./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/nla-digbench-scaling/freire2_unwindbound20.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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:26:02,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:26:02,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:26:02,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:26:02,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:26:02,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:26:02,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:26:02,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:26:02,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:26:02,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:26:02,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:26:02,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:26:02,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:26:02,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:26:02,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:26:02,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:26:02,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:26:02,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:26:02,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:26:02,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:26:02,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:26:02,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:26:02,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:26:02,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:26:02,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:26:02,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:26:02,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:26:02,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:26:02,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:26:02,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:26:02,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:26:02,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:26:02,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:26:02,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:26:02,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:26:02,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:26:02,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:26:02,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:26:02,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:26:02,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:26:02,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:26:02,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:26:02,236 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:26:02,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:26:02,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:26:02,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:26:02,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:26:02,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:26:02,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:26:02,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:26:02,238 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:26:02,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:26:02,239 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:26:02,240 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:26:02,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:26:02,241 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:26:02,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:26:02,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:26:02,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:26:02,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:26:02,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:26:02,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:26:02,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:26:02,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:26:02,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:26:02,244 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:26:02,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2023-02-18 02:26:02,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:26:02,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:26:02,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:26:02,494 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:26:02,494 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:26:02,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-18 02:26:03,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:26:03,813 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:26:03,814 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-18 02:26:03,819 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea1d7181/3c29f429d45347e886e36799afded9e8/FLAGb80c482e2 [2023-02-18 02:26:04,185 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea1d7181/3c29f429d45347e886e36799afded9e8 [2023-02-18 02:26:04,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:26:04,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:26:04,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:26:04,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:26:04,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:26:04,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c76432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04, skipping insertion in model container [2023-02-18 02:26:04,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:26:04,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:26:04,318 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/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2023-02-18 02:26:04,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:26:04,344 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:26:04,353 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/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2023-02-18 02:26:04,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:26:04,372 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:26:04,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04 WrapperNode [2023-02-18 02:26:04,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:26:04,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:26:04,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:26:04,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:26:04,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,410 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-02-18 02:26:04,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:26:04,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:26:04,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:26:04,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:26:04,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,429 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:26:04,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:26:04,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:26:04,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:26:04,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (1/1) ... [2023-02-18 02:26:04,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:26:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:26:04,460 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) [2023-02-18 02:26:04,465 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 [2023-02-18 02:26:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:26:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:26:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:26:04,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:26:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:26:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:26:04,542 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:26:04,543 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:26:04,646 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:26:04,651 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:26:04,652 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 02:26:04,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:26:04 BoogieIcfgContainer [2023-02-18 02:26:04,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:26:04,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:26:04,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:26:04,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:26:04,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:26:04" (1/3) ... [2023-02-18 02:26:04,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96b8eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:26:04, skipping insertion in model container [2023-02-18 02:26:04,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:04" (2/3) ... [2023-02-18 02:26:04,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96b8eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:26:04, skipping insertion in model container [2023-02-18 02:26:04,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:26:04" (3/3) ... [2023-02-18 02:26:04,660 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2023-02-18 02:26:04,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:26:04,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:26:04,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:26:04,722 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;@259a6c7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:26:04,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:26:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 02:26:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 02:26:04,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:04,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:04,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-18 02:26:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:26:04,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773265018] [2023-02-18 02:26:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:26:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:26:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773265018] [2023-02-18 02:26:04,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 02:26:04,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861868420] [2023-02-18 02:26:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:26:04,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:26:04,881 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) [2023-02-18 02:26:04,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 02:26:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 02:26:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:26:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 02:26:05,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:26:05,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861868420] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:26:05,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:26:05,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:26:05,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277353733] [2023-02-18 02:26:05,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:26:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:26:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:26:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:26:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:26:05,044 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:26:05,088 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-18 02:26:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:26:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 02:26:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:26:05,097 INFO L225 Difference]: With dead ends: 40 [2023-02-18 02:26:05,097 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 02:26:05,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:26:05,102 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-18 02:26:05,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:26:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 02:26:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 02:26:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 02:26:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-18 02:26:05,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-18 02:26:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:26:05,150 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-18 02:26:05,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-18 02:26:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 02:26:05,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:05,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:05,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 02:26:05,351 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 [2023-02-18 02:26:05,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-18 02:26:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:26:05,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890763710] [2023-02-18 02:26:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:05,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:26:05,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:26:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955848121] [2023-02-18 02:26:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:05,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:26:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:26:05,370 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) [2023-02-18 02:26:05,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 02:26:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 02:26:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:26:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 02:26:05,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:26:05,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:26:05,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890763710] [2023-02-18 02:26:05,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:26:05,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955848121] [2023-02-18 02:26:05,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955848121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:26:05,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:26:05,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 02:26:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655362613] [2023-02-18 02:26:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:26:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 02:26:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:26:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 02:26:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:26:05,468 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:26:05,491 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-18 02:26:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 02:26:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 02:26:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:26:05,495 INFO L225 Difference]: With dead ends: 28 [2023-02-18 02:26:05,496 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 02:26:05,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:26:05,498 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:26:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:26:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 02:26:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 02:26:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 02:26:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-18 02:26:05,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-18 02:26:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:26:05,511 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-18 02:26:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-18 02:26:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 02:26:05,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:05,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 02:26:05,718 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 [2023-02-18 02:26:05,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-18 02:26:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:26:05,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482440791] [2023-02-18 02:26:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:26:05,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:26:05,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375576689] [2023-02-18 02:26:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:05,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:26:05,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:26:05,751 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) [2023-02-18 02:26:05,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 02:26:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:05,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 02:26:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:05,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 02:26:05,836 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 02:26:05,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 02:26:05,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 02:26:06,052 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 [2023-02-18 02:26:06,055 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-02-18 02:26:06,057 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 02:26:06,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 02:26:06 BoogieIcfgContainer [2023-02-18 02:26:06,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 02:26:06,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 02:26:06,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 02:26:06,073 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 02:26:06,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:26:04" (3/4) ... [2023-02-18 02:26:06,076 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-18 02:26:06,076 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 02:26:06,077 INFO L158 Benchmark]: Toolchain (without parser) took 1889.29ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 90.4MB in the beginning and 104.6MB in the end (delta: -14.2MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2023-02-18 02:26:06,077 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 02:26:06,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.55ms. Allocated memory is still 121.6MB. Free memory was 90.4MB in the beginning and 79.3MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 02:26:06,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.77ms. Allocated memory is still 121.6MB. Free memory was 79.3MB in the beginning and 77.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 02:26:06,079 INFO L158 Benchmark]: Boogie Preprocessor took 20.02ms. Allocated memory is still 121.6MB. Free memory was 77.8MB in the beginning and 76.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 02:26:06,079 INFO L158 Benchmark]: RCFGBuilder took 222.07ms. Allocated memory is still 121.6MB. Free memory was 76.7MB in the beginning and 66.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 02:26:06,080 INFO L158 Benchmark]: TraceAbstraction took 1416.58ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 65.8MB in the beginning and 104.6MB in the end (delta: -38.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 02:26:06,080 INFO L158 Benchmark]: Witness Printer took 4.23ms. Allocated memory is still 146.8MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 02:26:06,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.55ms. Allocated memory is still 121.6MB. Free memory was 90.4MB in the beginning and 79.3MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.77ms. Allocated memory is still 121.6MB. Free memory was 79.3MB in the beginning and 77.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.02ms. Allocated memory is still 121.6MB. Free memory was 77.8MB in the beginning and 76.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 222.07ms. Allocated memory is still 121.6MB. Free memory was 76.7MB in the beginning and 66.7MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1416.58ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 65.8MB in the beginning and 104.6MB in the end (delta: -38.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.23ms. Allocated memory is still 146.8MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 48 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-18 02:26:06,100 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 0 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/nla-digbench-scaling/freire2_unwindbound20.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 c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:26:08,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:26:08,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:26:08,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:26:08,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:26:08,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:26:08,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:26:08,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:26:08,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:26:08,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:26:08,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:26:08,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:26:08,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:26:08,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:26:08,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:26:08,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:26:08,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:26:08,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:26:08,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:26:08,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:26:08,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:26:08,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:26:08,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:26:08,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:26:08,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:26:08,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:26:08,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:26:08,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:26:08,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:26:08,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:26:08,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:26:08,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:26:08,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:26:08,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:26:08,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:26:08,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:26:08,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:26:08,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:26:08,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:26:08,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:26:08,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:26:08,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-18 02:26:08,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:26:08,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:26:08,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:26:08,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:26:08,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:26:08,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:26:08,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:26:08,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:26:08,205 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:26:08,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:26:08,206 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:26:08,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 02:26:08,207 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-18 02:26:08,208 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-18 02:26:08,208 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:26:08,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:26:08,208 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:26:08,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:26:08,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:26:08,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:26:08,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:26:08,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:26:08,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:26:08,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:26:08,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:26:08,210 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-18 02:26:08,210 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-18 02:26:08,211 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:26:08,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:26:08,211 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:26:08,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:26:08,211 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-18 02:26:08,212 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:26:08,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8425a5d05ac446a6871721d80167c62d0d4f36c759d59becfd4b9bf0feba487 [2023-02-18 02:26:08,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:26:08,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:26:08,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:26:08,574 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:26:08,574 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:26:08,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-18 02:26:09,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:26:10,050 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:26:10,051 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2023-02-18 02:26:10,056 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781e876ae/9ce7d31c625e4ca589fc9a1fb35d426c/FLAG3b7c8338b [2023-02-18 02:26:10,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/781e876ae/9ce7d31c625e4ca589fc9a1fb35d426c [2023-02-18 02:26:10,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:26:10,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:26:10,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:26:10,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:26:10,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:26:10,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b2ecf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10, skipping insertion in model container [2023-02-18 02:26:10,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:26:10,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:26:10,199 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/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2023-02-18 02:26:10,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:26:10,229 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:26:10,239 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/nla-digbench-scaling/freire2_unwindbound20.c[709,722] [2023-02-18 02:26:10,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:26:10,265 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:26:10,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10 WrapperNode [2023-02-18 02:26:10,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:26:10,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:26:10,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:26:10,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:26:10,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,296 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-18 02:26:10,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:26:10,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:26:10,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:26:10,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:26:10,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:26:10,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:26:10,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:26:10,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:26:10,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (1/1) ... [2023-02-18 02:26:10,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:26:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:26:10,362 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) [2023-02-18 02:26:10,368 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 [2023-02-18 02:26:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:26:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-18 02:26:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:26:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:26:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:26:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:26:10,451 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:26:10,453 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:26:12,822 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:26:12,827 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:26:12,827 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 02:26:12,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:26:12 BoogieIcfgContainer [2023-02-18 02:26:12,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:26:12,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:26:12,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:26:12,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:26:12,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:26:10" (1/3) ... [2023-02-18 02:26:12,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb2eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:26:12, skipping insertion in model container [2023-02-18 02:26:12,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:26:10" (2/3) ... [2023-02-18 02:26:12,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb2eab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:26:12, skipping insertion in model container [2023-02-18 02:26:12,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:26:12" (3/3) ... [2023-02-18 02:26:12,843 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2023-02-18 02:26:12,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:26:12,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:26:12,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:26:12,930 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;@7145b47b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:26:12,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:26:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 02:26:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 02:26:12,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:12,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:12,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-18 02:26:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 02:26:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245444347] [2023-02-18 02:26:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:12,962 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 [2023-02-18 02:26:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 02:26:12,963 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) [2023-02-18 02:26:12,976 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 [2023-02-18 02:26:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 02:26:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:26:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 02:26:13,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:26:13,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 02:26:13,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245444347] [2023-02-18 02:26:13,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245444347] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:26:13,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:26:13,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:26:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287245658] [2023-02-18 02:26:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:26:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:26:13,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 02:26:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:26:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:26:13,149 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:26:13,165 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-18 02:26:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:26:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 02:26:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:26:13,172 INFO L225 Difference]: With dead ends: 40 [2023-02-18 02:26:13,172 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 02:26:13,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:26:13,177 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-18 02:26:13,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:26:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 02:26:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 02:26:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 02:26:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-18 02:26:13,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-18 02:26:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:26:13,206 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-18 02:26:13,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-18 02:26:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 02:26:13,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:13,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:13,238 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 (2)] Forceful destruction successful, exit code 0 [2023-02-18 02:26:13,419 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 [2023-02-18 02:26:13,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-18 02:26:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 02:26:13,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123852736] [2023-02-18 02:26:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:13,421 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 [2023-02-18 02:26:13,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 02:26:13,422 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) [2023-02-18 02:26:13,425 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 [2023-02-18 02:26:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 02:26:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:26:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 02:26:13,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:26:13,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 02:26:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123852736] [2023-02-18 02:26:13,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123852736] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:26:13,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:26:13,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 02:26:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469109970] [2023-02-18 02:26:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:26:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 02:26:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 02:26:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 02:26:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:26:13,597 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:26:13,626 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-18 02:26:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 02:26:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 02:26:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:26:13,627 INFO L225 Difference]: With dead ends: 28 [2023-02-18 02:26:13,627 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 02:26:13,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:26:13,629 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:26:13,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:26:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 02:26:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 02:26:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 02:26:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-18 02:26:13,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-18 02:26:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:26:13,635 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-18 02:26:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-18 02:26:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 02:26:13,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:13,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:13,653 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 (3)] Forceful destruction successful, exit code 0 [2023-02-18 02:26:13,851 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 [2023-02-18 02:26:13,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-18 02:26:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 02:26:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164120625] [2023-02-18 02:26:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:13,853 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 [2023-02-18 02:26:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 02:26:13,854 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) [2023-02-18 02:26:13,857 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 [2023-02-18 02:26:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:13,961 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 02:26:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:14,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-18 02:26:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1006850636] [2023-02-18 02:26:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:14,054 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 02:26:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 02:26:14,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 02:26:14,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-02-18 02:26:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:26:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 02:26:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:26:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 02:26:14,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:26:14,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 02:26:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164120625] [2023-02-18 02:26:14,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:26:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006850636] [2023-02-18 02:26:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006850636] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:26:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:26:14,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:26:14,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910296288] [2023-02-18 02:26:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:26:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 02:26:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 02:26:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 02:26:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:26:14,238 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:16,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:18,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:20,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:22,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:24,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:27,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:29,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:33,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:35,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 02:26:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:26:35,726 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-02-18 02:26:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:26:35,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 02:26:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:26:35,839 INFO L225 Difference]: With dead ends: 34 [2023-02-18 02:26:35,839 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 02:26:35,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:26:35,841 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2023-02-18 02:26:35,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 21.4s Time] [2023-02-18 02:26:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 02:26:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-18 02:26:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 02:26:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-18 02:26:35,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 8 [2023-02-18 02:26:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:26:35,850 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-18 02:26:35,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 02:26:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-18 02:26:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 02:26:35,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:26:35,851 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:26:35,865 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 [2023-02-18 02:26:36,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2023-02-18 02:26:36,261 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=3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-18 02:26:36,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:26:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:26:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-18 02:26:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 02:26:36,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490110684] [2023-02-18 02:26:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:36,263 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 [2023-02-18 02:26:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 02:26:36,264 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2023-02-18 02:26:36,265 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 (6)] Waiting until timeout for monitored process [2023-02-18 02:26:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:36,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 02:26:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:36,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-18 02:26:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [863240682] [2023-02-18 02:26:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:26:36,826 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 02:26:36,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 02:26:36,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 02:26:36,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-02-18 02:26:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 02:26:37,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 02:26:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat