/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=0.5 --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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:38:20,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:38:20,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:38:20,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:38:20,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:38:20,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:38:20,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:38:20,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:38:20,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:38:20,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:38:20,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:38:20,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:38:20,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:38:20,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:38:20,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:38:20,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:38:20,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:38:20,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:38:20,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:38:20,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:38:20,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:38:20,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:38:20,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:38:20,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:38:20,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:38:20,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:38:20,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:38:20,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:38:20,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:38:20,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:38:20,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:38:20,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:38:20,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:38:20,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:38:20,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:38:20,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:38:20,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:38:20,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:38:20,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:38:20,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:38:20,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:38:20,519 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 14:38:20,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:38:20,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:38:20,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:38:20,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:38:20,546 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:38:20,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:38:20,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:38:20,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:38:20,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:38:20,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:38:20,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:38:20,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:38:20,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:38:20,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:38:20,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:38:20,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:38:20,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:38:20,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:38:20,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:38:20,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:38:20,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:38:20,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:38:20,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:38:20,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:38:20,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:38:20,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:38:20,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:38:20,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:38:20,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:38:20,552 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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-09-25 14:38:21,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:38:21,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:38:21,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:38:21,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:38:21,029 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:38:21,030 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-25 14:38:21,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ed34222/126f789e97da4d699c70487cebf28f14/FLAGb87bf5b8a [2020-09-25 14:38:21,757 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:38:21,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-25 14:38:21,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ed34222/126f789e97da4d699c70487cebf28f14/FLAGb87bf5b8a [2020-09-25 14:38:21,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ed34222/126f789e97da4d699c70487cebf28f14 [2020-09-25 14:38:22,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:38:22,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:38:22,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:38:22,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:38:22,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:38:22,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,034 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 02:38:22, skipping insertion in model container [2020-09-25 14:38:22,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:38:22,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:38:22,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:38:22,558 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:38:22,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:38:22,829 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:38:22,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22 WrapperNode [2020-09-25 14:38:22,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:38:22,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:38:22,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:38:22,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:38:22,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (1/1) ... [2020-09-25 14:38:22,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:38:22,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:38:22,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:38:22,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:38:22,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (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 14:38:23,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:38:23,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:38:23,017 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:38:23,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:38:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:38:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:38:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:38:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:38:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:38:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:38:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:38:24,326 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:38:24,327 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:38:24,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:38:24 BoogieIcfgContainer [2020-09-25 14:38:24,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:38:24,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:38:24,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:38:24,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:38:24,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:38:22" (1/3) ... [2020-09-25 14:38:24,342 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 02:38:24, skipping insertion in model container [2020-09-25 14:38:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:22" (2/3) ... [2020-09-25 14:38:24,342 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 02:38:24, skipping insertion in model container [2020-09-25 14:38:24,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:38:24" (3/3) ... [2020-09-25 14:38:24,345 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2020-09-25 14:38:24,357 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:38:24,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:38:24,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:38:24,423 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:38:24,423 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:38:24,423 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:38:24,423 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:38:24,424 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:38:24,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:38:24,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:38:24,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:38:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 14:38:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 14:38:24,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:24,479 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, 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 14:38:24,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1587967458, now seen corresponding path program 1 times [2020-09-25 14:38:24,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:24,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100677907] [2020-09-25 14:38:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:25,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:25,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:26,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:27,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:28,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:29,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:29,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:29,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 14:38:29,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:38:29,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 14:38:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:29,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:38:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 14:38:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 14:38:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 14:38:30,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:30,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:30,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:38:30,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:30,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 14:38:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:30,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:38:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:38:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:30,197 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 14:38:30,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100677907] [2020-09-25 14:38:30,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:38:30,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:38:30,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363829040] [2020-09-25 14:38:30,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:38:30,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:38:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:38:30,232 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 5 states. [2020-09-25 14:38:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:32,693 INFO L93 Difference]: Finished difference Result 1396 states and 1850 transitions. [2020-09-25 14:38:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:38:32,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-09-25 14:38:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:32,728 INFO L225 Difference]: With dead ends: 1396 [2020-09-25 14:38:32,729 INFO L226 Difference]: Without dead ends: 788 [2020-09-25 14:38:32,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:38:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-09-25 14:38:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2020-09-25 14:38:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-09-25 14:38:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 813 transitions. [2020-09-25 14:38:32,895 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 813 transitions. Word has length 139 [2020-09-25 14:38:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:32,901 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 813 transitions. [2020-09-25 14:38:32,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:38:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 813 transitions. [2020-09-25 14:38:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-25 14:38:32,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:32,910 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, 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 14:38:32,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:38:32,910 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash 366034702, now seen corresponding path program 1 times [2020-09-25 14:38:32,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:32,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170479240] [2020-09-25 14:38:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:33,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:33,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:33,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:33,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:33,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:34,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:35,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:37,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 14:38:37,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:38:37,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 14:38:37,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:37,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:38:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:38:37,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-25 14:38:37,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:38:38,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:38,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:38:38,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:38:38,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:38,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:38:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:38:38,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:38,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:38:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:38,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:38,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 14:38:38,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:38,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 14:38:38,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:38,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:38:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 14:38:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:38:38,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170479240] [2020-09-25 14:38:38,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:38:38,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:38:38,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557488965] [2020-09-25 14:38:38,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:38:38,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:38:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:38:38,243 INFO L87 Difference]: Start difference. First operand 665 states and 813 transitions. Second operand 5 states. [2020-09-25 14:38:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:40,319 INFO L93 Difference]: Finished difference Result 1662 states and 2128 transitions. [2020-09-25 14:38:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:38:40,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-09-25 14:38:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:40,326 INFO L225 Difference]: With dead ends: 1662 [2020-09-25 14:38:40,326 INFO L226 Difference]: Without dead ends: 1019 [2020-09-25 14:38:40,330 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 14:38:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-09-25 14:38:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 971. [2020-09-25 14:38:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-09-25 14:38:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1181 transitions. [2020-09-25 14:38:40,371 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1181 transitions. Word has length 157 [2020-09-25 14:38:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:40,372 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1181 transitions. [2020-09-25 14:38:40,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:38:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1181 transitions. [2020-09-25 14:38:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-25 14:38:40,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:40,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:38:40,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:38:40,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1549376371, now seen corresponding path program 1 times [2020-09-25 14:38:40,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:40,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565048636] [2020-09-25 14:38:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:40,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:41,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:42,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:44,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:45,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 14:38:45,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:38:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:38:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:45,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 14:38:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 14:38:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 14:38:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:46,271 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-09-25 14:38:46,452 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-09-25 14:38:46,635 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-09-25 14:38:46,807 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2020-09-25 14:38:46,958 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2020-09-25 14:38:47,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:47,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:38:47,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:47,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:38:47,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:47,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:38:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:38:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:38:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:47,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:47,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 14:38:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 14:38:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:47,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:38:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:47,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:38:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:38:47,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565048636] [2020-09-25 14:38:47,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:38:47,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 14:38:47,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577562528] [2020-09-25 14:38:47,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 14:38:47,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 14:38:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:38:47,266 INFO L87 Difference]: Start difference. First operand 971 states and 1181 transitions. Second operand 13 states. [2020-09-25 14:38:47,792 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-25 14:38:47,965 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-25 14:38:48,441 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-09-25 14:38:48,831 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-09-25 14:38:49,453 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-09-25 14:38:50,102 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 14:38:50,291 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-09-25 14:38:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:50,715 INFO L93 Difference]: Finished difference Result 2010 states and 2525 transitions. [2020-09-25 14:38:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 14:38:50,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 158 [2020-09-25 14:38:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:50,726 INFO L225 Difference]: With dead ends: 2010 [2020-09-25 14:38:50,726 INFO L226 Difference]: Without dead ends: 1061 [2020-09-25 14:38:50,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-25 14:38:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2020-09-25 14:38:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1030. [2020-09-25 14:38:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-09-25 14:38:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1248 transitions. [2020-09-25 14:38:50,793 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1248 transitions. Word has length 158 [2020-09-25 14:38:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:50,793 INFO L479 AbstractCegarLoop]: Abstraction has 1030 states and 1248 transitions. [2020-09-25 14:38:50,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 14:38:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1248 transitions. [2020-09-25 14:38:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 14:38:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:50,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:38:50,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:38:50,799 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1816238400, now seen corresponding path program 1 times [2020-09-25 14:38:50,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:50,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819569922] [2020-09-25 14:38:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:54,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:54,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:55,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:55,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 14:38:55,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:38:55,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 14:38:55,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:55,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:38:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-25 14:38:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 14:38:55,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:55,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:55,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:38:55,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:55,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:38:55,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:55,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:38:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:55,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:38:55,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:56,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:38:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:56,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 14:38:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:38:56,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:56,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:38:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:38:56,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:38:56,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819569922] [2020-09-25 14:38:56,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:38:56,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:38:56,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986996568] [2020-09-25 14:38:56,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:38:56,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:38:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:38:56,083 INFO L87 Difference]: Start difference. First operand 1030 states and 1248 transitions. Second operand 5 states. [2020-09-25 14:38:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:58,080 INFO L93 Difference]: Finished difference Result 2392 states and 3022 transitions. [2020-09-25 14:38:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:38:58,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-09-25 14:38:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:58,091 INFO L225 Difference]: With dead ends: 2392 [2020-09-25 14:38:58,091 INFO L226 Difference]: Without dead ends: 1384 [2020-09-25 14:38:58,095 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 14:38:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-09-25 14:38:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1335. [2020-09-25 14:38:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2020-09-25 14:38:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1591 transitions. [2020-09-25 14:38:58,143 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1591 transitions. Word has length 161 [2020-09-25 14:38:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:58,144 INFO L479 AbstractCegarLoop]: Abstraction has 1335 states and 1591 transitions. [2020-09-25 14:38:58,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:38:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1591 transitions. [2020-09-25 14:38:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-25 14:38:58,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:58,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:38:58,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:38:58,150 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1548871723, now seen corresponding path program 1 times [2020-09-25 14:38:58,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:58,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273475310] [2020-09-25 14:38:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:02,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 14:39:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 14:39:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 14:39:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:03,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:03,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:03,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:39:03,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 14:39:03,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:03,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:03,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:39:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 14:39:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:03,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273475310] [2020-09-25 14:39:03,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:03,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 14:39:03,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565801710] [2020-09-25 14:39:03,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:39:03,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:39:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:39:03,867 INFO L87 Difference]: Start difference. First operand 1335 states and 1591 transitions. Second operand 11 states. [2020-09-25 14:39:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:08,631 INFO L93 Difference]: Finished difference Result 6924 states and 9607 transitions. [2020-09-25 14:39:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 14:39:08,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-09-25 14:39:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:08,674 INFO L225 Difference]: With dead ends: 6924 [2020-09-25 14:39:08,675 INFO L226 Difference]: Without dead ends: 5611 [2020-09-25 14:39:08,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-09-25 14:39:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2020-09-25 14:39:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5302. [2020-09-25 14:39:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5302 states. [2020-09-25 14:39:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 6566 transitions. [2020-09-25 14:39:08,877 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 6566 transitions. Word has length 168 [2020-09-25 14:39:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:08,877 INFO L479 AbstractCegarLoop]: Abstraction has 5302 states and 6566 transitions. [2020-09-25 14:39:08,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:39:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 6566 transitions. [2020-09-25 14:39:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-25 14:39:08,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:08,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:08,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:39:08,904 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash -654134720, now seen corresponding path program 1 times [2020-09-25 14:39:08,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:08,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418650997] [2020-09-25 14:39:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:09,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking...