/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:22:27,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:22:27,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:22:27,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:22:27,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:22:27,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:22:27,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:22:27,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:22:27,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:22:27,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:22:27,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:22:27,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:22:27,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:22:27,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:22:27,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:22:27,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:22:27,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:22:27,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:22:27,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:22:27,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:22:27,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:22:27,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:22:27,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:22:27,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:22:27,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:22:27,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:22:27,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:22:27,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:22:27,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:22:27,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:22:27,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:22:27,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:22:27,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:22:27,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:22:27,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:22:27,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:22:27,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:22:27,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:22:27,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:22:27,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:22:27,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:22:27,910 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 02:22:27,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:22:27,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:22:27,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:22:27,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:22:27,939 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:22:27,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:22:27,939 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:22:27,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:22:27,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:22:27,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:22:27,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:22:27,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:22:27,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:22:27,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:22:27,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:22:27,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:22:27,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:22:27,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:22:27,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:22:27,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:22:27,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:22:27,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:22:27,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:22:27,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:22:27,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:22:27,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:22:27,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:22:27,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:22:27,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:22:27,944 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 02:22:28,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:22:28,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:22:28,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:22:28,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:22:28,449 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:22:28,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 02:22:28,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79f66d020/e68a1c4fdc114c1ba9e961d118d41ece/FLAG7d9210c91 [2020-09-25 02:22:29,213 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:22:29,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 02:22:29,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79f66d020/e68a1c4fdc114c1ba9e961d118d41ece/FLAG7d9210c91 [2020-09-25 02:22:29,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79f66d020/e68a1c4fdc114c1ba9e961d118d41ece [2020-09-25 02:22:29,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:22:29,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:22:29,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:29,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:22:29,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:22:29,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:29" (1/1) ... [2020-09-25 02:22:29,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a00abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:29, skipping insertion in model container [2020-09-25 02:22:29,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:29" (1/1) ... [2020-09-25 02:22:29,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:22:29,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:22:30,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:30,404 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:22:30,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:30,683 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:22:30,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30 WrapperNode [2020-09-25 02:22:30,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:30,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:22:30,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:22:30,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:22:30,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (1/1) ... [2020-09-25 02:22:30,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:22:30,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:22:30,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:22:30,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:22:30,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (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 02:22:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:22:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:22:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:22:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:22:30,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:22:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 02:22:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 02:22:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 02:22:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:22:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:22:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 02:22:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 02:22:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 02:22:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 02:22:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 02:22:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 02:22:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:22:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:22:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:22:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:22:33,224 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:22:33,224 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:22:33,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:33 BoogieIcfgContainer [2020-09-25 02:22:33,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:22:33,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:22:33,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:22:33,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:22:33,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:22:29" (1/3) ... [2020-09-25 02:22:33,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5dfa90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:33, skipping insertion in model container [2020-09-25 02:22:33,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:30" (2/3) ... [2020-09-25 02:22:33,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5dfa90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:33, skipping insertion in model container [2020-09-25 02:22:33,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:33" (3/3) ... [2020-09-25 02:22:33,256 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 02:22:33,268 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:22:33,283 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 02:22:33,303 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 02:22:33,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:22:33,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:22:33,337 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:22:33,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:22:33,337 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:22:33,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:22:33,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:22:33,338 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:22:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-25 02:22:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 02:22:33,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:33,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:33,433 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-25 02:22:33,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:33,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517419494] [2020-09-25 02:22:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:36,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:39,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 02:22:39,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 02:22:39,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 02:22:39,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-25 02:22:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 02:22:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:22:40,030 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 02:22:40,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:40,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:40,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:40,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 02:22:40,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 02:22:40,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:40,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:40,604 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 02:22:40,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517419494] [2020-09-25 02:22:40,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034186292] [2020-09-25 02:22:40,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:40,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:40,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:40,651 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 5 states. [2020-09-25 02:22:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:49,939 INFO L93 Difference]: Finished difference Result 3246 states and 4159 transitions. [2020-09-25 02:22:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:22:49,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-25 02:22:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:49,982 INFO L225 Difference]: With dead ends: 3246 [2020-09-25 02:22:49,982 INFO L226 Difference]: Without dead ends: 1961 [2020-09-25 02:22:49,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:22:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2020-09-25 02:22:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1834. [2020-09-25 02:22:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1834 states. [2020-09-25 02:22:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2171 transitions. [2020-09-25 02:22:50,177 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2171 transitions. Word has length 465 [2020-09-25 02:22:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:50,179 INFO L479 AbstractCegarLoop]: Abstraction has 1834 states and 2171 transitions. [2020-09-25 02:22:50,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:22:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2171 transitions. [2020-09-25 02:22:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-25 02:22:50,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:50,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:50,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:22:50,194 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1171018046, now seen corresponding path program 1 times [2020-09-25 02:22:50,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:50,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079105564] [2020-09-25 02:22:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:50,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:50,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:55,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:55,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-25 02:22:55,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 02:22:55,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 02:22:55,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:22:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-09-25 02:22:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 02:22:55,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:22:55,729 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 02:22:55,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:55,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:55,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 02:22:55,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 02:22:55,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:55,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:55,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:55,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:55,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:56,034 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 02:22:56,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079105564] [2020-09-25 02:22:56,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:56,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:22:56,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71894179] [2020-09-25 02:22:56,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:22:56,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:22:56,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:22:56,041 INFO L87 Difference]: Start difference. First operand 1834 states and 2171 transitions. Second operand 4 states. [2020-09-25 02:23:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:01,795 INFO L93 Difference]: Finished difference Result 5079 states and 6064 transitions. [2020-09-25 02:23:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:23:01,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-09-25 02:23:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:01,812 INFO L225 Difference]: With dead ends: 5079 [2020-09-25 02:23:01,812 INFO L226 Difference]: Without dead ends: 3472 [2020-09-25 02:23:01,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:23:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2020-09-25 02:23:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 1836. [2020-09-25 02:23:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1836 states. [2020-09-25 02:23:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2173 transitions. [2020-09-25 02:23:01,905 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2173 transitions. Word has length 466 [2020-09-25 02:23:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:01,907 INFO L479 AbstractCegarLoop]: Abstraction has 1836 states and 2173 transitions. [2020-09-25 02:23:01,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:23:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2173 transitions. [2020-09-25 02:23:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-25 02:23:01,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:01,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:01,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:23:01,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1744253298, now seen corresponding path program 1 times [2020-09-25 02:23:01,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:01,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991127787] [2020-09-25 02:23:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:02,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:04,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:07,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:07,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 474 [2020-09-25 02:23:07,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 02:23:07,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 02:23:07,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:23:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-25 02:23:07,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-25 02:23:07,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:07,561 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 02:23:07,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:23:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:07,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:07,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:07,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 02:23:07,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:23:07,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 02:23:07,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:23:07,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:23:07,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:23:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:23:07,941 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 02:23:07,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991127787] [2020-09-25 02:23:07,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:23:07,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:23:07,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342388267] [2020-09-25 02:23:07,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:23:07,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:23:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:23:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:23:07,945 INFO L87 Difference]: Start difference. First operand 1836 states and 2173 transitions. Second operand 5 states. [2020-09-25 02:23:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:14,662 INFO L93 Difference]: Finished difference Result 4978 states and 5929 transitions. [2020-09-25 02:23:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:23:14,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2020-09-25 02:23:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:14,680 INFO L225 Difference]: With dead ends: 4978 [2020-09-25 02:23:14,680 INFO L226 Difference]: Without dead ends: 3372 [2020-09-25 02:23:14,684 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 02:23:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-09-25 02:23:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3245. [2020-09-25 02:23:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3245 states. [2020-09-25 02:23:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 3863 transitions. [2020-09-25 02:23:14,803 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 3863 transitions. Word has length 467 [2020-09-25 02:23:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:14,804 INFO L479 AbstractCegarLoop]: Abstraction has 3245 states and 3863 transitions. [2020-09-25 02:23:14,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:23:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 3863 transitions. [2020-09-25 02:23:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-09-25 02:23:14,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:14,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:14,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:23:14,814 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1593495664, now seen corresponding path program 1 times [2020-09-25 02:23:14,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:14,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860156436] [2020-09-25 02:23:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:15,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:16,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking...