 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:17:25,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:17:25 BoogieIcfgContainer [2020-09-25 11:17:25,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:17:25,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:17:25,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:17:25,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:17:25,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:17:22" (1/3) ... [2020-09-25 11:17:25,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:17:25, skipping insertion in model container [2020-09-25 11:17:25,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:17:23" (2/3) ... [2020-09-25 11:17:25,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:17:25, skipping insertion in model container [2020-09-25 11:17:25,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:17:25" (3/3) ... [2020-09-25 11:17:25,262 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label44.c [2020-09-25 11:17:25,275 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:17:25,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:17:25,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:17:25,346 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:17:25,346 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:17:25,347 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:17:25,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:17:25,347 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:17:25,347 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:17:25,347 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:17:25,347 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:17:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:17:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-25 11:17:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:25,399 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] [2020-09-25 11:17:25,400 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash -118135375, now seen corresponding path program 1 times [2020-09-25 11:17:25,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:25,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100677907] [2020-09-25 11:17:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:26,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:26,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:28,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:30,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:30,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 11:17:30,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:17:30,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:17:30,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:30,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:17:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:17:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-25 11:17:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 11:17:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:30,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:30,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:30,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:30,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 11:17:30,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:30,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:17:30,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:31,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100677907] [2020-09-25 11:17:31,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:17:31,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:17:31,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613307259] [2020-09-25 11:17:31,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:17:31,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:17:31,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:17:31,061 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:17:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:33,187 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 11:17:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:17:33,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-09-25 11:17:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:33,212 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 11:17:33,212 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 11:17:33,228 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 [2020-09-25 11:17:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 11:17:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 11:17:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 11:17:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 11:17:33,336 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 114 [2020-09-25 11:17:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:33,337 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 11:17:33,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:17:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 11:17:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 11:17:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:33,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:17:33,357 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 144430378, now seen corresponding path program 1 times [2020-09-25 11:17:33,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355213424] [2020-09-25 11:17:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:33,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:33,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:33,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:34,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:38,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:38,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-25 11:17:38,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:17:38,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 11:17:38,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:38,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:38,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:38,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:17:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 11:17:38,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:38,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:38,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:38,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:38,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:38,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:17:38,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:38,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:38,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:38,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:38,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:38,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:38,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:17:38,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:38,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:17:38,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:38,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:38,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:17:38,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:38,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355213424] [2020-09-25 11:17:38,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:38,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:17:38,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415498702] [2020-09-25 11:17:38,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:17:38,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:17:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:17:38,643 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 11:17:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:40,578 INFO L93 Difference]: Finished difference Result 1531 states and 1847 transitions. [2020-09-25 11:17:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:17:40,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-09-25 11:17:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:40,586 INFO L225 Difference]: With dead ends: 1531 [2020-09-25 11:17:40,586 INFO L226 Difference]: Without dead ends: 932 [2020-09-25 11:17:40,589 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 [2020-09-25 11:17:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2020-09-25 11:17:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 922. [2020-09-25 11:17:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 922 states. [2020-09-25 11:17:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1103 transitions. [2020-09-25 11:17:40,630 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1103 transitions. Word has length 131 [2020-09-25 11:17:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:40,631 INFO L479 AbstractCegarLoop]: Abstraction has 922 states and 1103 transitions. [2020-09-25 11:17:40,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:17:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1103 transitions. [2020-09-25 11:17:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 11:17:40,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:40,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:17:40,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:17:40,636 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash -294296002, now seen corresponding path program 1 times [2020-09-25 11:17:40,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:40,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460042242] [2020-09-25 11:17:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:40,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:41,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:41,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:45,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:45,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-25 11:17:45,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:17:45,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-25 11:17:45,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:45,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:17:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:17:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-09-25 11:17:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:17:45,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:45,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:45,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:45,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:45,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:17:45,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:45,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:45,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:45,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:45,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:17:45,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:45,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:17:45,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:45,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:17:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:45,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:17:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:45,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:45,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:45,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:45,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:17:45,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 11:17:45,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:17:46,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460042242] [2020-09-25 11:17:46,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:46,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:17:46,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793725118] [2020-09-25 11:17:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:17:46,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:17:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:17:46,374 INFO L87 Difference]: Start difference. First operand 922 states and 1103 transitions. Second operand 10 states. [2020-09-25 11:17:47,667 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-09-25 11:17:50,108 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-25 11:17:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:52,316 INFO L93 Difference]: Finished difference Result 3051 states and 4085 transitions. [2020-09-25 11:17:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 11:17:52,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-09-25 11:17:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:52,336 INFO L225 Difference]: With dead ends: 3051 [2020-09-25 11:17:52,336 INFO L226 Difference]: Without dead ends: 1996 [2020-09-25 11:17:52,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:17:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2020-09-25 11:17:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1969. [2020-09-25 11:17:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-09-25 11:17:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2377 transitions. [2020-09-25 11:17:52,443 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2377 transitions. Word has length 149 [2020-09-25 11:17:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:52,444 INFO L479 AbstractCegarLoop]: Abstraction has 1969 states and 2377 transitions. [2020-09-25 11:17:52,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:17:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2377 transitions. [2020-09-25 11:17:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 11:17:52,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:52,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:52,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:17:52,455 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash 975428034, now seen corresponding path program 1 times [2020-09-25 11:17:52,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:52,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109511411] [2020-09-25 11:17:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:55,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:57,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-25 11:17:57,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:17:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:17:57,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:57,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:17:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:17:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 11:17:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:57,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:57,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:57,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:57,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 11:17:57,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:57,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:17:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:57,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:17:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:57,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:57,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:57,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:57,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 11:17:57,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:57,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-09-25 11:17:57,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:57,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:17:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:57,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:17:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:58,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109511411] [2020-09-25 11:17:58,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:58,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:17:58,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915356613] [2020-09-25 11:17:58,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:17:58,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:17:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:17:58,255 INFO L87 Difference]: Start difference. First operand 1969 states and 2377 transitions. Second operand 10 states. [2020-09-25 11:18:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:01,854 INFO L93 Difference]: Finished difference Result 4635 states and 5885 transitions. [2020-09-25 11:18:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:18:01,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 156 [2020-09-25 11:18:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:01,871 INFO L225 Difference]: With dead ends: 4635 [2020-09-25 11:18:01,871 INFO L226 Difference]: Without dead ends: 2402 [2020-09-25 11:18:01,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:18:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-09-25 11:18:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 2076. [2020-09-25 11:18:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-09-25 11:18:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2518 transitions. [2020-09-25 11:18:01,955 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2518 transitions. Word has length 156 [2020-09-25 11:18:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:01,956 INFO L479 AbstractCegarLoop]: Abstraction has 2076 states and 2518 transitions. [2020-09-25 11:18:01,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:18:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2518 transitions. [2020-09-25 11:18:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-25 11:18:01,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:01,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 11:18:01,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:18:01,965 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -203253166, now seen corresponding path program 1 times [2020-09-25 11:18:01,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:01,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701823669] [2020-09-25 11:18:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:02,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:03,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:07,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-25 11:18:07,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:18:07,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 11:18:07,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:07,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:18:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-09-25 11:18:07,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-25 11:18:07,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:07,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:07,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:07,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:07,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:18:07,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:07,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 11:18:07,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:18:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:07,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:07,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:18:07,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:07,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:07,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:07,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:07,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 11:18:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:07,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:07,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:18:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:18:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:07,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:18:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:18:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 11:18:07,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701823669] [2020-09-25 11:18:07,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:18:07,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:18:07,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739546261] [2020-09-25 11:18:07,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:18:07,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:18:07,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:18:07,222 INFO L87 Difference]: Start difference. First operand 2076 states and 2518 transitions. Second operand 5 states. [2020-09-25 11:18:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:09,220 INFO L93 Difference]: Finished difference Result 5298 states and 6691 transitions. [2020-09-25 11:18:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:18:09,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-09-25 11:18:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:09,236 INFO L225 Difference]: With dead ends: 5298 [2020-09-25 11:18:09,236 INFO L226 Difference]: Without dead ends: 2917 [2020-09-25 11:18:09,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:18:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2020-09-25 11:18:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2700. [2020-09-25 11:18:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2700 states. [2020-09-25 11:18:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3347 transitions. [2020-09-25 11:18:09,323 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3347 transitions. Word has length 164 [2020-09-25 11:18:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:09,323 INFO L479 AbstractCegarLoop]: Abstraction has 2700 states and 3347 transitions. [2020-09-25 11:18:09,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:18:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3347 transitions. [2020-09-25 11:18:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-25 11:18:09,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:09,333 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:18:09,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:18:09,334 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash -683879195, now seen corresponding path program 1 times [2020-09-25 11:18:09,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:09,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368359685] [2020-09-25 11:18:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:09,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking...