./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/bresenham-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/bresenham-ll.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 68505a1040934ea3cdccf61a3fb1a3debf8c6c64330c175637d96b2737c92d5f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:38:12,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:38:12,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:38:12,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:38:12,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:38:12,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:38:12,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:38:12,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:38:12,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:38:12,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:38:12,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:38:12,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:38:12,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:38:12,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:38:12,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:38:12,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:38:12,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:38:12,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:38:12,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:38:12,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:38:12,989 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:38:12,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:38:12,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:38:12,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:38:12,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:38:12,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:38:12,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:38:12,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:38:12,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:38:12,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:38:12,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:38:12,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:38:13,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:38:13,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:38:13,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:38:13,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:38:13,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:38:13,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:38:13,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:38:13,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:38:13,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:38:13,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:38:13,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:38:13,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:38:13,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:38:13,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:38:13,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:38:13,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:38:13,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:38:13,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:38:13,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:38:13,028 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:38:13,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:38:13,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:38:13,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:38:13,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:38:13,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:38:13,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:38:13,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:38:13,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:38:13,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:38:13,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:38:13,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:38:13,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:38:13,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:38:13,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:38:13,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:38:13,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:38:13,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:38:13,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:38:13,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:38:13,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:38:13,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:38:13,032 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:38:13,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:38:13,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:38:13,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68505a1040934ea3cdccf61a3fb1a3debf8c6c64330c175637d96b2737c92d5f [2022-07-22 15:38:13,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:38:13,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:38:13,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:38:13,310 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:38:13,311 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:38:13,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/bresenham-ll.c [2022-07-22 15:38:13,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c23020b5/2d2ff847e4d3429f8a63342da3f92780/FLAG94c1c7fc4 [2022-07-22 15:38:13,840 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:38:13,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/bresenham-ll.c [2022-07-22 15:38:13,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c23020b5/2d2ff847e4d3429f8a63342da3f92780/FLAG94c1c7fc4 [2022-07-22 15:38:13,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c23020b5/2d2ff847e4d3429f8a63342da3f92780 [2022-07-22 15:38:13,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:38:13,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:38:13,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:38:13,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:38:13,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:38:13,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:38:13" (1/1) ... [2022-07-22 15:38:13,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5691fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:13, skipping insertion in model container [2022-07-22 15:38:13,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:38:13" (1/1) ... [2022-07-22 15:38:13,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:38:13,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:38:14,042 WARN L230 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/bresenham-ll.c[597,610] [2022-07-22 15:38:14,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:38:14,065 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:38:14,074 WARN L230 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/bresenham-ll.c[597,610] [2022-07-22 15:38:14,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:38:14,092 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:38:14,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14 WrapperNode [2022-07-22 15:38:14,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:38:14,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:38:14,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:38:14,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:38:14,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,120 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-07-22 15:38:14,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:38:14,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:38:14,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:38:14,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:38:14,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:38:14,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:38:14,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:38:14,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:38:14,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (1/1) ... [2022-07-22 15:38:14,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:38:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:14,175 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) [2022-07-22 15:38:14,176 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 [2022-07-22 15:38:14,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:38:14,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:38:14,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:38:14,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:38:14,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:38:14,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:38:14,260 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:38:14,262 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:38:14,440 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:38:14,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:38:14,445 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 15:38:14,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:38:14 BoogieIcfgContainer [2022-07-22 15:38:14,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:38:14,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:38:14,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:38:14,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:38:14,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:38:13" (1/3) ... [2022-07-22 15:38:14,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6403b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:38:14, skipping insertion in model container [2022-07-22 15:38:14,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:14" (2/3) ... [2022-07-22 15:38:14,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6403b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:38:14, skipping insertion in model container [2022-07-22 15:38:14,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:38:14" (3/3) ... [2022-07-22 15:38:14,462 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2022-07-22 15:38:14,475 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:38:14,476 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:38:14,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:38:14,543 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c344823, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5341bf27 [2022-07-22 15:38:14,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:38:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:38:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 15:38:14,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:14,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:14,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1811601823, now seen corresponding path program 1 times [2022-07-22 15:38:14,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:14,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675740283] [2022-07-22 15:38:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:14,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:14,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101273394] [2022-07-22 15:38:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:14,685 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) [2022-07-22 15:38:14,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:38:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 15:38:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:14,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:38:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675740283] [2022-07-22 15:38:14,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101273394] [2022-07-22 15:38:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101273394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:38:14,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:38:14,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:38:14,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987563631] [2022-07-22 15:38:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:38:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:38:14,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:38:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:38:14,991 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-07-22 15:38:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:15,115 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-22 15:38:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:38:15,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2022-07-22 15:38:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:15,125 INFO L225 Difference]: With dead ends: 50 [2022-07-22 15:38:15,125 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 15:38:15,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:38:15,132 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:15,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:38:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 15:38:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 15:38:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:38:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 15:38:15,167 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2022-07-22 15:38:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:15,168 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 15:38:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-07-22 15:38:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 15:38:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 15:38:15,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:15,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:15,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:15,395 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 [2022-07-22 15:38:15,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -343010020, now seen corresponding path program 1 times [2022-07-22 15:38:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971066418] [2022-07-22 15:38:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:15,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008587481] [2022-07-22 15:38:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:15,421 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) [2022-07-22 15:38:15,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:38:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 15:38:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:38:15,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:38:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971066418] [2022-07-22 15:38:15,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008587481] [2022-07-22 15:38:15,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008587481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:15,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:15,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-07-22 15:38:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116238968] [2022-07-22 15:38:15,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:15,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 15:38:15,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 15:38:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:38:15,753 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:38:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:16,022 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-07-22 15:38:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:38:16,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-22 15:38:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:16,024 INFO L225 Difference]: With dead ends: 36 [2022-07-22 15:38:16,025 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 15:38:16,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:38:16,027 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:16,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:38:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 15:38:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-07-22 15:38:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 15:38:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-22 15:38:16,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2022-07-22 15:38:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:16,035 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-22 15:38:16,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:38:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-22 15:38:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 15:38:16,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:16,040 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:16,261 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 [2022-07-22 15:38:16,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1156539182, now seen corresponding path program 1 times [2022-07-22 15:38:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147295917] [2022-07-22 15:38:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:16,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511180708] [2022-07-22 15:38:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:16,279 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) [2022-07-22 15:38:16,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:38:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:38:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:38:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:38:17,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147295917] [2022-07-22 15:38:17,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511180708] [2022-07-22 15:38:17,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511180708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:17,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:17,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-07-22 15:38:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674126710] [2022-07-22 15:38:17,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 15:38:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 15:38:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-22 15:38:17,101 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 15:38:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:17,955 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-07-22 15:38:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 15:38:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-07-22 15:38:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:17,956 INFO L225 Difference]: With dead ends: 37 [2022-07-22 15:38:17,956 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 15:38:17,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 15:38:17,958 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:17,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:38:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 15:38:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 15:38:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:38:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 15:38:17,960 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2022-07-22 15:38:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:17,960 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 15:38:17,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 15:38:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 15:38:17,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 15:38:17,963 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 15:38:17,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:38:18,179 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 [2022-07-22 15:38:18,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 15:38:18,731 INFO L895 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (let ((.cse1 (* 2 |ULTIMATE.start_main_~Y~0#1|)) (.cse0 (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2)) (.cse2 (* 2 |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (* 2 |ULTIMATE.start_main_~yx~0#1|))) (and (= (+ (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ .cse0 .cse1)) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| .cse2) (+ .cse3 .cse1)) (or (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~X~0#1|) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse2) (+ .cse3 (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))))) [2022-07-22 15:38:18,732 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-22 15:38:18,732 INFO L899 garLoopResultBuilder]: For program point L33-1(lines 30 45) no Hoare annotation was computed. [2022-07-22 15:38:18,732 INFO L902 garLoopResultBuilder]: At program point L50(lines 21 51) the Hoare annotation is: true [2022-07-22 15:38:18,733 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2)) (.cse1 (* 2 |ULTIMATE.start_main_~Y~0#1|))) (and (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 |ULTIMATE.start_main_~xy~0#1|)) (+ .cse0 (* 2 |ULTIMATE.start_main_~yx~0#1|) .cse1)) (= (+ (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ .cse2 .cse1)) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ .cse0 .cse2 .cse1)))) [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point L48-1(line 48) no Hoare annotation was computed. [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 43) no Hoare annotation was computed. [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point L38-2(lines 38 43) no Hoare annotation was computed. [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-22 15:38:18,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-22 15:38:18,734 INFO L895 garLoopResultBuilder]: At program point L30-2(lines 30 45) the Hoare annotation is: (let ((.cse0 (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2))) (and (= (+ .cse0 |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2) (* 2 |ULTIMATE.start_main_~Y~0#1|))) (or (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~X~0#1|) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse0) (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))))) [2022-07-22 15:38:18,734 INFO L899 garLoopResultBuilder]: For program point L30-3(lines 30 45) no Hoare annotation was computed. [2022-07-22 15:38:18,734 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-07-22 15:38:18,734 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-07-22 15:38:18,734 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-07-22 15:38:18,734 INFO L899 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-07-22 15:38:18,735 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-07-22 15:38:18,735 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-07-22 15:38:18,738 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 15:38:18,739 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 15:38:18,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 03:38:18 BoogieIcfgContainer [2022-07-22 15:38:18,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 15:38:18,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 15:38:18,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 15:38:18,753 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 15:38:18,753 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:38:14" (3/4) ... [2022-07-22 15:38:18,756 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 15:38:18,761 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-22 15:38:18,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-22 15:38:18,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-22 15:38:18,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 15:38:18,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 15:38:18,802 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 15:38:18,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 15:38:18,803 INFO L158 Benchmark]: Toolchain (without parser) took 4937.58ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 56.1MB in the beginning and 63.3MB in the end (delta: -7.2MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,803 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:38:18,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.67ms. Allocated memory is still 88.1MB. Free memory was 55.9MB in the beginning and 64.4MB in the end (delta: -8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.14ms. Allocated memory is still 88.1MB. Free memory was 64.4MB in the beginning and 62.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,804 INFO L158 Benchmark]: Boogie Preprocessor took 16.56ms. Allocated memory is still 88.1MB. Free memory was 62.8MB in the beginning and 62.0MB in the end (delta: 810.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:38:18,808 INFO L158 Benchmark]: RCFGBuilder took 308.98ms. Allocated memory is still 88.1MB. Free memory was 61.7MB in the beginning and 52.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,809 INFO L158 Benchmark]: TraceAbstraction took 4303.73ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 51.7MB in the beginning and 65.7MB in the end (delta: -14.0MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,809 INFO L158 Benchmark]: Witness Printer took 49.80ms. Allocated memory is still 107.0MB. Free memory was 65.7MB in the beginning and 63.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 15:38:18,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.67ms. Allocated memory is still 88.1MB. Free memory was 55.9MB in the beginning and 64.4MB in the end (delta: -8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.14ms. Allocated memory is still 88.1MB. Free memory was 64.4MB in the beginning and 62.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.56ms. Allocated memory is still 88.1MB. Free memory was 62.8MB in the beginning and 62.0MB in the end (delta: 810.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 308.98ms. Allocated memory is still 88.1MB. Free memory was 61.7MB in the beginning and 52.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4303.73ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 51.7MB in the beginning and 65.7MB in the end (delta: -14.0MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * Witness Printer took 49.80ms. Allocated memory is still 107.0MB. Free memory was 65.7MB in the beginning and 63.3MB in the end (delta: 2.4MB). 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 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 73 mSDsluCounter, 135 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 107 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 563 IncrementalHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 28 mSDtfsCounter, 563 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, InterpolantAutomatonStates: 45, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 14 PreInvPairs, 28 NumberOfFragments, 156 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 503 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 734 SizeOfPredicates, 13 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 22/30 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: X * y * 2 + X + v == Y * x * 2 + 2 * Y && (x <= X || 2 * y + X * y * 2 == 2 * (x * y)) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-22 15:38:18,831 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 Writing output log to file Ultimate.log Result: TRUE