./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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_unwindbound2.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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:51:28,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:51:28,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:51:29,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:51:29,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:51:29,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:51:29,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:51:29,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:51:29,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:51:29,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:51:29,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:51:29,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:51:29,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:51:29,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:51:29,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:51:29,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:51:29,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:51:29,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:51:29,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:51:29,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:51:29,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:51:29,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:51:29,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:51:29,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:51:29,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:51:29,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:51:29,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:51:29,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:51:29,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:51:29,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:51:29,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:51:29,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:51:29,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:51:29,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:51:29,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:51:29,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:51:29,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:51:29,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:51:29,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:51:29,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:51:29,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:51:29,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:51:29,108 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:51:29,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:51:29,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:51:29,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:51:29,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:51:29,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:51:29,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:51:29,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:51:29,111 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:51:29,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:51:29,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:51:29,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:51:29,113 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:51:29,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:51:29,113 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:51:29,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:51:29,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:51:29,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:51:29,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:51:29,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:51:29,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:51:29,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:51:29,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:51:29,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:51:29,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:51:29,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:51:29,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:51:29,116 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:51:29,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:51:29,117 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:51:29,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2023-02-15 11:51:29,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:51:29,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:51:29,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:51:29,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:51:29,337 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:51:29,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-02-15 11:51:30,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:51:30,460 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:51:30,461 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-02-15 11:51:30,465 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e1f1ce3/9ade8274e1f9406ba2dbc28b5f927196/FLAG5aadfbc05 [2023-02-15 11:51:30,477 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e1f1ce3/9ade8274e1f9406ba2dbc28b5f927196 [2023-02-15 11:51:30,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:51:30,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:51:30,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:51:30,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:51:30,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:51:30,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb1e483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30, skipping insertion in model container [2023-02-15 11:51:30,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:51:30,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:51:30,669 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_unwindbound2.c[709,722] [2023-02-15 11:51:30,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:51:30,703 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:51:30,714 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_unwindbound2.c[709,722] [2023-02-15 11:51:30,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:51:30,746 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:51:30,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30 WrapperNode [2023-02-15 11:51:30,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:51:30,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:51:30,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:51:30,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:51:30,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,785 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-02-15 11:51:30,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:51:30,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:51:30,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:51:30,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:51:30,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:51:30,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:51:30,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:51:30,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:51:30,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (1/1) ... [2023-02-15 11:51:30,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:51:30,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:51:30,854 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) [2023-02-15 11:51:30,858 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 [2023-02-15 11:51:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:51:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:51:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:51:30,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:51:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:51:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:51:30,942 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:51:30,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:51:31,096 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:51:31,101 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:51:31,101 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:51:31,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:51:31 BoogieIcfgContainer [2023-02-15 11:51:31,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:51:31,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:51:31,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:51:31,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:51:31,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:51:30" (1/3) ... [2023-02-15 11:51:31,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74952d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:51:31, skipping insertion in model container [2023-02-15 11:51:31,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:30" (2/3) ... [2023-02-15 11:51:31,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74952d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:51:31, skipping insertion in model container [2023-02-15 11:51:31,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:51:31" (3/3) ... [2023-02-15 11:51:31,110 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2023-02-15 11:51:31,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:51:31,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:51:31,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:51:31,165 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;@3a36df04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:51:31,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:51:31,168 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) [2023-02-15 11:51:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:51:31,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:31,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:31,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 11:51:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:51:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013678695] [2023-02-15 11:51:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:51:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:51:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013678695] [2023-02-15 11:51:31,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:51:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566261053] [2023-02-15 11:51:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:31,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:51:31,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:51:31,311 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) [2023-02-15 11:51:31,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:51:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:51:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:51:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:51:31,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:51:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566261053] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:51:31,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:51:31,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:51:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66162488] [2023-02-15 11:51:31,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:51:31,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:51:31,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:51:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:51:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:51:31,498 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) [2023-02-15 11:51:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:51:31,524 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 11:51:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:51:31,526 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 [2023-02-15 11:51:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:51:31,533 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:51:31,533 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 11:51:31,539 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 [2023-02-15 11:51:31,543 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 [2023-02-15 11:51:31,544 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] [2023-02-15 11:51:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 11:51:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 11:51:31,573 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) [2023-02-15 11:51:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 11:51:31,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 11:51:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:51:31,576 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 11:51:31,576 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) [2023-02-15 11:51:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 11:51:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:51:31,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:31,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:31,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:51:31,784 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 [2023-02-15 11:51:31,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 11:51:31,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:51:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642527554] [2023-02-15 11:51:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:51:31,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:51:31,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301474174] [2023-02-15 11:51:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:31,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:51:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:51:31,801 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) [2023-02-15 11:51:31,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:51:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:31,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:51:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:51:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:51:31,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:51:31,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:51:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642527554] [2023-02-15 11:51:31,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:51:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301474174] [2023-02-15 11:51:31,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301474174] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:51:31,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:51:31,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:51:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940687216] [2023-02-15 11:51:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:51:31,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:51:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:51:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:51:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:51:31,870 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) [2023-02-15 11:51:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:51:31,883 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 11:51:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:51:31,883 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 [2023-02-15 11:51:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:51:31,884 INFO L225 Difference]: With dead ends: 28 [2023-02-15 11:51:31,884 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 11:51:31,885 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 [2023-02-15 11:51:31,886 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 [2023-02-15 11:51:31,887 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] [2023-02-15 11:51:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 11:51:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 11:51:31,891 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) [2023-02-15 11:51:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 11:51:31,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 11:51:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:51:31,892 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 11:51:31,892 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) [2023-02-15 11:51:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 11:51:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:51:31,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:31,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:31,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:51:32,098 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 [2023-02-15 11:51:32,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:32,100 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 11:51:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:51:32,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154015876] [2023-02-15 11:51:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:51:32,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:51:32,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100003452] [2023-02-15 11:51:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:51:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:51:32,118 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) [2023-02-15 11:51:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:51:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:32,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:51:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:32,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 11:51:32,185 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 11:51:32,185 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 11:51:32,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:51:32,387 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 [2023-02-15 11:51:32,390 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-02-15 11:51:32,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 11:51:32,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:51:32 BoogieIcfgContainer [2023-02-15 11:51:32,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 11:51:32,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 11:51:32,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 11:51:32,410 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 11:51:32,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:51:31" (3/4) ... [2023-02-15 11:51:32,412 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 11:51:32,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 11:51:32,416 INFO L158 Benchmark]: Toolchain (without parser) took 1924.32ms. Allocated memory is still 155.2MB. Free memory was 127.3MB in the beginning and 102.3MB in the end (delta: 25.1MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2023-02-15 11:51:32,416 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:51:32,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.43ms. Allocated memory is still 155.2MB. Free memory was 127.1MB in the beginning and 119.4MB in the end (delta: 7.7MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2023-02-15 11:51:32,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.68ms. Allocated memory is still 155.2MB. Free memory was 119.4MB in the beginning and 117.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:51:32,418 INFO L158 Benchmark]: Boogie Preprocessor took 33.65ms. Allocated memory is still 155.2MB. Free memory was 117.3MB in the beginning and 116.6MB in the end (delta: 670.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:51:32,418 INFO L158 Benchmark]: RCFGBuilder took 282.21ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 106.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:51:32,418 INFO L158 Benchmark]: TraceAbstraction took 1302.65ms. Allocated memory is still 155.2MB. Free memory was 105.4MB in the beginning and 103.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:51:32,419 INFO L158 Benchmark]: Witness Printer took 3.47ms. Allocated memory is still 155.2MB. Free memory was 103.3MB in the beginning and 102.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:51:32,423 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.43ms. Allocated memory is still 155.2MB. Free memory was 127.1MB in the beginning and 119.4MB in the end (delta: 7.7MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.68ms. Allocated memory is still 155.2MB. Free memory was 119.4MB in the beginning and 117.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.65ms. Allocated memory is still 155.2MB. Free memory was 117.3MB in the beginning and 116.6MB in the end (delta: 670.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.21ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 106.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1302.65ms. Allocated memory is still 155.2MB. Free memory was 105.4MB in the beginning and 103.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.47ms. Allocated memory is still 155.2MB. Free memory was 103.3MB in the beginning and 102.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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++<2 [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: 1.2s, 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 [2023-02-15 11:51:32,437 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_unwindbound2.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 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:51:34,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:51:34,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:51:34,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:51:34,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:51:34,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:51:34,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:51:34,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:51:34,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:51:34,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:51:34,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:51:34,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:51:34,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:51:34,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:51:34,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:51:34,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:51:34,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:51:34,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:51:34,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:51:34,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:51:34,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:51:34,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:51:34,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:51:34,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:51:34,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:51:34,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:51:34,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:51:34,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:51:34,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:51:34,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:51:34,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:51:34,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:51:34,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:51:34,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:51:34,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:51:34,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:51:34,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:51:34,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:51:34,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:51:34,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:51:34,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:51:34,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 11:51:34,451 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:51:34,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:51:34,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:51:34,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:51:34,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:51:34,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:51:34,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:51:34,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:51:34,455 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:51:34,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:51:34,456 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:51:34,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:51:34,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:51:34,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:51:34,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:51:34,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:51:34,458 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:51:34,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:51:34,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:51:34,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:51:34,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:51:34,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:51:34,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:51:34,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:51:34,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:51:34,459 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 11:51:34,460 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 11:51:34,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:51:34,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:51:34,460 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:51:34,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:51:34,461 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 11:51:34,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:51:34,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2023-02-15 11:51:34,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:51:34,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:51:34,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:51:34,788 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:51:34,788 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:51:34,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-02-15 11:51:35,808 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:51:35,993 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:51:35,994 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2023-02-15 11:51:35,999 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8339737c4/5996b9dac0e6478887db502a648f9424/FLAGc32a720b8 [2023-02-15 11:51:36,011 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8339737c4/5996b9dac0e6478887db502a648f9424 [2023-02-15 11:51:36,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:51:36,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:51:36,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:51:36,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:51:36,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:51:36,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad59807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36, skipping insertion in model container [2023-02-15 11:51:36,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:51:36,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:51:36,182 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_unwindbound2.c[709,722] [2023-02-15 11:51:36,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:51:36,233 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:51:36,244 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_unwindbound2.c[709,722] [2023-02-15 11:51:36,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:51:36,279 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:51:36,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36 WrapperNode [2023-02-15 11:51:36,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:51:36,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:51:36,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:51:36,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:51:36,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,326 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-15 11:51:36,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:51:36,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:51:36,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:51:36,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:51:36,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:51:36,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:51:36,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:51:36,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:51:36,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (1/1) ... [2023-02-15 11:51:36,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:51:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:51:36,409 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) [2023-02-15 11:51:36,411 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 [2023-02-15 11:51:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:51:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 11:51:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:51:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:51:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:51:36,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:51:36,488 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:51:36,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:51:37,985 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:51:37,989 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:51:37,990 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 11:51:37,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:51:37 BoogieIcfgContainer [2023-02-15 11:51:37,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:51:37,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:51:37,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:51:37,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:51:37,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:51:36" (1/3) ... [2023-02-15 11:51:37,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a45a3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:51:37, skipping insertion in model container [2023-02-15 11:51:37,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:51:36" (2/3) ... [2023-02-15 11:51:37,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a45a3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:51:37, skipping insertion in model container [2023-02-15 11:51:37,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:51:37" (3/3) ... [2023-02-15 11:51:37,999 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2023-02-15 11:51:38,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:51:38,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:51:38,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:51:38,117 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;@51596f87, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:51:38,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:51:38,139 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) [2023-02-15 11:51:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:51:38,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:38,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:38,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 11:51:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:51:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379785770] [2023-02-15 11:51:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:38,167 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 [2023-02-15 11:51:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:51:38,173 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) [2023-02-15 11:51:38,187 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 [2023-02-15 11:51:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:51:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:51:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:51:38,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:51:38,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:51:38,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379785770] [2023-02-15 11:51:38,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379785770] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:51:38,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:51:38,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:51:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395199826] [2023-02-15 11:51:38,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:51:38,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:51:38,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:51:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:51:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:51:38,347 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) [2023-02-15 11:51:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:51:38,364 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 11:51:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:51:38,365 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 [2023-02-15 11:51:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:51:38,370 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:51:38,370 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 11:51:38,373 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 [2023-02-15 11:51:38,375 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 [2023-02-15 11:51:38,376 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] [2023-02-15 11:51:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 11:51:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 11:51:38,400 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) [2023-02-15 11:51:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 11:51:38,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 11:51:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:51:38,402 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 11:51:38,402 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) [2023-02-15 11:51:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 11:51:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:51:38,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:38,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:38,416 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 [2023-02-15 11:51:38,616 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 [2023-02-15 11:51:38,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 11:51:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:51:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173942962] [2023-02-15 11:51:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:38,618 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 [2023-02-15 11:51:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:51:38,621 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) [2023-02-15 11:51:38,623 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 [2023-02-15 11:51:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:51:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:51:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:51:38,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:51:38,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:51:38,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173942962] [2023-02-15 11:51:38,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173942962] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:51:38,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:51:38,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:51:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498854794] [2023-02-15 11:51:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:51:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:51:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:51:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:51:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:51:38,823 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) [2023-02-15 11:51:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:51:38,866 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 11:51:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:51:38,866 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 [2023-02-15 11:51:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:51:38,867 INFO L225 Difference]: With dead ends: 28 [2023-02-15 11:51:38,867 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 11:51:38,868 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 [2023-02-15 11:51:38,869 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 [2023-02-15 11:51:38,869 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] [2023-02-15 11:51:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 11:51:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 11:51:38,874 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) [2023-02-15 11:51:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 11:51:38,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 11:51:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:51:38,875 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 11:51:38,875 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) [2023-02-15 11:51:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 11:51:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:51:38,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:38,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:38,889 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 [2023-02-15 11:51:39,085 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 [2023-02-15 11:51:39,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 11:51:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:51:39,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92143065] [2023-02-15 11:51:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:39,087 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 [2023-02-15 11:51:39,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:51:39,089 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) [2023-02-15 11:51:39,091 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 [2023-02-15 11:51:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:39,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:51:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:39,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:51:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [269269839] [2023-02-15 11:51:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:39,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:51:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:51:39,261 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) [2023-02-15 11:51:39,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-02-15 11:51:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:51:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:51:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:51:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:51:39,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:51:39,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 11:51:39,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92143065] [2023-02-15 11:51:39,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:51:39,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269269839] [2023-02-15 11:51:39,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269269839] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:51:39,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:51:39,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:51:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278122317] [2023-02-15 11:51:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:51:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:51:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 11:51:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:51:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:51:39,480 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) [2023-02-15 11:51:41,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:43,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:45,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:47,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:51,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:54,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:51:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:51:54,016 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-02-15 11:51:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:51:54,119 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 [2023-02-15 11:51:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:51:54,120 INFO L225 Difference]: With dead ends: 33 [2023-02-15 11:51:54,120 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 11:51:54,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:51:54,122 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:51:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 14.5s Time] [2023-02-15 11:51:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 11:51:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-15 11:51:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 11:51:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-15 11:51:54,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2023-02-15 11:51:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:51:54,129 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-15 11:51:54,130 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) [2023-02-15 11:51:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-15 11:51:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 11:51:54,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:51:54,130 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:51:54,142 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 [2023-02-15 11:51:54,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:51:54,531 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 [2023-02-15 11:51:54,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:51:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:51:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-15 11:51:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 11:51:54,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119965642] [2023-02-15 11:51:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:54,532 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 [2023-02-15 11:51:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 11:51:54,534 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) [2023-02-15 11:51:54,537 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 [2023-02-15 11:51:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:54,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:51:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:54,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2023-02-15 11:51:54,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970156061] [2023-02-15 11:51:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:51:54,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 11:51:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 11:51:54,967 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) [2023-02-15 11:51:54,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-02-15 11:51:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:51:55,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:51:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat