/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:36:50,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:36:50,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:36:50,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:36:50,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:36:50,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:36:50,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:36:50,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:36:50,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:36:50,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:36:50,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:36:50,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:36:50,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:36:50,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:36:50,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:36:50,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:36:50,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:36:50,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:36:50,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:36:50,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:36:50,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:36:50,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:36:50,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:36:50,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:36:50,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:36:50,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:36:50,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:36:50,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:36:50,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:36:50,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:36:50,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:36:50,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:36:50,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:36:50,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:36:50,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:36:50,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:36:50,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:36:50,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:36:50,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:36:50,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:36:50,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:36:50,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:36:50,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:36:50,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:36:50,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:36:50,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:36:50,534 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:36:50,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:36:50,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:36:50,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:36:50,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:36:50,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:36:50,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:36:50,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:36:50,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:36:50,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:36:50,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:36:50,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:36:50,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:36:50,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:36:50,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:36:50,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:36:50,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:36:50,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:36:50,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:36:50,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:36:50,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:36:50,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:36:50,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:36:50,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:36:50,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:36:50,541 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:36:51,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:36:51,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:36:51,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:36:51,070 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:36:51,071 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:36:51,072 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2020-09-24 20:36:51,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/607ba4de9/7889f63b46e049f3abf8aa864a4f2a36/FLAGaced5949d [2020-09-24 20:36:51,812 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:36:51,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2020-09-24 20:36:51,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/607ba4de9/7889f63b46e049f3abf8aa864a4f2a36/FLAGaced5949d [2020-09-24 20:36:52,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/607ba4de9/7889f63b46e049f3abf8aa864a4f2a36 [2020-09-24 20:36:52,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:36:52,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:36:52,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:36:52,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:36:52,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:36:52,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbac012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52, skipping insertion in model container [2020-09-24 20:36:52,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:36:52,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:36:52,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:36:52,726 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:36:52,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:36:52,872 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:36:52,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52 WrapperNode [2020-09-24 20:36:52,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:36:52,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:36:52,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:36:52,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:36:52,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:52,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... [2020-09-24 20:36:53,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:36:53,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:36:53,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:36:53,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:36:53,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:36:53,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:36:53,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:36:53,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 20:36:53,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:36:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 20:36:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:36:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:36:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 20:36:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:36:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:36:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:36:54,621 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:36:54,621 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:36:54,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:36:54 BoogieIcfgContainer [2020-09-24 20:36:54,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:36:54,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:36:54,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:36:54,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:36:54,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:36:52" (1/3) ... [2020-09-24 20:36:54,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60447c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:36:54, skipping insertion in model container [2020-09-24 20:36:54,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:36:52" (2/3) ... [2020-09-24 20:36:54,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60447c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:36:54, skipping insertion in model container [2020-09-24 20:36:54,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:36:54" (3/3) ... [2020-09-24 20:36:54,643 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label19.c [2020-09-24 20:36:54,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:36:54,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:36:54,693 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:36:54,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:36:54,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:36:54,738 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:36:54,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:36:54,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:36:54,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:36:54,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:36:54,739 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:36:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 20:36:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 20:36:54,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:36:54,782 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] [2020-09-24 20:36:54,783 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:36:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:36:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1688264769, now seen corresponding path program 1 times [2020-09-24 20:36:54,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:36:54,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982380634] [2020-09-24 20:36:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:36:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:36:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:55,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:36:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:36:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:36:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-09-24 20:36:55,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:36:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:36:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 20:36:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 20:36:55,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:36:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:36:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:36:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:36:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:36:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:36:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:36:55,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:36:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:36:55,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982380634] [2020-09-24 20:36:55,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:36:55,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 20:36:55,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583084218] [2020-09-24 20:36:55,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 20:36:55,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:36:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 20:36:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:36:55,667 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 20:36:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:36:57,690 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-24 20:36:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:36:57,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-09-24 20:36:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:36:57,735 INFO L225 Difference]: With dead ends: 1069 [2020-09-24 20:36:57,736 INFO L226 Difference]: Without dead ends: 555 [2020-09-24 20:36:57,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:36:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-24 20:36:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-24 20:36:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-24 20:36:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-24 20:36:57,843 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 48 [2020-09-24 20:36:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:36:57,844 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-24 20:36:57,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 20:36:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-24 20:36:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 20:36:57,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:36:57,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:36:57,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:36:57,853 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:36:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:36:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1595093336, now seen corresponding path program 1 times [2020-09-24 20:36:57,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:36:57,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601315518] [2020-09-24 20:36:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:36:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:36:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:59,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:36:59,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:36:59,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 20:36:59,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 20:36:59,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1993 [2020-09-24 20:36:59,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:36:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:36:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 20:36:59,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-24 20:36:59,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:36:59,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:37:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:00,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:00,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:00,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:37:00,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 20:37:00,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:37:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:37:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:00,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:37:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:00,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:00,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 20:37:00,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:37:00,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-24 20:37:00,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:37:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 20:37:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:37:00,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601315518] [2020-09-24 20:37:00,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:37:00,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:37:00,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157934323] [2020-09-24 20:37:00,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:37:00,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:37:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:37:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:37:00,536 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 8 states. [2020-09-24 20:37:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:37:03,780 INFO L93 Difference]: Finished difference Result 798 states and 1026 transitions. [2020-09-24 20:37:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:37:03,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2020-09-24 20:37:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:37:03,787 INFO L225 Difference]: With dead ends: 798 [2020-09-24 20:37:03,787 INFO L226 Difference]: Without dead ends: 796 [2020-09-24 20:37:03,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:37:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-09-24 20:37:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 697. [2020-09-24 20:37:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-09-24 20:37:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 905 transitions. [2020-09-24 20:37:03,836 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 905 transitions. Word has length 128 [2020-09-24 20:37:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:37:03,837 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 905 transitions. [2020-09-24 20:37:03,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:37:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 905 transitions. [2020-09-24 20:37:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 20:37:03,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:37:03,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:37:03,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:37:03,843 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:37:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:37:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1780229195, now seen corresponding path program 1 times [2020-09-24 20:37:03,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:37:03,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073252063] [2020-09-24 20:37:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:37:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:03,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:04,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:05,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 20:37:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:37:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-09-24 20:37:05,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:37:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:37:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 20:37:05,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:05,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:37:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:05,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:37:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:37:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:37:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:37:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:37:05,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:37:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:05,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:05,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:05,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 20:37:05,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:05,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-09-24 20:37:05,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:05,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:37:05,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:37:05,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 20:37:05,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:37:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:37:05,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073252063] [2020-09-24 20:37:05,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:37:05,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 20:37:05,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255699620] [2020-09-24 20:37:05,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:37:05,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:37:05,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:37:05,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:37:05,519 INFO L87 Difference]: Start difference. First operand 697 states and 905 transitions. Second operand 7 states. [2020-09-24 20:37:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:37:07,853 INFO L93 Difference]: Finished difference Result 1921 states and 2627 transitions. [2020-09-24 20:37:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:37:07,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-09-24 20:37:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:37:07,862 INFO L225 Difference]: With dead ends: 1921 [2020-09-24 20:37:07,862 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 20:37:07,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:37:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 20:37:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1173. [2020-09-24 20:37:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-09-24 20:37:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1460 transitions. [2020-09-24 20:37:07,955 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1460 transitions. Word has length 139 [2020-09-24 20:37:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:37:07,957 INFO L479 AbstractCegarLoop]: Abstraction has 1173 states and 1460 transitions. [2020-09-24 20:37:07,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:37:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1460 transitions. [2020-09-24 20:37:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 20:37:07,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:37:07,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:37:07,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:37:07,974 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:37:07,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:37:07,975 INFO L82 PathProgramCache]: Analyzing trace with hash -198517872, now seen corresponding path program 1 times [2020-09-24 20:37:07,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:37:07,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323383967] [2020-09-24 20:37:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:37:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:08,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:13,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:13,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 20:37:13,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:37:13,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 20:37:13,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:37:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:37:13,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-24 20:37:13,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:37:13,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:37:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:13,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:13,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:37:13,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 20:37:13,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:37:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:37:13,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:13,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:37:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:13,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:13,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 20:37:13,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:37:13,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-09-24 20:37:13,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:13,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:37:13,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:13,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 20:37:13,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:37:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:37:14,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323383967] [2020-09-24 20:37:14,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:37:14,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:37:14,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825607860] [2020-09-24 20:37:14,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:37:14,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:37:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:37:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:37:14,042 INFO L87 Difference]: Start difference. First operand 1173 states and 1460 transitions. Second operand 10 states. [2020-09-24 20:37:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:37:16,060 INFO L93 Difference]: Finished difference Result 2371 states and 2961 transitions. [2020-09-24 20:37:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:37:16,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-09-24 20:37:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:37:16,071 INFO L225 Difference]: With dead ends: 2371 [2020-09-24 20:37:16,071 INFO L226 Difference]: Without dead ends: 1175 [2020-09-24 20:37:16,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:37:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2020-09-24 20:37:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1163. [2020-09-24 20:37:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2020-09-24 20:37:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1442 transitions. [2020-09-24 20:37:16,136 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1442 transitions. Word has length 175 [2020-09-24 20:37:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:37:16,137 INFO L479 AbstractCegarLoop]: Abstraction has 1163 states and 1442 transitions. [2020-09-24 20:37:16,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:37:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1442 transitions. [2020-09-24 20:37:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-24 20:37:16,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:37:16,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:37:16,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:37:16,146 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:37:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:37:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1477023067, now seen corresponding path program 1 times [2020-09-24 20:37:16,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:37:16,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845309029] [2020-09-24 20:37:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:37:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:16,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:20,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:20,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-09-24 20:37:20,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:37:20,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4705 [2020-09-24 20:37:20,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:37:20,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:37:20,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-24 20:37:20,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:37:20,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:37:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:20,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:21,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:21,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:37:21,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:21,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 20:37:21,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:21,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:37:21,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:37:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:37:21,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:37:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:21,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:21,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 20:37:21,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:21,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 20:37:21,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:37:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:37:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 20:37:21,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:21,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 20:37:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:21,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:21,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 20:37:21,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-24 20:37:21,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:37:21,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:37:21,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 20:37:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:37:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-24 20:37:21,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845309029] [2020-09-24 20:37:21,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:37:21,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:37:21,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162287125] [2020-09-24 20:37:21,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:37:21,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:37:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:37:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:37:21,662 INFO L87 Difference]: Start difference. First operand 1163 states and 1442 transitions. Second operand 9 states. [2020-09-24 20:37:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:37:24,978 INFO L93 Difference]: Finished difference Result 3991 states and 5443 transitions. [2020-09-24 20:37:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:37:24,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 218 [2020-09-24 20:37:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:37:25,002 INFO L225 Difference]: With dead ends: 3991 [2020-09-24 20:37:25,003 INFO L226 Difference]: Without dead ends: 2843 [2020-09-24 20:37:25,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:37:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2020-09-24 20:37:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2620. [2020-09-24 20:37:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2620 states. [2020-09-24 20:37:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3289 transitions. [2020-09-24 20:37:25,122 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3289 transitions. Word has length 218 [2020-09-24 20:37:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:37:25,123 INFO L479 AbstractCegarLoop]: Abstraction has 2620 states and 3289 transitions. [2020-09-24 20:37:25,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:37:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3289 transitions. [2020-09-24 20:37:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 20:37:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:37:25,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:37:25,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:37:25,130 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:37:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:37:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 476320730, now seen corresponding path program 1 times [2020-09-24 20:37:25,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:37:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433778399] [2020-09-24 20:37:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:37:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:30,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:30,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-24 20:37:30,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:37:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 20:37:30,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:37:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:37:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 20:37:30,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:30,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:37:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:30,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:30,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:30,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:37:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 20:37:30,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:37:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:37:30,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:37:30,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 20:37:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:30,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:30,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 20:37:30,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 20:37:30,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:37:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:37:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-24 20:37:30,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 20:37:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:37:30,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 20:37:30,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:37:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 20:37:30,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:37:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:37:30,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-09-24 20:37:30,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:37:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:37:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 20:37:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433778399] [2020-09-24 20:37:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:37:30,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:37:30,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865741159] [2020-09-24 20:37:30,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:37:30,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:37:30,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:37:30,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:37:30,828 INFO L87 Difference]: Start difference. First operand 2620 states and 3289 transitions. Second operand 7 states. [2020-09-24 20:37:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:37:33,169 INFO L93 Difference]: Finished difference Result 5098 states and 6462 transitions. [2020-09-24 20:37:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:37:33,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 225 [2020-09-24 20:37:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:37:33,184 INFO L225 Difference]: With dead ends: 5098 [2020-09-24 20:37:33,184 INFO L226 Difference]: Without dead ends: 2643 [2020-09-24 20:37:33,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:37:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2020-09-24 20:37:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2628. [2020-09-24 20:37:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2020-09-24 20:37:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3315 transitions. [2020-09-24 20:37:33,271 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3315 transitions. Word has length 225 [2020-09-24 20:37:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:37:33,271 INFO L479 AbstractCegarLoop]: Abstraction has 2628 states and 3315 transitions. [2020-09-24 20:37:33,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:37:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3315 transitions. [2020-09-24 20:37:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-09-24 20:37:33,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:37:33,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:37:33,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:37:33,277 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:37:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:37:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash -838036601, now seen corresponding path program 1 times [2020-09-24 20:37:33,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:37:33,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32370891] [2020-09-24 20:37:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:37:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:37:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:33,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:37:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking...