/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:23:56,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:23:56,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:23:56,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:23:56,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:23:56,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:23:56,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:23:56,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:23:56,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:23:56,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:23:56,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:23:56,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:23:56,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:23:56,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:23:56,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:23:56,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:23:56,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:23:56,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:23:56,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:23:56,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:23:56,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:23:56,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:23:56,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:23:56,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:23:56,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:23:56,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:23:56,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:23:56,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:23:56,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:23:56,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:23:56,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:23:56,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:23:56,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:23:56,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:23:56,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:23:56,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:23:56,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:23:56,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:23:56,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:23:56,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:23:56,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:23:56,586 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 [2020-08-22 02:23:56,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:23:56,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:23:56,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:23:56,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:23:56,610 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:23:56,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:23:56,611 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:23:56,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:23:56,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:23:56,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:23:56,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:23:56,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:23:56,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:23:56,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:23:56,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:23:56,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:23:56,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:23:56,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:23:56,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:23:56,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:23:56,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:23:56,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:23:56,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:23:56,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:23:56,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:23:56,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:23:56,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:23:56,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:23:56,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:23:56,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:23:56,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:23:56,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:23:56,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:23:56,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:23:56,930 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:23:56,930 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:23:56,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfc9ff34/62e18339e9e54ccc8b6b209e902dabd1/FLAGad1692fdc [2020-08-22 02:23:57,698 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:23:57,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:23:57,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfc9ff34/62e18339e9e54ccc8b6b209e902dabd1/FLAGad1692fdc [2020-08-22 02:23:57,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfc9ff34/62e18339e9e54ccc8b6b209e902dabd1 [2020-08-22 02:23:57,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:23:57,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:23:57,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:23:57,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:23:57,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:23:57,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:23:57" (1/1) ... [2020-08-22 02:23:57,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601c5801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:23:57, skipping insertion in model container [2020-08-22 02:23:57,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:23:57" (1/1) ... [2020-08-22 02:23:57,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:23:58,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:23:59,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:23:59,520 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:24:00,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:24:00,887 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:24:00,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00 WrapperNode [2020-08-22 02:24:00,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:24:00,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:24:00,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:24:00,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:24:00,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:00,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:00,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:00,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:01,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:01,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:01,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... [2020-08-22 02:24:01,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:24:01,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:24:01,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:24:01,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:24:01,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:24:01,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:24:01,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:24:01,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 02:24:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:24:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:24:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 02:24:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 02:24:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 02:24:01,253 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 02:24:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 02:24:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 02:24:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 02:24:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 02:24:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 02:24:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 02:24:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 02:24:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 02:24:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-22 02:24:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 02:24:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 02:24:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:24:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:24:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:24:05,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:24:05,303 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:24:05,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:05 BoogieIcfgContainer [2020-08-22 02:24:05,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:24:05,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:24:05,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:24:05,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:24:05,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:23:57" (1/3) ... [2020-08-22 02:24:05,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc4e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:05, skipping insertion in model container [2020-08-22 02:24:05,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:24:00" (2/3) ... [2020-08-22 02:24:05,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc4e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:24:05, skipping insertion in model container [2020-08-22 02:24:05,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:24:05" (3/3) ... [2020-08-22 02:24:05,325 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 02:24:05,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:24:05,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:24:05,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:24:05,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:24:05,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:24:05,388 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:24:05,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:24:05,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:24:05,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:24:05,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:24:05,389 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:24:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-08-22 02:24:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 02:24:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:05,472 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:05,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-08-22 02:24:05,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:05,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621187518] [2020-08-22 02:24:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:07,864 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 02:24:07,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:24:08,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621187518] [2020-08-22 02:24:08,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:08,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:08,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896079861] [2020-08-22 02:24:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:08,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:08,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:08,326 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-08-22 02:24:09,136 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-08-22 02:24:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:18,894 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-08-22 02:24:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:18,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-08-22 02:24:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:18,938 INFO L225 Difference]: With dead ends: 2262 [2020-08-22 02:24:18,939 INFO L226 Difference]: Without dead ends: 1993 [2020-08-22 02:24:18,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-08-22 02:24:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-08-22 02:24:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-08-22 02:24:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-08-22 02:24:19,115 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-08-22 02:24:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:19,118 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-08-22 02:24:19,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-08-22 02:24:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 02:24:19,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:19,132 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:19,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:24:19,133 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:19,134 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-08-22 02:24:19,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:19,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410906355] [2020-08-22 02:24:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:21,510 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 02:24:21,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:24:21,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410906355] [2020-08-22 02:24:21,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:21,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:24:21,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078412412] [2020-08-22 02:24:21,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:24:21,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:24:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:24:21,991 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-08-22 02:24:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:36,396 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-08-22 02:24:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:24:36,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-08-22 02:24:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:36,419 INFO L225 Difference]: With dead ends: 5904 [2020-08-22 02:24:36,420 INFO L226 Difference]: Without dead ends: 3930 [2020-08-22 02:24:36,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:24:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-08-22 02:24:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-08-22 02:24:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-08-22 02:24:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-08-22 02:24:36,596 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-08-22 02:24:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:36,596 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-08-22 02:24:36,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:24:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-08-22 02:24:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-08-22 02:24:36,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:36,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:36,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:24:36,616 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-08-22 02:24:36,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:36,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179542623] [2020-08-22 02:24:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:37,858 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 02:24:37,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:24:38,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179542623] [2020-08-22 02:24:38,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:38,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:38,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697308980] [2020-08-22 02:24:38,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:38,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:38,151 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-08-22 02:24:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:24:53,882 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-08-22 02:24:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:24:53,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-08-22 02:24:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:24:53,920 INFO L225 Difference]: With dead ends: 11482 [2020-08-22 02:24:53,920 INFO L226 Difference]: Without dead ends: 7768 [2020-08-22 02:24:53,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-08-22 02:24:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-08-22 02:24:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-08-22 02:24:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-08-22 02:24:54,204 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-08-22 02:24:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:24:54,205 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-08-22 02:24:54,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:24:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-08-22 02:24:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-08-22 02:24:54,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:24:54,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:24:54,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:24:54,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:24:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:24:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-08-22 02:24:54,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:24:54,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505310947] [2020-08-22 02:24:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:24:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:55,128 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-08-22 02:24:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:24:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:24:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:24:55,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505310947] [2020-08-22 02:24:55,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:24:55,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:24:55,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596359266] [2020-08-22 02:24:55,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:24:55,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:24:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:24:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:24:55,277 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states.