./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/verifythis/elimination_max.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 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:26:06,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:26:06,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:26:06,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:26:06,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:26:06,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:26:06,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:26:06,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:26:06,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:26:06,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:26:06,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:26:06,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:26:06,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:26:06,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:26:06,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:26:06,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:26:06,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:26:06,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:26:06,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:26:06,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:26:06,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:26:06,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:26:06,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:26:06,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:26:06,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:26:06,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:26:06,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:26:06,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:26:06,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:26:06,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:26:06,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:26:06,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:26:06,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:26:06,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:26:06,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:26:06,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:26:06,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:26:06,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:26:06,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:26:06,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:26:06,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:26:06,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:26:06,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:26:06,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:26:06,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:26:06,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:26:06,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:26:06,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:26:06,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:26:06,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:26:06,249 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:26:06,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:26:06,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:26:06,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:26:06,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:26:06,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:26:06,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:26:06,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:26:06,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:26:06,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:26:06,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:06,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:26:06,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:26:06,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:26:06,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2021-12-21 12:26:06,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:26:06,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:26:06,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:26:06,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:26:06,429 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:26:06,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2021-12-21 12:26:06,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3462892e4/e1c9451a57c34de7937422e7f579a02b/FLAGd403dc711 [2021-12-21 12:26:06,824 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:26:06,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2021-12-21 12:26:06,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3462892e4/e1c9451a57c34de7937422e7f579a02b/FLAGd403dc711 [2021-12-21 12:26:07,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3462892e4/e1c9451a57c34de7937422e7f579a02b [2021-12-21 12:26:07,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:26:07,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:26:07,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:07,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:26:07,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:26:07,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126d2cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07, skipping insertion in model container [2021-12-21 12:26:07,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:26:07,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:26:07,381 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/verifythis/elimination_max.c[485,498] [2021-12-21 12:26:07,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:07,400 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:26:07,409 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/verifythis/elimination_max.c[485,498] [2021-12-21 12:26:07,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:07,422 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:26:07,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07 WrapperNode [2021-12-21 12:26:07,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:07,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:07,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:26:07,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:26:07,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,449 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-12-21 12:26:07,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:07,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:26:07,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:26:07,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:26:07,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:26:07,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:26:07,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:26:07,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:26:07,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (1/1) ... [2021-12-21 12:26:07,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:26:07,507 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) [2021-12-21 12:26:07,519 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 [2021-12-21 12:26:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:26:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:26:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:26:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:26:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 12:26:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:26:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:26:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:26:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:26:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:26:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 12:26:07,612 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:26:07,613 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:26:07,759 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:26:07,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:26:07,763 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:26:07,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:07 BoogieIcfgContainer [2021-12-21 12:26:07,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:26:07,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:26:07,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:26:07,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:26:07,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:26:07" (1/3) ... [2021-12-21 12:26:07,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e6855f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:07, skipping insertion in model container [2021-12-21 12:26:07,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:07" (2/3) ... [2021-12-21 12:26:07,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e6855f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:07, skipping insertion in model container [2021-12-21 12:26:07,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:07" (3/3) ... [2021-12-21 12:26:07,783 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-12-21 12:26:07,786 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:26:07,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:26:07,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:26:07,832 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:26:07,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:26:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:26:07,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:07,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:07,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2021-12-21 12:26:07,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:26:07,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176733384] [2021-12-21 12:26:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:26:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:26:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:26:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:08,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:26:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176733384] [2021-12-21 12:26:08,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176733384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:08,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:08,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:26:08,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149006266] [2021-12-21 12:26:08,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:08,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:26:08,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:26:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:26:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:08,038 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:08,054 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-12-21 12:26:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:26:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-21 12:26:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:08,062 INFO L225 Difference]: With dead ends: 57 [2021-12-21 12:26:08,062 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 12:26:08,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:08,068 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-21 12:26:08,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 12:26:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-21 12:26:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 12:26:08,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-12-21 12:26:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:08,090 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 12:26:08,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 12:26:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:26:08,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:08,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:08,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:26:08,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2021-12-21 12:26:08,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:26:08,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532466122] [2021-12-21 12:26:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:08,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:26:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:26:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:26:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:26:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532466122] [2021-12-21 12:26:08,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532466122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:08,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 12:26:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529171359] [2021-12-21 12:26:08,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:08,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:26:08,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:26:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:26:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:26:08,224 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:08,312 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-21 12:26:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:26:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-21 12:26:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:08,314 INFO L225 Difference]: With dead ends: 32 [2021-12-21 12:26:08,314 INFO L226 Difference]: Without dead ends: 30 [2021-12-21 12:26:08,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:26:08,315 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 103 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:26:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-21 12:26:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-21 12:26:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-21 12:26:08,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2021-12-21 12:26:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:08,321 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-21 12:26:08,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-21 12:26:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:26:08,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:08,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:26:08,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2021-12-21 12:26:08,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:26:08,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045883461] [2021-12-21 12:26:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:08,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:26:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:26:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:26:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 12:26:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:08,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:26:08,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045883461] [2021-12-21 12:26:08,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045883461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:08,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:08,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:26:08,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359372187] [2021-12-21 12:26:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:08,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:26:08,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:26:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:26:08,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:26:08,428 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:26:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:08,508 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-21 12:26:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:26:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-12-21 12:26:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:08,509 INFO L225 Difference]: With dead ends: 30 [2021-12-21 12:26:08,509 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 12:26:08,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:26:08,510 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:08,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 117 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 12:26:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 12:26:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:26:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 12:26:08,512 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-12-21 12:26:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:08,512 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 12:26:08,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:26:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 12:26:08,513 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 12:26:08,514 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:26:08,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:26:08,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 12:26:08,566 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 25 37) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point L25-2(lines 25 37) no Hoare annotation was computed. [2021-12-21 12:26:08,567 INFO L861 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: true [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-12-21 12:26:08,567 INFO L861 garLoopResultBuilder]: At program point L50(lines 16 51) the Hoare annotation is: true [2021-12-21 12:26:08,567 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= 0 |ULTIMATE.start_main_#t~mem16#1|) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem15#1| 0))) [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point L46-1(line 46) no Hoare annotation was computed. [2021-12-21 12:26:08,567 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2021-12-21 12:26:08,567 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0)) (.cse1 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse0 .cse1) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)) (= |ULTIMATE.start_main_#t~mem12#1| 0) (= (select .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|))) [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L43-1(line 43) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L854 garLoopResultBuilder]: At program point L45-3(lines 45 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc6#1.base|)))) [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L45-4(lines 45 47) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 36) no Hoare annotation was computed. [2021-12-21 12:26:08,568 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-21 12:26:08,568 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point L11-3(lines 10 12) no Hoare annotation was computed. [2021-12-21 12:26:08,569 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-12-21 12:26:08,574 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-21 12:26:08,575 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:26:08,595 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-21 12:26:08,600 INFO L158 Benchmark]: Toolchain (without parser) took 1346.83ms. Allocated memory is still 111.1MB. Free memory was 82.7MB in the beginning and 62.6MB in the end (delta: 20.1MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,603 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 81.8MB. Free memory was 39.3MB in the beginning and 39.2MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:26:08,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.52ms. Allocated memory is still 111.1MB. Free memory was 82.7MB in the beginning and 88.2MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,603 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.35ms. Allocated memory is still 111.1MB. Free memory was 88.2MB in the beginning and 86.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,604 INFO L158 Benchmark]: Boogie Preprocessor took 15.22ms. Allocated memory is still 111.1MB. Free memory was 86.4MB in the beginning and 85.5MB in the end (delta: 849.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,605 INFO L158 Benchmark]: RCFGBuilder took 298.42ms. Allocated memory is still 111.1MB. Free memory was 85.5MB in the beginning and 74.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,606 INFO L158 Benchmark]: TraceAbstraction took 834.09ms. Allocated memory is still 111.1MB. Free memory was 73.9MB in the beginning and 62.6MB in the end (delta: 11.3MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-12-21 12:26:08,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 81.8MB. Free memory was 39.3MB in the beginning and 39.2MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.52ms. Allocated memory is still 111.1MB. Free memory was 82.7MB in the beginning and 88.2MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.35ms. Allocated memory is still 111.1MB. Free memory was 88.2MB in the beginning and 86.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.22ms. Allocated memory is still 111.1MB. Free memory was 86.4MB in the beginning and 85.5MB in the end (delta: 849.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 298.42ms. Allocated memory is still 111.1MB. Free memory was 85.5MB in the beginning and 74.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 834.09ms. Allocated memory is still 111.1MB. Free memory was 73.9MB in the beginning and 62.6MB in the end (delta: 11.3MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 254 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 173 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 81 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 89 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 219 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-21 12:26:08,639 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/verifythis/elimination_max.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 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:26:10,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:26:10,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:26:10,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:26:10,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:26:10,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:26:10,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:26:10,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:26:10,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:26:10,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:26:10,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:26:10,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:26:10,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:26:10,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:26:10,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:26:10,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:26:10,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:26:10,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:26:10,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:26:10,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:26:10,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:26:10,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:26:10,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:26:10,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:26:10,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:26:10,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:26:10,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:26:10,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:26:10,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:26:10,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:26:10,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:26:10,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:26:10,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:26:10,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:26:10,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:26:10,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:26:10,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:26:10,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:26:10,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:26:10,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:26:10,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:26:10,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 12:26:10,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:26:10,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:26:10,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:26:10,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:26:10,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:26:10,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:26:10,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:26:10,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:26:10,520 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:26:10,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:26:10,521 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:26:10,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:26:10,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:10,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:26:10,523 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:26:10,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 12:26:10,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bc7b1b837bfd7794f122f6504da8d835bb2276ae4afe0cc0d058d385032d49e [2021-12-21 12:26:10,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:26:10,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:26:10,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:26:10,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:26:10,829 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:26:10,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2021-12-21 12:26:10,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04c867ac/8bef2a75fa214282abbd39367497f642/FLAG407928667 [2021-12-21 12:26:11,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:26:11,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2021-12-21 12:26:11,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04c867ac/8bef2a75fa214282abbd39367497f642/FLAG407928667 [2021-12-21 12:26:11,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04c867ac/8bef2a75fa214282abbd39367497f642 [2021-12-21 12:26:11,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:26:11,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:26:11,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:11,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:26:11,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:26:11,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ef853d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11, skipping insertion in model container [2021-12-21 12:26:11,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:26:11,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:26:11,793 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/verifythis/elimination_max.c[485,498] [2021-12-21 12:26:11,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:11,810 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:26:11,848 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/verifythis/elimination_max.c[485,498] [2021-12-21 12:26:11,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:11,892 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:26:11,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11 WrapperNode [2021-12-21 12:26:11,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:11,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:11,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:26:11,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:26:11,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,937 INFO L137 Inliner]: procedures = 20, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-12-21 12:26:11,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:11,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:26:11,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:26:11,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:26:11,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:26:11,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:26:11,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:26:11,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:26:11,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (1/1) ... [2021-12-21 12:26:11,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:26:12,001 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) [2021-12-21 12:26:12,044 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 [2021-12-21 12:26:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:26:12,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 12:26:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:26:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:26:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 12:26:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 12:26:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:26:12,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:26:12,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:26:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:26:12,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 12:26:12,131 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:26:12,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:26:12,327 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:26:12,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:26:12,331 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:26:12,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:12 BoogieIcfgContainer [2021-12-21 12:26:12,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:26:12,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:26:12,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:26:12,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:26:12,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:26:11" (1/3) ... [2021-12-21 12:26:12,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe549a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:12, skipping insertion in model container [2021-12-21 12:26:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:11" (2/3) ... [2021-12-21 12:26:12,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe549a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:12, skipping insertion in model container [2021-12-21 12:26:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:12" (3/3) ... [2021-12-21 12:26:12,362 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-12-21 12:26:12,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:26:12,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:26:12,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:26:12,427 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:26:12,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:26:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:26:12,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:12,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:12,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 434333419, now seen corresponding path program 1 times [2021-12-21 12:26:12,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:12,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733629756] [2021-12-21 12:26:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:12,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:12,463 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) [2021-12-21 12:26:12,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 12:26:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:26:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:26:12,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:26:12,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733629756] [2021-12-21 12:26:12,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733629756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:12,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:26:12,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77665984] [2021-12-21 12:26:12,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:12,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:26:12,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:26:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:12,635 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:12,652 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-12-21 12:26:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:26:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-21 12:26:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:12,658 INFO L225 Difference]: With dead ends: 57 [2021-12-21 12:26:12,658 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 12:26:12,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:12,663 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-21 12:26:12,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 12:26:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-21 12:26:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 12:26:12,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-12-21 12:26:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:12,700 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 12:26:12,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 12:26:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:26:12,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:12,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:12,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:26:12,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:12,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1040778997, now seen corresponding path program 1 times [2021-12-21 12:26:12,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560590120] [2021-12-21 12:26:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:12,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:12,916 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) [2021-12-21 12:26:12,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 12:26:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 12:26:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:26:13,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:26:13,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-21 12:26:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:13,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:26:13,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:13,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560590120] [2021-12-21 12:26:13,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560590120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:13,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 12:26:13,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578295194] [2021-12-21 12:26:13,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 12:26:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 12:26:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:26:13,384 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:13,638 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-12-21 12:26:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:26:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-21 12:26:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:13,640 INFO L225 Difference]: With dead ends: 39 [2021-12-21 12:26:13,640 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 12:26:13,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:26:13,642 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:13,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 159 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-21 12:26:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 12:26:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-21 12:26:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:26:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-21 12:26:13,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2021-12-21 12:26:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:13,648 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-21 12:26:13,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-21 12:26:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 12:26:13,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:13,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:13,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:26:13,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:13,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash 953578392, now seen corresponding path program 1 times [2021-12-21 12:26:13,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:13,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679802598] [2021-12-21 12:26:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:13,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:13,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:13,858 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) [2021-12-21 12:26:13,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 12:26:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 12:26:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:14,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:26:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:26:14,533 INFO L353 Elim1Store]: treesize reduction 10, result has 73.7 percent of original size [2021-12-21 12:26:14,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 37 [2021-12-21 12:26:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:26:14,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:26:14,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679802598] [2021-12-21 12:26:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679802598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:26:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773685964] [2021-12-21 12:26:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:14,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 12:26:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 12:26:14,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 12:26:14,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-12-21 12:26:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:26:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:15,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-21 12:26:18,861 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2|))) is different from true [2021-12-21 12:26:19,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-12-21 12:26:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:26:19,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:26:19,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1773685964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:19,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:26:19,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 21 [2021-12-21 12:26:19,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763280169] [2021-12-21 12:26:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:19,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:26:19,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:26:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=487, Unknown=1, NotChecked=44, Total=600 [2021-12-21 12:26:19,605 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:19,682 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-21 12:26:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:26:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-21 12:26:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:19,684 INFO L225 Difference]: With dead ends: 45 [2021-12-21 12:26:19,684 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 12:26:19,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=89, Invalid=616, Unknown=1, NotChecked=50, Total=756 [2021-12-21 12:26:19,685 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:19,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2021-12-21 12:26:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 12:26:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-12-21 12:26:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:26:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-12-21 12:26:19,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2021-12-21 12:26:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:19,689 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-12-21 12:26:19,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-12-21 12:26:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:26:19,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:19,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:19,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:26:19,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-21 12:26:20,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:20,093 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1270583733, now seen corresponding path program 1 times [2021-12-21 12:26:20,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:20,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312494919] [2021-12-21 12:26:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:20,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:20,105 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) [2021-12-21 12:26:20,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 12:26:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:26:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:20,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 12:26:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:20,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:26:20,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312494919] [2021-12-21 12:26:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312494919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:20,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 12:26:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944174343] [2021-12-21 12:26:20,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:26:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:20,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:26:20,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:26:20,249 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 12:26:20,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:20,312 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-12-21 12:26:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:26:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-12-21 12:26:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:20,316 INFO L225 Difference]: With dead ends: 55 [2021-12-21 12:26:20,316 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 12:26:20,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:26:20,317 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:20,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 147 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 12:26:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-12-21 12:26:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 12:26:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-21 12:26:20,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2021-12-21 12:26:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:20,325 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-21 12:26:20,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 12:26:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-21 12:26:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:26:20,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:20,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:20,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:26:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:20,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1943727032, now seen corresponding path program 1 times [2021-12-21 12:26:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684189971] [2021-12-21 12:26:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:20,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:20,530 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:26:20,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 12:26:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 12:26:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:21,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:26:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:26:21,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:26:21,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2021-12-21 12:26:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:26:21,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:26:21,739 INFO L353 Elim1Store]: treesize reduction 71, result has 19.3 percent of original size [2021-12-21 12:26:21,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 24 [2021-12-21 12:26:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:26:21,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684189971] [2021-12-21 12:26:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684189971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:26:21,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:26:21,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-12-21 12:26:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142966989] [2021-12-21 12:26:21,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:26:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 12:26:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 12:26:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-12-21 12:26:21,839 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 12:26:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:23,435 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-12-21 12:26:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 12:26:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2021-12-21 12:26:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:23,437 INFO L225 Difference]: With dead ends: 93 [2021-12-21 12:26:23,437 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 12:26:23,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 12:26:23,438 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 99 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:23,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 410 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 333 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2021-12-21 12:26:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 12:26:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-12-21 12:26:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 12:26:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-12-21 12:26:23,449 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 30 [2021-12-21 12:26:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:23,449 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-12-21 12:26:23,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 12:26:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-12-21 12:26:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 12:26:23,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:23,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:23,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-21 12:26:23,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:23,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1112024125, now seen corresponding path program 1 times [2021-12-21 12:26:23,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052618678] [2021-12-21 12:26:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:23,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:23,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:23,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:26:23,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 12:26:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:26:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:27:00,609 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 12:27:06,964 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 12:27:11,266 INFO L353 Elim1Store]: treesize reduction 64, result has 94.2 percent of original size [2021-12-21 12:27:11,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 159 treesize of output 1067