/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/Problem02_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:57,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:57,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:57,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:57,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:57,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:57,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:57,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:57,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:57,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:57,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:57,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:57,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:57,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:57,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:57,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:57,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:57,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:57,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:57,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:57,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:57,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:57,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:57,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:57,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:57,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:57,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:57,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:57,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:57,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:57,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:57,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:57,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:57,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:57,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:57,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:57,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:57,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:57,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:57,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:57,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:57,814 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 21:42:57,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:57,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:57,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:57,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:57,861 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:57,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:57,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:57,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:57,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:57,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:57,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:57,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:57,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:57,863 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:57,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:57,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:57,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:57,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:57,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:57,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:57,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:57,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:57,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:57,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:57,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:57,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:57,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:57,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:57,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:57,867 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 21:42:58,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:58,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:58,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:58,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:58,484 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:58,485 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2020-09-24 21:42:58,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d869eb7c/1bee5060aca24a93a29589d6d053487d/FLAG1485f8433 [2020-09-24 21:42:59,230 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:59,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label36.c [2020-09-24 21:42:59,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d869eb7c/1bee5060aca24a93a29589d6d053487d/FLAG1485f8433 [2020-09-24 21:42:59,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d869eb7c/1bee5060aca24a93a29589d6d053487d [2020-09-24 21:42:59,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:59,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:59,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:59,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:59,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:59,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fa69d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:59, skipping insertion in model container [2020-09-24 21:42:59,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:59,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:00,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,174 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:00,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,302 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:00,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00 WrapperNode [2020-09-24 21:43:00,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:00,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:00,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:00,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:00,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:00,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:00,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (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 21:43:00,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:00,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:00,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:00,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:01,861 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:01,862 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:01,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01 BoogieIcfgContainer [2020-09-24 21:43:01,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:01,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:01,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:01,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:01,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:59" (1/3) ... [2020-09-24 21:43:01,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2190fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:01, skipping insertion in model container [2020-09-24 21:43:01,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (2/3) ... [2020-09-24 21:43:01,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2190fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:01, skipping insertion in model container [2020-09-24 21:43:01,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01" (3/3) ... [2020-09-24 21:43:01,894 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label36.c [2020-09-24 21:43:01,906 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:01,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:01,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:01,984 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:01,985 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:01,985 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:01,985 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:01,985 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:01,985 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:01,985 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:01,986 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 21:43:02,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:02,041 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, 1, 1] [2020-09-24 21:43:02,041 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash -404902623, now seen corresponding path program 1 times [2020-09-24 21:43:02,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:02,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575905798] [2020-09-24 21:43:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:07,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:07,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 21:43:07,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:07,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:43:07,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:07,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:08,063 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:08,218 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:43:08,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:08,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:08,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:08,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:08,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:08,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 21:43:08,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:08,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:09,130 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 21:43:09,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575905798] [2020-09-24 21:43:09,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:09,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:09,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505792702] [2020-09-24 21:43:09,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:09,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:09,169 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:09,739 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:10,016 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:43:10,279 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:43:10,965 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:43:11,424 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:43:12,639 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:43:12,858 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:43:13,230 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:43:14,005 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:43:14,555 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:43:14,793 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:43:15,865 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:43:16,345 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:43:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:19,036 INFO L93 Difference]: Finished difference Result 1871 states and 2663 transitions. [2020-09-24 21:43:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:19,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 158 [2020-09-24 21:43:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:19,080 INFO L225 Difference]: With dead ends: 1871 [2020-09-24 21:43:19,080 INFO L226 Difference]: Without dead ends: 1243 [2020-09-24 21:43:19,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2020-09-24 21:43:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1076. [2020-09-24 21:43:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1295 transitions. [2020-09-24 21:43:19,227 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1295 transitions. Word has length 158 [2020-09-24 21:43:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:19,228 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1295 transitions. [2020-09-24 21:43:19,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1295 transitions. [2020-09-24 21:43:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 21:43:19,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:19,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:19,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:19,245 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1624607514, now seen corresponding path program 1 times [2020-09-24 21:43:19,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:19,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097441368] [2020-09-24 21:43:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:22,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:24,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 21:43:24,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:43:24,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:43:24,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:43:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 21:43:24,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:25,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:25,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:25,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:25,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:25,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 21:43:25,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:25,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:25,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:25,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:25,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:25,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:25,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:43:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:26,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097441368] [2020-09-24 21:43:26,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:26,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:43:26,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263997730] [2020-09-24 21:43:26,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:43:26,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:43:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:43:26,332 INFO L87 Difference]: Start difference. First operand 1076 states and 1295 transitions. Second operand 23 states. [2020-09-24 21:43:27,243 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-09-24 21:43:29,023 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-09-24 21:43:29,646 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-09-24 21:43:30,148 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-09-24 21:43:30,848 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-09-24 21:43:31,623 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-09-24 21:43:31,968 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-09-24 21:43:32,323 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-09-24 21:43:32,854 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-09-24 21:43:33,228 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-09-24 21:43:34,396 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-09-24 21:43:34,797 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:43:35,170 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:43:35,618 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-24 21:43:36,287 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-09-24 21:43:36,844 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-09-24 21:43:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:39,171 INFO L93 Difference]: Finished difference Result 2562 states and 3131 transitions. [2020-09-24 21:43:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:43:39,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 175 [2020-09-24 21:43:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:39,183 INFO L225 Difference]: With dead ends: 2562 [2020-09-24 21:43:39,183 INFO L226 Difference]: Without dead ends: 1566 [2020-09-24 21:43:39,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=784, Invalid=1972, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 21:43:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2020-09-24 21:43:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1340. [2020-09-24 21:43:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-09-24 21:43:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1626 transitions. [2020-09-24 21:43:39,254 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1626 transitions. Word has length 175 [2020-09-24 21:43:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:39,255 INFO L479 AbstractCegarLoop]: Abstraction has 1340 states and 1626 transitions. [2020-09-24 21:43:39,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:43:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1626 transitions. [2020-09-24 21:43:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 21:43:39,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:39,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:39,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:39,264 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1823974275, now seen corresponding path program 1 times [2020-09-24 21:43:39,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:39,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24502088] [2020-09-24 21:43:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:39,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-09-24 21:43:44,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:44,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:43:44,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:44,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:44,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:44,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:43:44,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:45,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:45,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:45,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:45,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:45,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:43:45,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:45,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:45,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24502088] [2020-09-24 21:43:45,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:45,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:45,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156383414] [2020-09-24 21:43:45,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:45,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:45,509 INFO L87 Difference]: Start difference. First operand 1340 states and 1626 transitions. Second operand 19 states. [2020-09-24 21:43:46,289 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-24 21:43:46,787 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:43:47,067 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-09-24 21:43:47,663 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-09-24 21:43:47,892 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-09-24 21:43:48,164 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:43:48,641 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-09-24 21:43:48,951 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:43:49,133 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-09-24 21:43:49,587 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-09-24 21:43:49,893 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75