/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=NARROWEST --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_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:21:59,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:21:59,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:21:59,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:21:59,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:21:59,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:21:59,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:21:59,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:21:59,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:21:59,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:21:59,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:21:59,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:21:59,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:21:59,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:21:59,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:21:59,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:21:59,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:21:59,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:21:59,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:21:59,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:21:59,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:21:59,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:21:59,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:21:59,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:21:59,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:21:59,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:21:59,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:21:59,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:21:59,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:21:59,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:21:59,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:21:59,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:21:59,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:21:59,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:21:59,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:21:59,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:21:59,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:21:59,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:21:59,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:21:59,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:21:59,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:21:59,417 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 [2020-09-25 02:21:59,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:21:59,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:21:59,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:21:59,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:21:59,462 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:21:59,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:21:59,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:21:59,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:21:59,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:21:59,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:21:59,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:21:59,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:21:59,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:21:59,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:21:59,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:21:59,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:21:59,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:21:59,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:21:59,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:21:59,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:21:59,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:21:59,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:21:59,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:21:59,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:21:59,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:21:59,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:21:59,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:21:59,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:21:59,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:21:59,469 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:21:59,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:21:59,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:21:59,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:21:59,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:21:59,945 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:21:59,946 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:00,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14136766f/f94138198eda458d816f70cd13d1749c/FLAG18324e315 [2020-09-25 02:22:00,723 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:22:00,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:00,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14136766f/f94138198eda458d816f70cd13d1749c/FLAG18324e315 [2020-09-25 02:22:00,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14136766f/f94138198eda458d816f70cd13d1749c [2020-09-25 02:22:00,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:22:00,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:22:00,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:00,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:22:00,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:22:00,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:00" (1/1) ... [2020-09-25 02:22:00,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:00, skipping insertion in model container [2020-09-25 02:22:00,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:00" (1/1) ... [2020-09-25 02:22:00,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:22:01,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:22:01,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:01,584 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:22:01,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:01,862 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:22:01,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01 WrapperNode [2020-09-25 02:22:01,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:01,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:22:01,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:22:01,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:22:01,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (1/1) ... [2020-09-25 02:22:01,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:22:01,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:22:01,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:22:01,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:22:01,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (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 [2020-09-25 02:22:02,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:22:02,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:22:02,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:22:02,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:22:02,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:22:02,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 02:22:02,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 02:22:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 02:22:02,085 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 02:22:02,086 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 02:22:02,087 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 02:22:02,088 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 02:22:02,088 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:22:02,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:22:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:22:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:22:03,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:22:03,779 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:22:03,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:03 BoogieIcfgContainer [2020-09-25 02:22:03,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:22:03,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:22:03,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:22:03,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:22:03,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:22:00" (1/3) ... [2020-09-25 02:22:03,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390d6af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:03, skipping insertion in model container [2020-09-25 02:22:03,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:01" (2/3) ... [2020-09-25 02:22:03,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390d6af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:03, skipping insertion in model container [2020-09-25 02:22:03,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:03" (3/3) ... [2020-09-25 02:22:03,819 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:03,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:22:03,857 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:22:03,882 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:22:03,946 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:22:03,946 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:22:03,946 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:22:03,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:22:03,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:22:03,947 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:22:03,947 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:22:03,947 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:22:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 02:22:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 02:22:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:04,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:22:04,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 02:22:04,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:04,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208660555] [2020-09-25 02:22:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:05,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:05,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:05,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:06,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:06,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:08,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:09,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:09,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:09,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 02:22:09,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:22:09,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-09-25 02:22:09,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 02:22:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 02:22:09,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:22:10,427 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 02:22:10,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:10,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:10,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 02:22:10,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:10,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 02:22:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:10,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:22:10,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208660555] [2020-09-25 02:22:10,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:10,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:10,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485950239] [2020-09-25 02:22:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:10,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:10,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:10,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:10,802 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 02:22:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:16,074 INFO L93 Difference]: Finished difference Result 2066 states and 2749 transitions. [2020-09-25 02:22:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:22:16,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 02:22:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:16,107 INFO L225 Difference]: With dead ends: 2066 [2020-09-25 02:22:16,107 INFO L226 Difference]: Without dead ends: 1236 [2020-09-25 02:22:16,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:22:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-09-25 02:22:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1234. [2020-09-25 02:22:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 02:22:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1502 transitions. [2020-09-25 02:22:16,261 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1502 transitions. Word has length 407 [2020-09-25 02:22:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:16,263 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1502 transitions. [2020-09-25 02:22:16,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:22:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1502 transitions. [2020-09-25 02:22:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 02:22:16,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:16,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:22:16,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:22:16,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:16,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696889, now seen corresponding path program 1 times [2020-09-25 02:22:16,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:16,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182911330] [2020-09-25 02:22:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:16,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:17,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:18,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:21,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 02:22:21,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 02:22:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-09-25 02:22:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:22:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-25 02:22:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 02:22:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:21,754 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 02:22:21,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:21,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:21,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 02:22:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 02:22:21,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:21,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:22:22,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182911330] [2020-09-25 02:22:22,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:22,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:22:22,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613082905] [2020-09-25 02:22:22,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:22:22,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:22,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:22:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:22:22,059 INFO L87 Difference]: Start difference. First operand 1234 states and 1502 transitions. Second operand 4 states. [2020-09-25 02:22:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:26,741 INFO L93 Difference]: Finished difference Result 3323 states and 4103 transitions. [2020-09-25 02:22:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:22:26,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-25 02:22:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:26,795 INFO L225 Difference]: With dead ends: 3323 [2020-09-25 02:22:26,796 INFO L226 Difference]: Without dead ends: 2294 [2020-09-25 02:22:26,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:22:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2020-09-25 02:22:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1236. [2020-09-25 02:22:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-09-25 02:22:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1504 transitions. [2020-09-25 02:22:26,902 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1504 transitions. Word has length 408 [2020-09-25 02:22:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:26,904 INFO L479 AbstractCegarLoop]: Abstraction has 1236 states and 1504 transitions. [2020-09-25 02:22:26,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:22:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1504 transitions. [2020-09-25 02:22:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 02:22:26,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:26,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:22:26,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:22:26,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2025918869, now seen corresponding path program 1 times [2020-09-25 02:22:26,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:26,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477029417] [2020-09-25 02:22:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:27,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:27,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:27,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:27,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:28,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:32,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 02:22:32,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:22:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 02:22:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 02:22:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 02:22:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:32,459 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 02:22:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:32,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:32,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 02:22:32,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:32,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 02:22:32,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:32,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:22:32,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477029417] [2020-09-25 02:22:32,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:32,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:32,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545549062] [2020-09-25 02:22:32,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:32,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:32,803 INFO L87 Difference]: Start difference. First operand 1236 states and 1504 transitions. Second operand 5 states. [2020-09-25 02:22:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:37,602 INFO L93 Difference]: Finished difference Result 3263 states and 4025 transitions. [2020-09-25 02:22:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:22:37,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 02:22:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:37,615 INFO L225 Difference]: With dead ends: 3263 [2020-09-25 02:22:37,615 INFO L226 Difference]: Without dead ends: 2235 [2020-09-25 02:22:37,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:22:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-09-25 02:22:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2233. [2020-09-25 02:22:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2233 states. [2020-09-25 02:22:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2733 transitions. [2020-09-25 02:22:37,718 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2733 transitions. Word has length 409 [2020-09-25 02:22:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:37,719 INFO L479 AbstractCegarLoop]: Abstraction has 2233 states and 2733 transitions. [2020-09-25 02:22:37,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:22:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2733 transitions. [2020-09-25 02:22:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 02:22:37,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:37,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:22:37,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:22:37,726 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 02:22:37,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:37,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564485041] [2020-09-25 02:22:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:40,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:40,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:41,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:42,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:42,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 02:22:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 02:22:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 02:22:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-25 02:22:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 02:22:42,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:43,269 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 02:22:43,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:43,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:43,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:43,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 02:22:43,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:43,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 02:22:43,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:22:43,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564485041] [2020-09-25 02:22:43,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:43,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:43,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497162319] [2020-09-25 02:22:43,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:43,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:43,468 INFO L87 Difference]: Start difference. First operand 2233 states and 2733 transitions. Second operand 5 states. [2020-09-25 02:22:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:47,533 INFO L93 Difference]: Finished difference Result 6133 states and 7551 transitions. [2020-09-25 02:22:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:22:47,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 02:22:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:47,553 INFO L225 Difference]: With dead ends: 6133 [2020-09-25 02:22:47,553 INFO L226 Difference]: Without dead ends: 4119 [2020-09-25 02:22:47,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:22:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states.