./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/modp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/modp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:13:01,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:13:01,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:13:01,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:13:01,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:13:01,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:13:01,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:13:01,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:13:01,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:13:01,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:13:01,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:13:01,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:13:01,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:13:01,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:13:01,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:13:01,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:13:01,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:13:01,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:13:01,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:13:01,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:13:01,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:13:01,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:13:01,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:13:01,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:13:01,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:13:01,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:13:01,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:13:01,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:13:01,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:13:01,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:13:01,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:13:01,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:13:01,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:13:01,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:13:01,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:13:01,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:13:01,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:13:01,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:13:01,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:13:01,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:13:01,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:13:01,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:13:01,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:13:01,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:13:01,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:13:01,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:13:01,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:13:01,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:13:01,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:13:01,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:13:01,743 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:13:01,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:13:01,743 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:13:01,744 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:13:01,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:13:01,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:13:01,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:13:01,746 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:13:01,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:13:01,747 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:13:01,747 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 [2023-02-14 22:13:01,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:13:01,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:13:01,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:13:01,942 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:13:01,942 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:13:01,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modp.c [2023-02-14 22:13:02,806 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:13:02,952 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:13:02,953 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c [2023-02-14 22:13:02,957 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea960e7d/d748a821c7cf48aea540444867fec15c/FLAG67a81cb8c [2023-02-14 22:13:02,970 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea960e7d/d748a821c7cf48aea540444867fec15c [2023-02-14 22:13:02,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:13:02,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:13:02,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:13:02,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:13:02,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:13:02,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:13:02" (1/1) ... [2023-02-14 22:13:02,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c908ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:02, skipping insertion in model container [2023-02-14 22:13:02,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:13:02" (1/1) ... [2023-02-14 22:13:02,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:13:02,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:13:03,084 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c[587,600] [2023-02-14 22:13:03,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:13:03,109 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:13:03,118 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c[587,600] [2023-02-14 22:13:03,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:13:03,140 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:13:03,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03 WrapperNode [2023-02-14 22:13:03,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:13:03,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:13:03,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:13:03,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:13:03,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,168 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2023-02-14 22:13:03,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:13:03,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:13:03,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:13:03,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:13:03,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:13:03,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:13:03,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:13:03,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:13:03,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (1/1) ... [2023-02-14 22:13:03,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:13:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:13:03,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:13:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:13:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:13:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:13:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 22:13:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:13:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:13:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:13:03,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:13:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:13:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 22:13:03,301 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:13:03,302 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:13:03,422 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:13:03,426 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:13:03,426 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 22:13:03,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:13:03 BoogieIcfgContainer [2023-02-14 22:13:03,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:13:03,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:13:03,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:13:03,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:13:03,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:13:02" (1/3) ... [2023-02-14 22:13:03,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a445be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:13:03, skipping insertion in model container [2023-02-14 22:13:03,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:13:03" (2/3) ... [2023-02-14 22:13:03,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a445be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:13:03, skipping insertion in model container [2023-02-14 22:13:03,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:13:03" (3/3) ... [2023-02-14 22:13:03,433 INFO L112 eAbstractionObserver]: Analyzing ICFG modp.c [2023-02-14 22:13:03,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:13:03,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:13:03,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:13:03,502 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@517c5b98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:13:03,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:13:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:13:03,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:13:03,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:13:03,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:13:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:13:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-14 22:13:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:13:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274225822] [2023-02-14 22:13:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:03,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:13:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:13:03,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:13:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274225822] [2023-02-14 22:13:03,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:13:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640620232] [2023-02-14 22:13:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:03,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:13:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:13:03,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:13:03,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:13:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:13:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 22:13:03,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:13:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:13:03,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:13:03,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640620232] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:13:03,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:13:03,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:13:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173889941] [2023-02-14 22:13:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:13:03,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:13:03,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:13:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:13:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:13:03,766 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:13:03,777 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-14 22:13:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:13:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:13:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:13:03,783 INFO L225 Difference]: With dead ends: 38 [2023-02-14 22:13:03,783 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 22:13:03,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:13:03,787 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:13:03,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:13:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 22:13:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 22:13:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-14 22:13:03,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-14 22:13:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:13:03,806 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-14 22:13:03,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-14 22:13:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:13:03,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:13:03,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:13:03,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 22:13:04,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 22:13:04,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:13:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:13:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-14 22:13:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:13:04,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274346157] [2023-02-14 22:13:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:13:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:13:04,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:13:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274346157] [2023-02-14 22:13:04,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:13:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796785588] [2023-02-14 22:13:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:04,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:13:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:13:04,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:13:04,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:13:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:13:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 22:13:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:13:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:13:04,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:13:04,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796785588] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:13:04,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:13:04,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:13:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267691470] [2023-02-14 22:13:04,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:13:04,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:13:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:13:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:13:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:13:04,138 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:13:04,174 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-02-14 22:13:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:13:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:13:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:13:04,176 INFO L225 Difference]: With dead ends: 37 [2023-02-14 22:13:04,177 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 22:13:04,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:13:04,179 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:13:04,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:13:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 22:13:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-14 22:13:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-14 22:13:04,182 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2023-02-14 22:13:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:13:04,183 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-14 22:13:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:13:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-14 22:13:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:13:04,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:13:04,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:13:04,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:13:04,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 22:13:04,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:13:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:13:04,385 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-14 22:13:04,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:13:04,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304562427] [2023-02-14 22:13:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:13:04,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:13:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024954796] [2023-02-14 22:13:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:13:04,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:13:04,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:13:04,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:13:04,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:13:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:13:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 22:13:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:13:04,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:13:04,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-02-14 22:13:04,731 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 22:13:04,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-02-14 22:13:04,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 22:13:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:13:05,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:13:44,234 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:13:56,811 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:14:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:14:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:14:16,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304562427] [2023-02-14 22:14:16,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:14:16,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024954796] [2023-02-14 22:14:16,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024954796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:14:16,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:14:16,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-14 22:14:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696390502] [2023-02-14 22:14:16,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:14:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 22:14:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:14:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 22:14:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=259, Unknown=21, NotChecked=0, Total=380 [2023-02-14 22:14:16,478 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:14:23,714 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 24 DAG size of output: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:14:30,191 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 26 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:14:32,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:34,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:36,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:38,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:40,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:42,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:44,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:56,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:14:58,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:00,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:27,046 WARN L233 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 42 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:15:29,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:31,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:33,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:35,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-14 22:15:35,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2023-02-14 22:15:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=268, Invalid=515, Unknown=29, NotChecked=0, Total=812 [2023-02-14 22:15:35,331 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:15:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 30 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 13 Unknown, 0 Unchecked, 29.0s Time] [2023-02-14 22:15:35,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 22:15:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:15:35,532 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2023-02-14 22:15:35,535 INFO L158 Benchmark]: Toolchain (without parser) took 152562.29ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 65.3MB in the beginning and 63.8MB in the end (delta: 1.5MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,535 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 22:15:35,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.98ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 54.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,536 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.57ms. Allocated memory is still 98.6MB. Free memory was 54.6MB in the beginning and 52.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,536 INFO L158 Benchmark]: Boogie Preprocessor took 29.02ms. Allocated memory is still 98.6MB. Free memory was 52.9MB in the beginning and 51.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,536 INFO L158 Benchmark]: RCFGBuilder took 227.27ms. Allocated memory is still 98.6MB. Free memory was 51.4MB in the beginning and 40.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,536 INFO L158 Benchmark]: TraceAbstraction took 152106.30ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 39.7MB in the beginning and 63.8MB in the end (delta: -24.1MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2023-02-14 22:15:35,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.98ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 54.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.57ms. Allocated memory is still 98.6MB. Free memory was 54.6MB in the beginning and 52.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.02ms. Allocated memory is still 98.6MB. Free memory was 52.9MB in the beginning and 51.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 227.27ms. Allocated memory is still 98.6MB. Free memory was 51.4MB in the beginning and 40.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 152106.30ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 39.7MB in the beginning and 63.8MB in the end (delta: -24.1MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/modp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:15:36,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:15:36,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:15:37,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:15:37,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:15:37,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:15:37,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:15:37,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:15:37,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:15:37,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:15:37,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:15:37,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:15:37,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:15:37,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:15:37,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:15:37,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:15:37,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:15:37,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:15:37,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:15:37,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:15:37,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:15:37,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:15:37,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:15:37,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:15:37,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:15:37,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:15:37,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:15:37,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:15:37,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:15:37,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:15:37,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:15:37,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:15:37,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:15:37,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:15:37,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:15:37,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:15:37,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:15:37,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:15:37,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:15:37,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:15:37,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:15:37,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-14 22:15:37,101 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:15:37,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:15:37,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:15:37,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:15:37,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:15:37,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:15:37,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:15:37,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:15:37,104 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:15:37,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:15:37,105 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:15:37,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:15:37,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-14 22:15:37,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-14 22:15:37,107 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:15:37,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:15:37,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:15:37,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:15:37,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:15:37,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:15:37,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:15:37,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:15:37,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:15:37,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:15:37,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:15:37,109 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-14 22:15:37,109 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-14 22:15:37,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:15:37,110 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 [2023-02-14 22:15:37,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:15:37,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:15:37,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:15:37,380 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:15:37,381 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:15:37,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modp.c [2023-02-14 22:15:38,383 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:15:38,546 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:15:38,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c [2023-02-14 22:15:38,552 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8868860e1/41b55fc18888409ca5903df8f7061149/FLAGcf851c2ab [2023-02-14 22:15:38,563 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8868860e1/41b55fc18888409ca5903df8f7061149 [2023-02-14 22:15:38,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:15:38,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:15:38,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:15:38,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:15:38,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:15:38,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14dc9542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38, skipping insertion in model container [2023-02-14 22:15:38,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:15:38,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:15:38,675 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c[587,600] [2023-02-14 22:15:38,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:15:38,694 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:15:38,703 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modp.c[587,600] [2023-02-14 22:15:38,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:15:38,716 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:15:38,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38 WrapperNode [2023-02-14 22:15:38,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:15:38,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:15:38,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:15:38,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:15:38,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,741 INFO L138 Inliner]: procedures = 19, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-02-14 22:15:38,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:15:38,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:15:38,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:15:38,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:15:38,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:15:38,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:15:38,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:15:38,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:15:38,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (1/1) ... [2023-02-14 22:15:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:15:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:15:38,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:15:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-02-14 22:15:38,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:15:38,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:15:38,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 22:15:38,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-14 22:15:38,864 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:15:38,865 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:15:39,026 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:15:39,030 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:15:39,030 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 22:15:39,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:15:39 BoogieIcfgContainer [2023-02-14 22:15:39,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:15:39,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:15:39,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:15:39,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:15:39,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:15:38" (1/3) ... [2023-02-14 22:15:39,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8d66a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:15:39, skipping insertion in model container [2023-02-14 22:15:39,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:15:38" (2/3) ... [2023-02-14 22:15:39,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8d66a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:15:39, skipping insertion in model container [2023-02-14 22:15:39,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:15:39" (3/3) ... [2023-02-14 22:15:39,041 INFO L112 eAbstractionObserver]: Analyzing ICFG modp.c [2023-02-14 22:15:39,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:15:39,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:15:39,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:15:39,103 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@156c6452, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:15:39,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:15:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:15:39,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:15:39,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:15:39,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:15:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:15:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-14 22:15:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 22:15:39,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593014177] [2023-02-14 22:15:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:15:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:15:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 22:15:39,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 22:15:39,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-14 22:15:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:15:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 22:15:39,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:15:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:15:39,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:15:39,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 22:15:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593014177] [2023-02-14 22:15:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593014177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:15:39,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:15:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:15:39,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781859444] [2023-02-14 22:15:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:15:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:15:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 22:15:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:15:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:15:39,298 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:15:39,330 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-14 22:15:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:15:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:15:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:15:39,339 INFO L225 Difference]: With dead ends: 38 [2023-02-14 22:15:39,339 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 22:15:39,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:15:39,346 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:15:39,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:15:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 22:15:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 22:15:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-14 22:15:39,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-14 22:15:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:15:39,371 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-14 22:15:39,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-14 22:15:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:15:39,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:15:39,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:15:39,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-02-14 22:15:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:15:39,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:15:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:15:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-14 22:15:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 22:15:39,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377169938] [2023-02-14 22:15:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:15:39,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:15:39,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 22:15:39,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 22:15:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-14 22:15:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:15:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 22:15:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:15:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:15:39,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:15:39,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 22:15:39,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377169938] [2023-02-14 22:15:39,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377169938] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:15:39,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:15:39,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:15:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466739497] [2023-02-14 22:15:39,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:15:39,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:15:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 22:15:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:15:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:15:39,819 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:15:39,963 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-02-14 22:15:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 22:15:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-14 22:15:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:15:39,968 INFO L225 Difference]: With dead ends: 37 [2023-02-14 22:15:39,968 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 22:15:39,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:15:39,969 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:15:39,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:15:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 22:15:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-14 22:15:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-14 22:15:39,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2023-02-14 22:15:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:15:39,977 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-14 22:15:39,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:15:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-14 22:15:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:15:39,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:15:39,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:15:39,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-02-14 22:15:40,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:15:40,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:15:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:15:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-14 22:15:40,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 22:15:40,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626675313] [2023-02-14 22:15:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:15:40,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:15:40,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 22:15:40,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 22:15:40,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-14 22:15:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:15:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 22:15:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:15:40,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:15:40,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-14 22:15:40,507 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-14 22:15:40,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 22:15:40,636 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 22:15:40,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2023-02-14 22:15:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:15:40,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:15:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:15:54,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 22:15:54,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626675313] [2023-02-14 22:15:54,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626675313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:15:54,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:15:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-02-14 22:15:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796980968] [2023-02-14 22:15:54,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:15:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 22:15:54,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 22:15:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 22:15:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=348, Unknown=3, NotChecked=0, Total=462 [2023-02-14 22:15:54,589 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:16:10,701 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 40 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:16:13,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:15,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:17,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:19,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:21,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:23,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:16:34,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 22:16:37,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:16:39,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:16:54,974 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 46 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:17:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:17:08,209 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-02-14 22:17:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 22:17:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 22:17:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:17:08,216 INFO L225 Difference]: With dead ends: 65 [2023-02-14 22:17:08,216 INFO L226 Difference]: Without dead ends: 46 [2023-02-14 22:17:08,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=543, Invalid=1615, Unknown=4, NotChecked=0, Total=2162 [2023-02-14 22:17:08,217 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 189 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 36 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:17:08,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 79 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 195 Invalid, 9 Unknown, 0 Unchecked, 26.3s Time] [2023-02-14 22:17:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-14 22:17:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2023-02-14 22:17:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:17:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-14 22:17:08,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2023-02-14 22:17:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:17:08,224 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-14 22:17:08,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:17:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-14 22:17:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 22:17:08,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:17:08,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:17:08,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:17:08,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:17:08,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:17:08,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:17:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2023-02-14 22:17:08,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 22:17:08,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420231996] [2023-02-14 22:17:08,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:17:08,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 22:17:08,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 22:17:08,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-14 22:17:08,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-14 22:17:08,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:17:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:17:08,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 22:17:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:17:08,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:17:09,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-14 22:17:09,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-14 22:17:10,005 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-02-14 22:17:10,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-02-14 22:17:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:17:10,475 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-02-14 22:17:10,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2023-02-14 22:17:10,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-02-14 22:17:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:17:11,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:17:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:17:28,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 22:17:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420231996] [2023-02-14 22:17:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420231996] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:17:28,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:17:28,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-02-14 22:17:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702175607] [2023-02-14 22:17:28,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:17:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 22:17:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 22:17:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 22:17:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=633, Unknown=2, NotChecked=0, Total=756 [2023-02-14 22:17:28,059 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)