/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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:52,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:52,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:53,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:53,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:53,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:53,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:53,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:53,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:53,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:53,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:53,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:53,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:53,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:53,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:53,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:53,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:53,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:53,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:53,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:53,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:53,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:53,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:53,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:53,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:53,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:53,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:53,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:53,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:53,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:53,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:53,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:53,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:53,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:53,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:53,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:53,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:53,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:53,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:53,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:53,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:53,046 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 21:43:53,098 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:53,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:53,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:53,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:53,102 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:53,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:53,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:53,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:53,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:53,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:53,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:53,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:53,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:53,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:53,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:53,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:53,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:53,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:53,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:53,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:53,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:53,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:53,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:53,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:53,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:53,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:53,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:53,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:53,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:53,109 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 21:43:53,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:53,607 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:53,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:53,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:53,613 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:53,614 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-24 21:43:53,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ecd0453a/faac1562ee394eadae1077e3486d9bbe/FLAG8ef29eec2 [2020-09-24 21:43:54,342 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:54,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-24 21:43:54,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ecd0453a/faac1562ee394eadae1077e3486d9bbe/FLAG8ef29eec2 [2020-09-24 21:43:54,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ecd0453a/faac1562ee394eadae1077e3486d9bbe [2020-09-24 21:43:54,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:54,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:54,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:54,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:54,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:54,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:54" (1/1) ... [2020-09-24 21:43:54,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:54, skipping insertion in model container [2020-09-24 21:43:54,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:54" (1/1) ... [2020-09-24 21:43:54,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:54,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:55,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:55,208 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:55,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:55,456 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:55,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55 WrapperNode [2020-09-24 21:43:55,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:55,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:55,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:55,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:55,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (1/1) ... [2020-09-24 21:43:55,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:55,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:55,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:55,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:55,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (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 21:43:55,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:55,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:55,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:55,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:57,068 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:57,068 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:57,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:57 BoogieIcfgContainer [2020-09-24 21:43:57,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:57,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:57,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:57,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:57,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:54" (1/3) ... [2020-09-24 21:43:57,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:57, skipping insertion in model container [2020-09-24 21:43:57,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:55" (2/3) ... [2020-09-24 21:43:57,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:57, skipping insertion in model container [2020-09-24 21:43:57,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:57" (3/3) ... [2020-09-24 21:43:57,088 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label56.c [2020-09-24 21:43:57,100 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:57,112 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:57,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:57,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:57,172 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:57,172 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:57,172 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:57,172 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:57,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:57,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:57,173 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 21:43:57,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:57,230 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] [2020-09-24 21:43:57,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash -934155158, now seen corresponding path program 1 times [2020-09-24 21:43:57,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:57,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100677907] [2020-09-24 21:43:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:02,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 21:44:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:44:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:44:02,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:44:02,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:44:02,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:44:03,382 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-09-24 21:44:03,578 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-09-24 21:44:03,797 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2020-09-24 21:44:03,986 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-09-24 21:44:04,157 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-09-24 21:44:04,315 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2020-09-24 21:44:04,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:04,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:04,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 21:44:04,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:04,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:04,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,809 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 21:44:04,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100677907] [2020-09-24 21:44:04,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:44:04,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:44:04,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794472471] [2020-09-24 21:44:04,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:44:04,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:44:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:44:04,841 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:44:05,300 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:44:05,493 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-24 21:44:05,853 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-09-24 21:44:06,248 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2020-09-24 21:44:07,013 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-09-24 21:44:07,514 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2020-09-24 21:44:07,680 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:44:08,791 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-09-24 21:44:09,050 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2020-09-24 21:44:09,387 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 21:44:10,235 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-09-24 21:44:10,787 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-09-24 21:44:11,015 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:44:12,100 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:44:12,547 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:44:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:15,234 INFO L93 Difference]: Finished difference Result 1861 states and 2653 transitions. [2020-09-24 21:44:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:44:15,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 149 [2020-09-24 21:44:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:15,269 INFO L225 Difference]: With dead ends: 1861 [2020-09-24 21:44:15,269 INFO L226 Difference]: Without dead ends: 1232 [2020-09-24 21:44:15,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:44:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-09-24 21:44:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1070. [2020-09-24 21:44:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:44:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1288 transitions. [2020-09-24 21:44:15,444 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1288 transitions. Word has length 149 [2020-09-24 21:44:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:15,445 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1288 transitions. [2020-09-24 21:44:15,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:44:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1288 transitions. [2020-09-24 21:44:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 21:44:15,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:15,459 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] [2020-09-24 21:44:15,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:44:15,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1385226184, now seen corresponding path program 1 times [2020-09-24 21:44:15,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:15,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836965167] [2020-09-24 21:44:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:18,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:20,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-24 21:44:20,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:44:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:44:20,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:44:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:21,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:21,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:44:21,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:21,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:21,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:21,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:21,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:21,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:21,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 21:44:21,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:21,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:21,631 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 21:44:21,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836965167] [2020-09-24 21:44:21,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:21,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:44:21,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253518338] [2020-09-24 21:44:21,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:44:21,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:44:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:44:21,636 INFO L87 Difference]: Start difference. First operand 1070 states and 1288 transitions. Second operand 19 states. [2020-09-24 21:44:22,909 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:44:23,158 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:44:23,365 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-09-24 21:44:23,948 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-09-24 21:44:24,263 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-09-24 21:44:24,765 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-09-24 21:44:25,032 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:44:25,308 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:44:26,185 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2020-09-24 21:44:26,814 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:44:27,246 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:44:28,262 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-09-24 21:44:28,990 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:44:29,425 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-09-24 21:44:29,858 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:44:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:31,669 INFO L93 Difference]: Finished difference Result 4039 states and 5380 transitions. [2020-09-24 21:44:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:44:31,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 171 [2020-09-24 21:44:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:31,697 INFO L225 Difference]: With dead ends: 4039 [2020-09-24 21:44:31,697 INFO L226 Difference]: Without dead ends: 3049 [2020-09-24 21:44:31,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:44:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-09-24 21:44:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2832. [2020-09-24 21:44:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2020-09-24 21:44:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3406 transitions. [2020-09-24 21:44:31,851 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3406 transitions. Word has length 171 [2020-09-24 21:44:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:31,853 INFO L479 AbstractCegarLoop]: Abstraction has 2832 states and 3406 transitions. [2020-09-24 21:44:31,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3406 transitions. [2020-09-24 21:44:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-24 21:44:31,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:31,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:44:31,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:31,868 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash -375129923, now seen corresponding path program 1 times [2020-09-24 21:44:31,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:31,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976352184] [2020-09-24 21:44:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:35,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:36,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:36,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:36,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-09-24 21:44:36,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:44:36,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-24 21:44:36,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:36,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:37,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:37,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:37,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:44:37,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:37,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:37,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:37,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:37,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:37,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:37,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:37,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:37,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:37,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:37,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:44:37,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:44:37,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:37,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:37,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:37,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:37,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:37,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:37,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 21:44:37,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:37,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:37,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:44:37,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976352184] [2020-09-24 21:44:37,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:37,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:44:37,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256544007] [2020-09-24 21:44:37,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:44:37,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:44:37,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:44:37,764 INFO L87 Difference]: Start difference. First operand 2832 states and 3406 transitions. Second operand 13 states. [2020-09-24 21:44:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:43,899 INFO L93 Difference]: Finished difference Result 8494 states and 11269 transitions. [2020-09-24 21:44:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:44:43,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 184 [2020-09-24 21:44:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:43,938 INFO L225 Difference]: With dead ends: 8494 [2020-09-24 21:44:43,938 INFO L226 Difference]: Without dead ends: 5392 [2020-09-24 21:44:43,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:44:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2020-09-24 21:44:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4752. [2020-09-24 21:44:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4752 states. [2020-09-24 21:44:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4752 states to 4752 states and 5893 transitions. [2020-09-24 21:44:44,127 INFO L78 Accepts]: Start accepts. Automaton has 4752 states and 5893 transitions. Word has length 184 [2020-09-24 21:44:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:44,128 INFO L479 AbstractCegarLoop]: Abstraction has 4752 states and 5893 transitions. [2020-09-24 21:44:44,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:44:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4752 states and 5893 transitions. [2020-09-24 21:44:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-24 21:44:44,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:44,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:44,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:44,150 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1140525426, now seen corresponding path program 1 times [2020-09-24 21:44:44,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:44,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591369098] [2020-09-24 21:44:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:44,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking...