/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=LOWLEXORDER --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/Problem01_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:02,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:02,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:02,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:02,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:02,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:02,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:02,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:02,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:02,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:02,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:02,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:02,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:02,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:02,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:02,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:02,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:02,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:02,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:02,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:02,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:02,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:02,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:02,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:02,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:02,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:02,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:02,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:02,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:02,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:02,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:02,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:02,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:02,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:02,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:02,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:02,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:02,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:02,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:02,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:02,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:02,578 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 21:40:02,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:02,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:02,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:02,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:02,622 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:02,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:02,622 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:02,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:02,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:02,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:02,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:02,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:02,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:02,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:02,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:02,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:02,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:02,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:02,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:02,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:02,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:02,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:02,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:02,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:02,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:02,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:02,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:02,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:02,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:02,628 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:03,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:03,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:03,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:03,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:03,100 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:03,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-24 21:40:03,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bdc027f0/a2a89ebdb52247a6910cb69e02670e2d/FLAG5fd6009a3 [2020-09-24 21:40:03,870 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:03,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-24 21:40:03,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bdc027f0/a2a89ebdb52247a6910cb69e02670e2d/FLAG5fd6009a3 [2020-09-24 21:40:04,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bdc027f0/a2a89ebdb52247a6910cb69e02670e2d [2020-09-24 21:40:04,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:04,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:04,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:04,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:04,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:04,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:04,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04, skipping insertion in model container [2020-09-24 21:40:04,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:04,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:04,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:04,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:04,683 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:04,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:04,942 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:04,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04 WrapperNode [2020-09-24 21:40:04,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:04,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:04,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:04,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:04,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:04,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:04,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:04,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:05,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:05,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:05,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (1/1) ... [2020-09-24 21:40:05,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:05,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:05,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:05,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:05,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (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 [2020-09-24 21:40:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:05,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:06,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:06,562 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:06,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:06 BoogieIcfgContainer [2020-09-24 21:40:06,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:06,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:06,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:06,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:06,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:04" (1/3) ... [2020-09-24 21:40:06,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad18132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:06, skipping insertion in model container [2020-09-24 21:40:06,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:04" (2/3) ... [2020-09-24 21:40:06,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad18132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:06, skipping insertion in model container [2020-09-24 21:40:06,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:06" (3/3) ... [2020-09-24 21:40:06,582 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label43.c [2020-09-24 21:40:06,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:06,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:06,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:06,664 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:06,664 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:06,664 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:06,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:06,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:06,665 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:06,665 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:06,665 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:40:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:06,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:06,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:06,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1333625535, now seen corresponding path program 1 times [2020-09-24 21:40:06,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:06,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002017105] [2020-09-24 21:40:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:07,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:07,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:09,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:10,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:12,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:12,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-24 21:40:12,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:12,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:40:12,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:12,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:12,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:12,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:12,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:12,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 21:40:12,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:13,465 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 21:40:13,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002017105] [2020-09-24 21:40:13,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:13,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 21:40:13,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207516311] [2020-09-24 21:40:13,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:40:13,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:13,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:40:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:40:13,503 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 19 states. [2020-09-24 21:40:13,919 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 21:40:14,115 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 21:40:14,347 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-24 21:40:14,593 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:40:14,814 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-09-24 21:40:15,258 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-09-24 21:40:16,212 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-24 21:40:16,683 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-09-24 21:40:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:20,128 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:40:20,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 156 [2020-09-24 21:40:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:20,175 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:20,176 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:20,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:40:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1149 transitions. [2020-09-24 21:40:20,313 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1149 transitions. Word has length 156 [2020-09-24 21:40:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:20,314 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1149 transitions. [2020-09-24 21:40:20,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:40:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1149 transitions. [2020-09-24 21:40:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 21:40:20,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:20,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:20,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:20,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:20,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1479520420, now seen corresponding path program 1 times [2020-09-24 21:40:20,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:20,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438482817] [2020-09-24 21:40:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:20,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:24,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-24 21:40:25,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:25,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:40:25,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 21:40:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:26,116 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-09-24 21:40:26,241 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-09-24 21:40:26,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:26,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:26,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:26,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:26,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:26,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 21:40:26,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:26,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:27,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:27,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:27,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 21:40:27,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:27,263 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-09-24 21:40:27,405 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-09-24 21:40:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:27,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438482817] [2020-09-24 21:40:27,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:27,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 21:40:27,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227124267] [2020-09-24 21:40:27,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 21:40:27,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 21:40:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:40:27,599 INFO L87 Difference]: Start difference. First operand 985 states and 1149 transitions. Second operand 26 states. [2020-09-24 21:40:28,569 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-24 21:40:28,893 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-09-24 21:40:29,079 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-09-24 21:40:29,410 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-09-24 21:40:29,852 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-09-24 21:40:30,154 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-09-24 21:40:30,979 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-09-24 21:40:31,276 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-09-24 21:40:31,608 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-09-24 21:40:32,107 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-09-24 21:40:32,447 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-24 21:40:33,025 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-09-24 21:40:33,552 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-09-24 21:40:34,411 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 83 [2020-09-24 21:40:35,104 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-09-24 21:40:35,381 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-09-24 21:40:35,765 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-09-24 21:40:36,077 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-24 21:40:36,437 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-09-24 21:40:36,815 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-09-24 21:40:37,111 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2020-09-24 21:40:37,441 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2020-09-24 21:40:38,686 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-09-24 21:40:39,178 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-09-24 21:40:39,620 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-24 21:40:39,881 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-09-24 21:40:40,123 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-09-24 21:40:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:41,550 INFO L93 Difference]: Finished difference Result 2262 states and 2646 transitions. [2020-09-24 21:40:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 21:40:41,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 173 [2020-09-24 21:40:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:41,560 INFO L225 Difference]: With dead ends: 2262 [2020-09-24 21:40:41,560 INFO L226 Difference]: Without dead ends: 1365 [2020-09-24 21:40:41,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1330, Invalid=3092, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 21:40:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2020-09-24 21:40:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1219. [2020-09-24 21:40:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1219 states. [2020-09-24 21:40:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1424 transitions. [2020-09-24 21:40:41,619 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1424 transitions. Word has length 173 [2020-09-24 21:40:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:41,620 INFO L479 AbstractCegarLoop]: Abstraction has 1219 states and 1424 transitions. [2020-09-24 21:40:41,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 21:40:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1424 transitions. [2020-09-24 21:40:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-24 21:40:41,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:41,626 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:41,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:41,626 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -531931122, now seen corresponding path program 1 times [2020-09-24 21:40:41,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:41,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453803394] [2020-09-24 21:40:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:46,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:46,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:46,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 21:40:46,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:40:46,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-09-24 21:40:46,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:46,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:40:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:40:46,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:47,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:47,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:47,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:47,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:40:47,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:47,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:47,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:47,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:47,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:47,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-24 21:40:47,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:47,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:47,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:47,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:47,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:40:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:47,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453803394] [2020-09-24 21:40:47,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:47,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:40:47,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607255042] [2020-09-24 21:40:47,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:40:47,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:40:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:40:47,642 INFO L87 Difference]: Start difference. First operand 1219 states and 1424 transitions. Second operand 13 states. [2020-09-24 21:40:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:53,376 INFO L93 Difference]: Finished difference Result 3264 states and 4010 transitions. [2020-09-24 21:40:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:40:53,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 177 [2020-09-24 21:40:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:53,394 INFO L225 Difference]: With dead ends: 3264 [2020-09-24 21:40:53,394 INFO L226 Difference]: Without dead ends: 1873 [2020-09-24 21:40:53,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:40:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-09-24 21:40:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1514. [2020-09-24 21:40:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-09-24 21:40:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1756 transitions. [2020-09-24 21:40:53,455 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1756 transitions. Word has length 177 [2020-09-24 21:40:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:53,455 INFO L479 AbstractCegarLoop]: Abstraction has 1514 states and 1756 transitions. [2020-09-24 21:40:53,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:40:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1756 transitions. [2020-09-24 21:40:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-24 21:40:53,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:53,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:53,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:53,463 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 753787392, now seen corresponding path program 1 times [2020-09-24 21:40:53,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:53,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78046489] [2020-09-24 21:40:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking...