/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=0.4 --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_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:31:02,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:31:02,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:31:02,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:31:02,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:31:02,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:31:02,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:31:02,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:31:02,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:31:02,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:31:02,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:31:02,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:31:02,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:31:02,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:31:02,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:31:02,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:31:02,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:31:02,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:31:02,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:31:02,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:31:02,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:31:02,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:31:02,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:31:02,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:31:02,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:31:02,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:31:02,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:31:02,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:31:02,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:31:02,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:31:02,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:31:02,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:31:02,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:31:02,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:31:02,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:31:02,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:31:02,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:31:02,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:31:02,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:31:02,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:31:02,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:31:02,536 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 13:31:02,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:31:02,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:31:02,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:31:02,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:31:02,581 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:31:02,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:31:02,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:31:02,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:31:02,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:31:02,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:31:02,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:31:02,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:31:02,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:31:02,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:31:02,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:31:02,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:31:02,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:31:02,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:31:02,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:31:02,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:31:02,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:31:02,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:31:02,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:31:02,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:31:02,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:31:02,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:31:02,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:31:02,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:31:02,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:31:02,588 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:31:03,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:31:03,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:31:03,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:31:03,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:31:03,055 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:31:03,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2020-09-25 13:31:03,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332290f51/43ca0e15da92447d8f4ec5d6c79f60bd/FLAG8b0821008 [2020-09-25 13:31:03,803 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:31:03,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label12.c [2020-09-25 13:31:03,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332290f51/43ca0e15da92447d8f4ec5d6c79f60bd/FLAG8b0821008 [2020-09-25 13:31:04,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/332290f51/43ca0e15da92447d8f4ec5d6c79f60bd [2020-09-25 13:31:04,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:31:04,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:31:04,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:31:04,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:31:04,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:31:04,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04, skipping insertion in model container [2020-09-25 13:31:04,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:31:04,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:31:04,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:31:04,623 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:31:04,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:31:04,881 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:31:04,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04 WrapperNode [2020-09-25 13:31:04,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:31:04,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:31:04,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:31:04,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:31:04,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:04,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:05,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:05,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... [2020-09-25 13:31:05,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:31:05,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:31:05,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:31:05,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:31:05,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:31:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:31:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:31:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 13:31:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:31:05,089 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 13:31:05,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:31:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:31:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:31:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:31:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:31:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:31:06,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:31:06,500 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:31:06,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:31:06 BoogieIcfgContainer [2020-09-25 13:31:06,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:31:06,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:31:06,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:31:06,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:31:06,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:31:04" (1/3) ... [2020-09-25 13:31:06,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:31:06, skipping insertion in model container [2020-09-25 13:31:06,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:04" (2/3) ... [2020-09-25 13:31:06,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:31:06, skipping insertion in model container [2020-09-25 13:31:06,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:31:06" (3/3) ... [2020-09-25 13:31:06,520 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label12.c [2020-09-25 13:31:06,532 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:31:06,543 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:31:06,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:31:06,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:31:06,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:31:06,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:31:06,602 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:31:06,602 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:31:06,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:31:06,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:31:06,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:31:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 13:31:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-25 13:31:06,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:06,660 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, 1, 1, 1, 1, 1] [2020-09-25 13:31:06,661 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash 463353353, now seen corresponding path program 1 times [2020-09-25 13:31:06,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:06,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-25 13:31:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:07,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:09,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:10,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:11,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:11,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-25 13:31:11,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:31:11,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 13:31:11,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:11,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:31:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 13:31:11,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 13:31:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:31:12,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:12,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:12,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:12,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:12,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 13:31:12,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:12,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:12,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:12,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:12,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 13:31:12,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:12,251 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 13:31:12,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-25 13:31:12,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:31:12,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:31:12,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839835109] [2020-09-25 13:31:12,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:31:12,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:31:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:31:12,290 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 13:31:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:14,608 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-25 13:31:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:31:14,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-09-25 13:31:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:14,664 INFO L225 Difference]: With dead ends: 1386 [2020-09-25 13:31:14,664 INFO L226 Difference]: Without dead ends: 787 [2020-09-25 13:31:14,677 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 13:31:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-25 13:31:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-25 13:31:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-25 13:31:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-25 13:31:14,806 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 144 [2020-09-25 13:31:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:14,807 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-25 13:31:14,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:31:14,808 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-25 13:31:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-25 13:31:14,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:14,818 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, 1, 1, 1, 1, 1] [2020-09-25 13:31:14,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:31:14,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1747040163, now seen corresponding path program 1 times [2020-09-25 13:31:14,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:14,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455648855] [2020-09-25 13:31:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:18,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:19,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:19,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-25 13:31:19,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 13:31:19,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 13:31:19,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:19,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 13:31:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 13:31:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:20,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:20,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:20,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:20,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 13:31:20,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:20,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:20,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:20,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:20,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:20,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:31:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:20,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:20,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 13:31:20,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 13:31:20,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:20,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:31:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:20,302 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 13:31:20,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455648855] [2020-09-25 13:31:20,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:20,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:31:20,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659498934] [2020-09-25 13:31:20,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:31:20,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:20,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:31:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:31:20,308 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 5 states. [2020-09-25 13:31:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:22,793 INFO L93 Difference]: Finished difference Result 1900 states and 2381 transitions. [2020-09-25 13:31:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:31:22,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-09-25 13:31:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:22,804 INFO L225 Difference]: With dead ends: 1900 [2020-09-25 13:31:22,805 INFO L226 Difference]: Without dead ends: 1189 [2020-09-25 13:31:22,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 13:31:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-09-25 13:31:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2020-09-25 13:31:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-09-25 13:31:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1308 transitions. [2020-09-25 13:31:22,864 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1308 transitions. Word has length 162 [2020-09-25 13:31:22,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:22,865 INFO L479 AbstractCegarLoop]: Abstraction has 1055 states and 1308 transitions. [2020-09-25 13:31:22,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:31:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1308 transitions. [2020-09-25 13:31:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-25 13:31:22,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:22,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:22,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:31:22,875 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1689264008, now seen corresponding path program 1 times [2020-09-25 13:31:22,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:22,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667477117] [2020-09-25 13:31:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:24,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:25,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:27,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:27,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:27,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-25 13:31:27,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 13:31:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 13:31:27,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:27,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:27,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-25 13:31:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-09-25 13:31:27,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:28,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:28,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:28,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:28,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:28,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 13:31:28,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:28,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:28,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:28,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:28,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:28,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:28,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 13:31:28,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:28,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 13:31:28,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:28,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:28,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:31:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:31:28,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667477117] [2020-09-25 13:31:28,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:28,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:31:28,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345809621] [2020-09-25 13:31:28,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:31:28,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:31:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:31:28,229 INFO L87 Difference]: Start difference. First operand 1055 states and 1308 transitions. Second operand 5 states. [2020-09-25 13:31:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:30,456 INFO L93 Difference]: Finished difference Result 2711 states and 3513 transitions. [2020-09-25 13:31:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:31:30,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-09-25 13:31:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:30,475 INFO L225 Difference]: With dead ends: 2711 [2020-09-25 13:31:30,475 INFO L226 Difference]: Without dead ends: 1678 [2020-09-25 13:31:30,479 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 13:31:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-09-25 13:31:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1507. [2020-09-25 13:31:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-09-25 13:31:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 1959 transitions. [2020-09-25 13:31:30,569 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 1959 transitions. Word has length 168 [2020-09-25 13:31:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:30,572 INFO L479 AbstractCegarLoop]: Abstraction has 1507 states and 1959 transitions. [2020-09-25 13:31:30,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:31:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 1959 transitions. [2020-09-25 13:31:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-25 13:31:30,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:30,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:30,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:31:30,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1919685948, now seen corresponding path program 1 times [2020-09-25 13:31:30,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:30,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889060053] [2020-09-25 13:31:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:35,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-25 13:31:35,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 13:31:35,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 13:31:35,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:35,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:35,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-25 13:31:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-25 13:31:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:35,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:35,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:35,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:35,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:31:35,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:35,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:35,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:35,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:35,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 13:31:35,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 13:31:35,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:35,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 13:31:35,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:31:35,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889060053] [2020-09-25 13:31:35,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:35,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:31:35,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519008867] [2020-09-25 13:31:35,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:31:35,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:31:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:31:35,869 INFO L87 Difference]: Start difference. First operand 1507 states and 1959 transitions. Second operand 5 states. [2020-09-25 13:31:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:37,855 INFO L93 Difference]: Finished difference Result 3793 states and 5175 transitions. [2020-09-25 13:31:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:31:37,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-09-25 13:31:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:37,873 INFO L225 Difference]: With dead ends: 3793 [2020-09-25 13:31:37,874 INFO L226 Difference]: Without dead ends: 2308 [2020-09-25 13:31:37,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:31:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2020-09-25 13:31:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2268. [2020-09-25 13:31:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2020-09-25 13:31:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2886 transitions. [2020-09-25 13:31:37,973 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2886 transitions. Word has length 178 [2020-09-25 13:31:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:37,974 INFO L479 AbstractCegarLoop]: Abstraction has 2268 states and 2886 transitions. [2020-09-25 13:31:37,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:31:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2886 transitions. [2020-09-25 13:31:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-25 13:31:37,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:37,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 13:31:37,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:31:37,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash -339284827, now seen corresponding path program 1 times [2020-09-25 13:31:37,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:37,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464897830] [2020-09-25 13:31:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:43,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-09-25 13:31:43,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 13:31:43,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 13:31:43,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:43,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:43,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 13:31:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 13:31:43,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:43,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:43,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:43,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:43,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 13:31:43,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:43,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:43,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:43,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:43,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 13:31:43,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:43,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 13:31:43,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:43,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:43,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 13:31:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:43,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 13:31:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:43,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:43,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 13:31:43,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-25 13:31:43,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:43,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 13:31:43,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-25 13:31:43,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 13:31:43,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464897830] [2020-09-25 13:31:43,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:43,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:31:43,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589555655] [2020-09-25 13:31:43,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:31:43,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:31:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:31:43,565 INFO L87 Difference]: Start difference. First operand 2268 states and 2886 transitions. Second operand 8 states. [2020-09-25 13:31:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:46,748 INFO L93 Difference]: Finished difference Result 6004 states and 8044 transitions. [2020-09-25 13:31:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 13:31:46,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 256 [2020-09-25 13:31:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:46,769 INFO L225 Difference]: With dead ends: 6004 [2020-09-25 13:31:46,769 INFO L226 Difference]: Without dead ends: 3758 [2020-09-25 13:31:46,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 13:31:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2020-09-25 13:31:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3368. [2020-09-25 13:31:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3368 states. [2020-09-25 13:31:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 4338 transitions. [2020-09-25 13:31:46,884 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 4338 transitions. Word has length 256 [2020-09-25 13:31:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:46,885 INFO L479 AbstractCegarLoop]: Abstraction has 3368 states and 4338 transitions. [2020-09-25 13:31:46,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:31:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 4338 transitions. [2020-09-25 13:31:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-25 13:31:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:46,903 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:31:46,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:31:46,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 362850936, now seen corresponding path program 1 times [2020-09-25 13:31:46,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:46,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041920762] [2020-09-25 13:31:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:49,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:51,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:51,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-09-25 13:31:51,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:31:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 13:31:51,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:31:52,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:31:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:52,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:52,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 13:31:52,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:31:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 13:31:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 13:31:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:31:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-25 13:31:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:52,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 13:31:52,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:52,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-25 13:31:52,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:52,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:52,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:31:52,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 13:31:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-25 13:31:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:31:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 13:31:52,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041920762] [2020-09-25 13:31:52,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:52,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 13:31:52,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733220517] [2020-09-25 13:31:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 13:31:52,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 13:31:52,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:31:52,437 INFO L87 Difference]: Start difference. First operand 3368 states and 4338 transitions. Second operand 7 states.