/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=DEEPEST --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 01:13:02,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:13:02,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:13:02,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:13:02,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:13:02,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:13:02,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:13:02,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:13:02,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:13:02,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:13:02,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:13:02,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:13:02,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:13:02,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:13:02,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:13:02,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:13:02,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:13:02,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:13:02,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:13:02,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:13:02,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:13:02,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:13:02,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:13:02,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:13:02,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:13:02,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:13:02,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:13:02,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:13:02,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:13:02,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:13:02,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:13:02,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:13:02,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:13:02,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:13:02,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:13:02,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:13:02,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:13:02,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:13:02,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:13:02,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:13:02,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:13:02,955 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 01:13:02,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:13:02,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:13:02,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:13:02,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:13:02,985 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:13:02,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:13:02,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:13:02,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:13:02,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:13:02,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:13:02,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:13:02,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:13:02,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:13:02,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:13:02,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:13:02,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:13:02,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:13:02,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:13:02,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:13:02,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:13:02,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:13:02,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:13:02,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:13:02,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:13:02,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:13:02,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:13:02,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:13:02,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:13:02,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:13:02,990 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:13:03,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:13:03,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:13:03,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:13:03,493 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:13:03,494 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:13:03,495 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 01:13:03,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82428274d/bf18693cc5f94b3c9ab4f68c4c70a4fc/FLAG6613b1711 [2020-09-25 01:13:04,300 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:13:04,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 01:13:04,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82428274d/bf18693cc5f94b3c9ab4f68c4c70a4fc/FLAG6613b1711 [2020-09-25 01:13:04,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82428274d/bf18693cc5f94b3c9ab4f68c4c70a4fc [2020-09-25 01:13:04,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:13:04,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:13:04,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:13:04,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:13:04,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:13:04,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:04" (1/1) ... [2020-09-25 01:13:04,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f42e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:04, skipping insertion in model container [2020-09-25 01:13:04,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:04" (1/1) ... [2020-09-25 01:13:04,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:13:04,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:13:05,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:13:05,406 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:13:05,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:13:05,909 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:13:05,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05 WrapperNode [2020-09-25 01:13:05,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:13:05,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:13:05,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:13:05,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:13:05,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:05,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:05,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:05,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:05,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:06,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:06,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (1/1) ... [2020-09-25 01:13:06,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:13:06,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:13:06,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:13:06,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:13:06,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (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 01:13:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:13:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:13:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:13:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:13:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:13:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 01:13:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 01:13:06,155 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 01:13:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:13:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:13:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 01:13:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 01:13:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 01:13:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 01:13:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 01:13:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 01:13:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 01:13:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:13:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:13:06,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:13:08,342 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:13:08,343 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 01:13:08,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:08 BoogieIcfgContainer [2020-09-25 01:13:08,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:13:08,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:13:08,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:13:08,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:13:08,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:13:04" (1/3) ... [2020-09-25 01:13:08,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd42874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:08, skipping insertion in model container [2020-09-25 01:13:08,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:05" (2/3) ... [2020-09-25 01:13:08,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd42874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:08, skipping insertion in model container [2020-09-25 01:13:08,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:08" (3/3) ... [2020-09-25 01:13:08,378 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 01:13:08,391 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:13:08,410 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 01:13:08,434 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 01:13:08,472 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:13:08,472 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:13:08,472 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:13:08,472 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:13:08,472 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:13:08,473 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:13:08,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:13:08,473 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:13:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-25 01:13:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 01:13:08,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:08,563 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 01:13:08,564 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-25 01:13:08,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:08,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34511735] [2020-09-25 01:13:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:09,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:10,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:10,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:14,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 01:13:14,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:13:14,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-09-25 01:13:14,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:14,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:14,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-09-25 01:13:14,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 01:13:14,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:13:14,867 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 01:13:14,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:14,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:14,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 01:13:14,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:14,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 01:13:14,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:14,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:14,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:14,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:15,476 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 01:13:15,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34511735] [2020-09-25 01:13:15,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:15,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:15,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200890815] [2020-09-25 01:13:15,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:15,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:15,533 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 4 states. [2020-09-25 01:13:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:20,875 INFO L93 Difference]: Finished difference Result 2024 states and 2590 transitions. [2020-09-25 01:13:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:13:20,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2020-09-25 01:13:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:20,923 INFO L225 Difference]: With dead ends: 2024 [2020-09-25 01:13:20,923 INFO L226 Difference]: Without dead ends: 1455 [2020-09-25 01:13:20,937 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 01:13:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-09-25 01:13:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1448. [2020-09-25 01:13:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-09-25 01:13:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1727 transitions. [2020-09-25 01:13:21,076 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1727 transitions. Word has length 465 [2020-09-25 01:13:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:21,078 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 1727 transitions. [2020-09-25 01:13:21,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:13:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1727 transitions. [2020-09-25 01:13:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 01:13:21,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:21,093 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 01:13:21,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:13:21,094 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 888544568, now seen corresponding path program 1 times [2020-09-25 01:13:21,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:21,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125545918] [2020-09-25 01:13:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:21,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:21,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:21,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:25,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:26,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:26,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 01:13:26,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:13:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-09-25 01:13:26,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 01:13:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 184 [2020-09-25 01:13:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-25 01:13:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:27,049 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 01:13:27,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:27,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:27,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 01:13:27,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:27,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 01:13:27,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:27,494 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 01:13:27,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125545918] [2020-09-25 01:13:27,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:27,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:13:27,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686548020] [2020-09-25 01:13:27,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:13:27,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:13:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:13:27,501 INFO L87 Difference]: Start difference. First operand 1448 states and 1727 transitions. Second operand 5 states. [2020-09-25 01:13:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:34,918 INFO L93 Difference]: Finished difference Result 3868 states and 4663 transitions. [2020-09-25 01:13:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:13:34,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-25 01:13:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:34,932 INFO L225 Difference]: With dead ends: 3868 [2020-09-25 01:13:34,933 INFO L226 Difference]: Without dead ends: 2636 [2020-09-25 01:13:34,937 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 01:13:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2020-09-25 01:13:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2509. [2020-09-25 01:13:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2020-09-25 01:13:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3027 transitions. [2020-09-25 01:13:35,023 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3027 transitions. Word has length 465 [2020-09-25 01:13:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 2509 states and 3027 transitions. [2020-09-25 01:13:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:13:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3027 transitions. [2020-09-25 01:13:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-25 01:13:35,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:35,032 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 01:13:35,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:13:35,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash -387607008, now seen corresponding path program 1 times [2020-09-25 01:13:35,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:35,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148407180] [2020-09-25 01:13:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:35,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:35,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:35,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:37,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:40,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:40,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-25 01:13:40,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:13:40,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 01:13:40,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 01:13:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 01:13:40,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:40,608 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 01:13:40,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:40,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:40,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 01:13:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 01:13:40,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:41,071 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 01:13:41,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148407180] [2020-09-25 01:13:41,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:41,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:41,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427516606] [2020-09-25 01:13:41,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:41,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:41,080 INFO L87 Difference]: Start difference. First operand 2509 states and 3027 transitions. Second operand 4 states. [2020-09-25 01:13:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:48,205 INFO L93 Difference]: Finished difference Result 6926 states and 8406 transitions. [2020-09-25 01:13:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:13:48,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-09-25 01:13:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:48,227 INFO L225 Difference]: With dead ends: 6926 [2020-09-25 01:13:48,227 INFO L226 Difference]: Without dead ends: 4769 [2020-09-25 01:13:48,233 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 01:13:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2020-09-25 01:13:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2512. [2020-09-25 01:13:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-09-25 01:13:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3031 transitions. [2020-09-25 01:13:48,345 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3031 transitions. Word has length 466 [2020-09-25 01:13:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:48,346 INFO L479 AbstractCegarLoop]: Abstraction has 2512 states and 3031 transitions. [2020-09-25 01:13:48,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:13:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3031 transitions. [2020-09-25 01:13:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-25 01:13:48,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:48,353 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 01:13:48,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:13:48,353 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash -658511710, now seen corresponding path program 1 times [2020-09-25 01:13:48,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:48,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74163712] [2020-09-25 01:13:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:48,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:51,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking...