./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 f4b24e32 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-?-f4b24e3 [2022-07-13 16:33:09,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:33:09,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:33:09,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:33:09,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:33:09,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:33:09,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:33:09,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:33:09,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:33:09,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:33:09,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:33:09,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:33:09,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:33:09,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:33:09,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:33:09,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:33:09,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:33:09,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:33:09,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:33:09,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:33:09,141 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:33:09,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:33:09,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:33:09,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:33:09,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:33:09,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:33:09,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:33:09,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:33:09,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:33:09,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:33:09,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:33:09,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:33:09,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:33:09,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:33:09,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:33:09,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:33:09,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:33:09,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:33:09,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:33:09,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:33:09,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:33:09,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:33:09,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:33:09,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:33:09,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:33:09,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:33:09,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:33:09,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:33:09,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:33:09,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:33:09,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:33:09,185 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:33:09,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:33:09,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:33:09,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:33:09,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:33:09,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:33:09,188 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:33:09,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:33:09,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:33:09,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:33:09,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:33:09,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:33:09,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:33:09,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:33:09,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:33:09,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:33:09,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:33:09,190 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:33:09,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:33:09,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:33:09,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2022-07-13 16:33:09,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:33:09,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:33:09,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:33:09,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:33:09,386 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:33:09,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2022-07-13 16:33:09,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43b1a32d/9cc1cd8cf27a41ff852ddb99fbd5803b/FLAGe2de0f258 [2022-07-13 16:33:09,778 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:33:09,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2022-07-13 16:33:09,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43b1a32d/9cc1cd8cf27a41ff852ddb99fbd5803b/FLAGe2de0f258 [2022-07-13 16:33:10,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43b1a32d/9cc1cd8cf27a41ff852ddb99fbd5803b [2022-07-13 16:33:10,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:33:10,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:33:10,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:33:10,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:33:10,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:33:10,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fd81a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10, skipping insertion in model container [2022-07-13 16:33:10,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:33:10,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:33:10,363 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-scaling/freire2_unwindbound2.c[709,722] [2022-07-13 16:33:10,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:33:10,382 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:33:10,390 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-scaling/freire2_unwindbound2.c[709,722] [2022-07-13 16:33:10,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:33:10,406 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:33:10,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10 WrapperNode [2022-07-13 16:33:10,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:33:10,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:33:10,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:33:10,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:33:10,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,446 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-07-13 16:33:10,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:33:10,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:33:10,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:33:10,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:33:10,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:33:10,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:33:10,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:33:10,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:33:10,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (1/1) ... [2022-07-13 16:33:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:33:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:33:10,503 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) [2022-07-13 16:33:10,527 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 [2022-07-13 16:33:10,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:33:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:33:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:33:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:33:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:33:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:33:10,579 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:33:10,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:33:10,659 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:33:10,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:33:10,664 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 16:33:10,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:10 BoogieIcfgContainer [2022-07-13 16:33:10,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:33:10,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:33:10,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:33:10,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:33:10,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:33:10" (1/3) ... [2022-07-13 16:33:10,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef2012b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:33:10, skipping insertion in model container [2022-07-13 16:33:10,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:10" (2/3) ... [2022-07-13 16:33:10,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef2012b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:33:10, skipping insertion in model container [2022-07-13 16:33:10,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:10" (3/3) ... [2022-07-13 16:33:10,671 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2022-07-13 16:33:10,682 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:33:10,682 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:33:10,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:33:10,716 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@6c5d654, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7396cdb9 [2022-07-13 16:33:10,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:33:10,720 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) [2022-07-13 16:33:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 16:33:10,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:10,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:10,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-07-13 16:33:10,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:33:10,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758739473] [2022-07-13 16:33:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:10,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:33:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:33:10,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758739473] [2022-07-13 16:33:10,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758739473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:33:10,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:33:10,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:33:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563406716] [2022-07-13 16:33:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:33:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:33:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:33:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:33:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:33:10,912 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) [2022-07-13 16:33:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:33:10,927 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-07-13 16:33:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:33:10,929 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 [2022-07-13 16:33:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:33:10,937 INFO L225 Difference]: With dead ends: 40 [2022-07-13 16:33:10,937 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 16:33:10,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:33:10,944 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 [2022-07-13 16:33:10,944 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] [2022-07-13 16:33:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 16:33:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 16:33:11,015 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) [2022-07-13 16:33:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-07-13 16:33:11,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-07-13 16:33:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:33:11,016 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-07-13 16:33:11,017 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) [2022-07-13 16:33:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-07-13 16:33:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:33:11,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:11,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:33:11,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-07-13 16:33:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:33:11,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044288607] [2022-07-13 16:33:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:33:11,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:33:11,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711787425] [2022-07-13 16:33:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:11,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:33:11,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:33:11,033 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) [2022-07-13 16:33:11,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:33:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:33:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:33:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:11,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:33:11,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:33:11,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044288607] [2022-07-13 16:33:11,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:33:11,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711787425] [2022-07-13 16:33:11,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711787425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:33:11,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:33:11,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:33:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760002001] [2022-07-13 16:33:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:33:11,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:33:11,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:33:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:33:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:33:11,119 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) [2022-07-13 16:33:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:33:11,140 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-07-13 16:33:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:33:11,141 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 [2022-07-13 16:33:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:33:11,141 INFO L225 Difference]: With dead ends: 28 [2022-07-13 16:33:11,142 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 16:33:11,143 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 [2022-07-13 16:33:11,145 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 [2022-07-13 16:33:11,146 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] [2022-07-13 16:33:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 16:33:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 16:33:11,154 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) [2022-07-13 16:33:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-07-13 16:33:11,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-07-13 16:33:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:33:11,157 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-07-13 16:33:11,161 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) [2022-07-13 16:33:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-07-13 16:33:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:33:11,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:11,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:11,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:33:11,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:33:11,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-07-13 16:33:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:33:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180424404] [2022-07-13 16:33:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:33:11,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:33:11,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877410191] [2022-07-13 16:33:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:33:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:33:11,390 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) [2022-07-13 16:33:11,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:33:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 16:33:11,417 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 16:33:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 16:33:11,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 16:33:11,431 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 16:33:11,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 16:33:11,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 16:33:11,645 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,SelfDestructingSolverStorable2 [2022-07-13 16:33:11,648 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 16:33:11,650 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 16:33:11,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 04:33:11 BoogieIcfgContainer [2022-07-13 16:33:11,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 16:33:11,663 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 16:33:11,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 16:33:11,663 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 16:33:11,664 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:10" (3/4) ... [2022-07-13 16:33:11,665 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 16:33:11,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 16:33:11,666 INFO L158 Benchmark]: Toolchain (without parser) took 1440.41ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 53.5MB in the beginning and 75.6MB in the end (delta: -22.1MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2022-07-13 16:33:11,666 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:33:11,667 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.08ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 53.3MB in the beginning and 90.9MB in the end (delta: -37.6MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-13 16:33:11,667 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.22ms. Allocated memory is still 115.3MB. Free memory was 90.9MB in the beginning and 89.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:33:11,667 INFO L158 Benchmark]: Boogie Preprocessor took 31.26ms. Allocated memory is still 115.3MB. Free memory was 89.2MB in the beginning and 88.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:33:11,668 INFO L158 Benchmark]: RCFGBuilder took 185.76ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 78.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 16:33:11,668 INFO L158 Benchmark]: TraceAbstraction took 996.04ms. Allocated memory is still 115.3MB. Free memory was 77.9MB in the beginning and 76.2MB in the end (delta: 1.8MB). Peak memory consumption was 104.7kB. Max. memory is 16.1GB. [2022-07-13 16:33:11,668 INFO L158 Benchmark]: Witness Printer took 2.37ms. Allocated memory is still 115.3MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:33:11,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.08ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 53.3MB in the beginning and 90.9MB in the end (delta: -37.6MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.22ms. Allocated memory is still 115.3MB. Free memory was 90.9MB in the beginning and 89.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.26ms. Allocated memory is still 115.3MB. Free memory was 89.2MB in the beginning and 88.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 185.76ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 78.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 996.04ms. Allocated memory is still 115.3MB. Free memory was 77.9MB in the beginning and 76.2MB in the end (delta: 1.8MB). Peak memory consumption was 104.7kB. Max. memory is 16.1GB. * Witness Printer took 2.37ms. Allocated memory is still 115.3MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<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: 0.9s, 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, 9 GetRequests, 7 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47 ConjunctsInSsa, 3 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 [2022-07-13 16:33:11,694 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-?-f4b24e3 [2022-07-13 16:33:13,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:33:13,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:33:13,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:33:13,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:33:13,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:33:13,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:33:13,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:33:13,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:33:13,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:33:13,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:33:13,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:33:13,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:33:13,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:33:13,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:33:13,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:33:13,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:33:13,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:33:13,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:33:13,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:33:13,315 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:33:13,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:33:13,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:33:13,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:33:13,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:33:13,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:33:13,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:33:13,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:33:13,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:33:13,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:33:13,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:33:13,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:33:13,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:33:13,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:33:13,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:33:13,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:33:13,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:33:13,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:33:13,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:33:13,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:33:13,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:33:13,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:33:13,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 16:33:13,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:33:13,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:33:13,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:33:13,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:33:13,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:33:13,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:33:13,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:33:13,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:33:13,345 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:33:13,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:33:13,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:33:13,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 16:33:13,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 16:33:13,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 16:33:13,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:33:13,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:33:13,351 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:33:13,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:33:13,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:33:13,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:33:13,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:33:13,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:33:13,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:33:13,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:33:13,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:33:13,353 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 16:33:13,353 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 16:33:13,353 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:33:13,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:33:13,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:33:13,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 16:33:13,354 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e51a8adaedf780ebc17d825bcf8567c6fe26dcb93621320dae5eec1509e5a5 [2022-07-13 16:33:13,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:33:13,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:33:13,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:33:13,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:33:13,607 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:33:13,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2022-07-13 16:33:13,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10763db14/6ce31f634d8748fd91ecb6ac9ba84f7d/FLAGe529ff1be [2022-07-13 16:33:14,020 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:33:14,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2022-07-13 16:33:14,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10763db14/6ce31f634d8748fd91ecb6ac9ba84f7d/FLAGe529ff1be [2022-07-13 16:33:14,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10763db14/6ce31f634d8748fd91ecb6ac9ba84f7d [2022-07-13 16:33:14,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:33:14,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:33:14,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:33:14,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:33:14,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:33:14,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd205ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14, skipping insertion in model container [2022-07-13 16:33:14,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:33:14,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:33:14,591 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-scaling/freire2_unwindbound2.c[709,722] [2022-07-13 16:33:14,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:33:14,614 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:33:14,621 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-scaling/freire2_unwindbound2.c[709,722] [2022-07-13 16:33:14,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:33:14,651 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:33:14,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14 WrapperNode [2022-07-13 16:33:14,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:33:14,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:33:14,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:33:14,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:33:14,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,687 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-07-13 16:33:14,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:33:14,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:33:14,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:33:14,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:33:14,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:33:14,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:33:14,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:33:14,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:33:14,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (1/1) ... [2022-07-13 16:33:14,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:33:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:33:14,750 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) [2022-07-13 16:33:14,770 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 [2022-07-13 16:33:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:33:14,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 16:33:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:33:14,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:33:14,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:33:14,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:33:14,832 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:33:14,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:33:16,725 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:33:16,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:33:16,743 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 16:33:16,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:16 BoogieIcfgContainer [2022-07-13 16:33:16,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:33:16,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:33:16,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:33:16,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:33:16,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:33:14" (1/3) ... [2022-07-13 16:33:16,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf40c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:33:16, skipping insertion in model container [2022-07-13 16:33:16,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:33:14" (2/3) ... [2022-07-13 16:33:16,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf40c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:33:16, skipping insertion in model container [2022-07-13 16:33:16,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:16" (3/3) ... [2022-07-13 16:33:16,750 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2022-07-13 16:33:16,758 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:33:16,775 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:33:16,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:33:16,828 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@358f5ffa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23df884c [2022-07-13 16:33:16,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:33:16,831 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) [2022-07-13 16:33:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 16:33:16,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:16,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:16,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-07-13 16:33:16,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 16:33:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906246604] [2022-07-13 16:33:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:16,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 16:33:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 16:33:16,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 16:33:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 16:33:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 16:33:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:33:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:17,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:33:17,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 16:33:17,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906246604] [2022-07-13 16:33:17,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906246604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:33:17,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:33:17,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:33:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434814531] [2022-07-13 16:33:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:33:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:33:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 16:33:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:33:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:33:17,037 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) [2022-07-13 16:33:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:33:17,059 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-07-13 16:33:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:33:17,061 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 [2022-07-13 16:33:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:33:17,065 INFO L225 Difference]: With dead ends: 40 [2022-07-13 16:33:17,066 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 16:33:17,069 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 [2022-07-13 16:33:17,071 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 [2022-07-13 16:33:17,072 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] [2022-07-13 16:33:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 16:33:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 16:33:17,102 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) [2022-07-13 16:33:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-07-13 16:33:17,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-07-13 16:33:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:33:17,105 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-07-13 16:33:17,105 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) [2022-07-13 16:33:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-07-13 16:33:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:33:17,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:17,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:17,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:33:17,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 16:33:17,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-07-13 16:33:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 16:33:17,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298517581] [2022-07-13 16:33:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:17,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 16:33:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 16:33:17,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 16:33:17,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 16:33:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:33:17,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:33:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:17,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:33:17,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 16:33:17,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298517581] [2022-07-13 16:33:17,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298517581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:33:17,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:33:17,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:33:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078790641] [2022-07-13 16:33:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:33:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:33:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 16:33:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:33:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:33:17,450 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) [2022-07-13 16:33:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:33:17,472 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-07-13 16:33:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:33:17,473 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 [2022-07-13 16:33:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:33:17,473 INFO L225 Difference]: With dead ends: 28 [2022-07-13 16:33:17,473 INFO L226 Difference]: Without dead ends: 19 [2022-07-13 16:33:17,474 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 [2022-07-13 16:33:17,475 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 [2022-07-13 16:33:17,475 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] [2022-07-13 16:33:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-13 16:33:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-13 16:33:17,478 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) [2022-07-13 16:33:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-07-13 16:33:17,479 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-07-13 16:33:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:33:17,480 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-07-13 16:33:17,480 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) [2022-07-13 16:33:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-07-13 16:33:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:33:17,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:17,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:33:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 16:33:17,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-07-13 16:33:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 16:33:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017086474] [2022-07-13 16:33:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 16:33:17,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 16:33:17,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 16:33:17,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 16:33:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 16:33:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:33:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:17,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:33:17,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 16:33:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017086474] [2022-07-13 16:33:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017086474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:33:17,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:33:17,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:33:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241866041] [2022-07-13 16:33:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:33:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:33:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 16:33:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:33:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:33:17,919 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) [2022-07-13 16:33:20,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:22,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:24,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:26,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:29,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:31,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:33,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:33:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:33:33,847 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-07-13 16:33:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:33:33,970 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 [2022-07-13 16:33:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:33:33,971 INFO L225 Difference]: With dead ends: 33 [2022-07-13 16:33:33,971 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 16:33:33,972 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 [2022-07-13 16:33:33,973 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 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, 15.9s IncrementalHoareTripleChecker+Time [2022-07-13 16:33:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 15.9s Time] [2022-07-13 16:33:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 16:33:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-13 16:33:33,978 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) [2022-07-13 16:33:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-13 16:33:33,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2022-07-13 16:33:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:33:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-13 16:33:33,979 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) [2022-07-13 16:33:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-13 16:33:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 16:33:33,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:33:33,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:33:33,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:33:34,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 16:33:34,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:33:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:33:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-07-13 16:33:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 16:33:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126114403] [2022-07-13 16:33:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:33:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 16:33:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 16:33:34,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 16:33:34,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 16:33:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:33:34,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 16:33:34,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:33:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:33:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:33:43,609 WARN L833 $PredicateComparison]: unable to prove that (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2022-07-13 16:33:45,648 WARN L855 $PredicateComparison]: unable to prove that (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2022-07-13 16:34:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:34:09,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 16:34:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126114403] [2022-07-13 16:34:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126114403] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:34:09,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:34:09,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-07-13 16:34:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201034257] [2022-07-13 16:34:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:34:09,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:34:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 16:34:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:34:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=56, Unknown=2, NotChecked=14, Total=90 [2022-07-13 16:34:09,208 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:34:12,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:34:15,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:34:17,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 16:34:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:34:17,600 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-13 16:34:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:34:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-13 16:34:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:34:17,723 INFO L225 Difference]: With dead ends: 31 [2022-07-13 16:34:17,723 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 16:34:17,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2022-07-13 16:34:17,724 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-13 16:34:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 32 Unchecked, 7.7s Time] [2022-07-13 16:34:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 16:34:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-13 16:34:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-07-13 16:34:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-13 16:34:17,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2022-07-13 16:34:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:34:17,730 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-13 16:34:17,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:34:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-13 16:34:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 16:34:17,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:34:17,730 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:34:17,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:34:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 16:34:17,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:34:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:34:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2022-07-13 16:34:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 16:34:17,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947508551] [2022-07-13 16:34:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:34:17,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 16:34:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 16:34:17,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 16:34:17,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 16:34:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 16:34:19,389 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 16:34:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 16:34:21,354 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-13 16:34:21,355 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 16:34:21,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 16:34:21,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:34:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 16:34:21,559 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 16:34:21,562 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 16:34:21,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 04:34:21 BoogieIcfgContainer [2022-07-13 16:34:21,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 16:34:21,580 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 16:34:21,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 16:34:21,580 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 16:34:21,580 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:33:16" (3/4) ... [2022-07-13 16:34:21,581 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 16:34:21,606 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 16:34:21,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 16:34:21,607 INFO L158 Benchmark]: Toolchain (without parser) took 67148.07ms. Allocated memory was 48.2MB in the beginning and 73.4MB in the end (delta: 25.2MB). Free memory was 24.3MB in the beginning and 37.6MB in the end (delta: -13.3MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2022-07-13 16:34:21,607 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.8MB in the beginning and 30.8MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:34:21,611 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.13ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 24.1MB in the beginning and 43.4MB in the end (delta: -19.3MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2022-07-13 16:34:21,611 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.18ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:34:21,612 INFO L158 Benchmark]: Boogie Preprocessor took 36.19ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 40.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:34:21,612 INFO L158 Benchmark]: RCFGBuilder took 2019.31ms. Allocated memory is still 60.8MB. Free memory was 40.3MB in the beginning and 43.5MB in the end (delta: -3.2MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. [2022-07-13 16:34:21,613 INFO L158 Benchmark]: TraceAbstraction took 64833.45ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 43.0MB in the beginning and 39.7MB in the end (delta: 3.3MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2022-07-13 16:34:21,613 INFO L158 Benchmark]: Witness Printer took 26.47ms. Allocated memory is still 73.4MB. Free memory was 39.7MB in the beginning and 37.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:34:21,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.8MB in the beginning and 30.8MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.13ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 24.1MB in the beginning and 43.4MB in the end (delta: -19.3MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.18ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.19ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 40.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2019.31ms. Allocated memory is still 60.8MB. Free memory was 40.3MB in the beginning and 43.5MB in the end (delta: -3.2MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. * TraceAbstraction took 64833.45ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 43.0MB in the beginning and 39.7MB in the end (delta: 3.3MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. * Witness Printer took 26.47ms. Allocated memory is still 73.4MB. Free memory was 39.7MB in the beginning and 37.6MB in the end (delta: 2.1MB). 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 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a 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=0.02522786458333341, counter=0, r=1, s=3.25, x=0.02522786458333341] [L33] EXPR counter++ VAL [a=0.02522786458333341, counter=1, counter++=0, r=1, s=3.25, x=0.02522786458333341] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [a=0.02522786458333341, counter=1, r=1, s=3.25, x=0.02522786458333341] [L35] CALL __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [\old(cond)=1, counter=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [a=0.02522786458333341, counter=1, r=1, s=3.25, x=0.02522786458333341] [L36] CALL __VERIFIER_assert((int)(8*r*s - 24*a + 16*r - 12*s + 24*x - 3 == 0)) 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: 64.8s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 24.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 23.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 23.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 32 IncrementalHoareTripleChecker+Unchecked, 135 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37 IncrementalHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 87 mSDtfsCounter, 37 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=3, InterpolantAutomatonStates: 19, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 34.5s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 1 QuantifiedInterpolants, 309 SizeOfPredicates, 5 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 proved your program to be incorrect! [2022-07-13 16:34:21,776 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE