/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:58,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:58,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:58,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:58,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:58,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:58,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:58,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:58,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:58,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:58,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:58,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:58,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:58,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:58,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:58,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:58,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:58,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:58,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:58,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:58,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:58,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:58,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:58,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:58,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:58,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:58,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:58,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:58,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:58,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:58,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:58,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:58,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:58,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:58,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:58,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:58,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:58,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:58,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:58,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:58,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:58,797 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 [2020-09-21 12:38:58,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:58,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:58,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:58,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:58,851 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:58,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:58,852 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:58,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:58,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:58,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:58,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:58,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:58,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:58,854 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:58,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:58,855 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:58,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:58,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:58,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:58,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:58,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:58,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:58,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:58,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:58,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:58,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:58,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:58,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:58,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:58,858 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:38:59,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:59,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:59,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:59,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:59,370 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:59,372 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:38:59,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e91729a19/f9d090db69e1410999c147b88e514903/FLAG8f9fcea0d [2020-09-21 12:39:00,130 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:00,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:39:00,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e91729a19/f9d090db69e1410999c147b88e514903/FLAG8f9fcea0d [2020-09-21 12:39:00,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e91729a19/f9d090db69e1410999c147b88e514903 [2020-09-21 12:39:00,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:00,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:00,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:00,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:00,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:00,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d1a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:00, skipping insertion in model container [2020-09-21 12:39:00,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:00" (1/1) ... [2020-09-21 12:39:00,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:00,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:01,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:01,624 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:02,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:02,162 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:02,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02 WrapperNode [2020-09-21 12:39:02,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:02,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:02,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:02,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:02,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (1/1) ... [2020-09-21 12:39:02,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:02,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:02,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:02,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:02,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (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 [2020-09-21 12:39:02,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:02,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:04,840 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:04,841 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:04,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:04 BoogieIcfgContainer [2020-09-21 12:39:04,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:04,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:04,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:04,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:04,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:00" (1/3) ... [2020-09-21 12:39:04,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b496361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:04, skipping insertion in model container [2020-09-21 12:39:04,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:02" (2/3) ... [2020-09-21 12:39:04,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b496361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:04, skipping insertion in model container [2020-09-21 12:39:04,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:04" (3/3) ... [2020-09-21 12:39:04,868 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 12:39:04,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:04,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:04,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:04,951 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:04,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:04,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:04,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:04,952 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:04,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:04,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:04,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-09-21 12:39:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-21 12:39:05,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:05,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:05,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:05,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-09-21 12:39:05,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:05,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579922090] [2020-09-21 12:39:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:07,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-09-21 12:39:07,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-09-21 12:39:07,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:39:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:39:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 12:39:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:39:08,635 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:08,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:08,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:08,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:08,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 12:39:08,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:08,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:08,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579922090] [2020-09-21 12:39:08,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:08,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:39:08,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937871587] [2020-09-21 12:39:09,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:39:09,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:39:09,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:09,026 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-09-21 12:39:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:18,646 INFO L93 Difference]: Finished difference Result 2297 states and 4081 transitions. [2020-09-21 12:39:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:39:18,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-21 12:39:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:18,690 INFO L225 Difference]: With dead ends: 2297 [2020-09-21 12:39:18,691 INFO L226 Difference]: Without dead ends: 1545 [2020-09-21 12:39:18,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-21 12:39:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-09-21 12:39:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-21 12:39:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2403 transitions. [2020-09-21 12:39:18,880 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2403 transitions. Word has length 324 [2020-09-21 12:39:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:18,881 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2403 transitions. [2020-09-21 12:39:18,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2403 transitions. [2020-09-21 12:39:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:18,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:18,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:18,892 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-09-21 12:39:18,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:18,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466062045] [2020-09-21 12:39:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:20,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:20,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:20,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:20,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:39:20,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-09-21 12:39:20,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:20,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:20,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:39:20,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-21 12:39:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:21,212 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:21,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:21,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:21,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:21,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:21,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:21,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-21 12:39:21,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:21,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:39:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:21,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466062045] [2020-09-21 12:39:21,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:21,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:21,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420894300] [2020-09-21 12:39:21,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:21,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:21,625 INFO L87 Difference]: Start difference. First operand 1543 states and 2403 transitions. Second operand 4 states. [2020-09-21 12:39:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:31,535 INFO L93 Difference]: Finished difference Result 4438 states and 6878 transitions. [2020-09-21 12:39:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:31,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:31,561 INFO L225 Difference]: With dead ends: 4438 [2020-09-21 12:39:31,562 INFO L226 Difference]: Without dead ends: 3024 [2020-09-21 12:39:31,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-09-21 12:39:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-09-21 12:39:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-21 12:39:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4682 transitions. [2020-09-21 12:39:31,767 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4682 transitions. Word has length 326 [2020-09-21 12:39:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:31,771 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4682 transitions. [2020-09-21 12:39:31,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4682 transitions. [2020-09-21 12:39:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 12:39:31,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:31,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:31,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:31,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-09-21 12:39:31,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:31,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202804906] [2020-09-21 12:39:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:33,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:33,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 12:39:33,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:39:33,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-09-21 12:39:33,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:39:33,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:39:33,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:33,831 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:33,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:33,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:33,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 12:39:33,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:34,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202804906] [2020-09-21 12:39:34,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:34,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:34,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830662072] [2020-09-21 12:39:34,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:34,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:34,053 INFO L87 Difference]: Start difference. First operand 3022 states and 4682 transitions. Second operand 4 states. [2020-09-21 12:39:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:43,131 INFO L93 Difference]: Finished difference Result 8989 states and 13911 transitions. [2020-09-21 12:39:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:43,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 12:39:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:43,164 INFO L225 Difference]: With dead ends: 8989 [2020-09-21 12:39:43,164 INFO L226 Difference]: Without dead ends: 6006 [2020-09-21 12:39:43,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2020-09-21 12:39:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3036. [2020-09-21 12:39:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3036 states. [2020-09-21 12:39:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4699 transitions. [2020-09-21 12:39:43,359 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4699 transitions. Word has length 326 [2020-09-21 12:39:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:43,360 INFO L479 AbstractCegarLoop]: Abstraction has 3036 states and 4699 transitions. [2020-09-21 12:39:43,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4699 transitions. [2020-09-21 12:39:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 12:39:43,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:43,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:43,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:39:43,372 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash -596388882, now seen corresponding path program 1 times [2020-09-21 12:39:43,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:43,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030588589] [2020-09-21 12:39:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:44,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:44,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 12:39:44,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:39:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-09-21 12:39:44,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:39:44,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:39:44,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:45,115 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 12:39:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:45,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:45,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:45,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:45,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 12:39:45,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:45,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:45,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:45,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:45,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:39:45,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030588589] [2020-09-21 12:39:45,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:45,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:45,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680134765] [2020-09-21 12:39:45,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:45,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:45,290 INFO L87 Difference]: Start difference. First operand 3036 states and 4699 transitions. Second operand 4 states. [2020-09-21 12:39:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:54,334 INFO L93 Difference]: Finished difference Result 9011 states and 13941 transitions. [2020-09-21 12:39:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:39:54,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 12:39:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:54,363 INFO L225 Difference]: With dead ends: 9011 [2020-09-21 12:39:54,363 INFO L226 Difference]: Without dead ends: 6029 [2020-09-21 12:39:54,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-09-21 12:39:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-09-21 12:39:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-09-21 12:39:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4732 transitions. [2020-09-21 12:39:54,557 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4732 transitions. Word has length 327 [2020-09-21 12:39:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:54,557 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4732 transitions. [2020-09-21 12:39:54,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4732 transitions. [2020-09-21 12:39:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 12:39:54,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:54,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:54,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:39:54,578 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-09-21 12:39:54,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:54,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886783338] [2020-09-21 12:39:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:55,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking...