./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/ldv-regression/rule60_list2.i -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 ec34d681fc532ab8881c0bb28aeb7b8d0ef0df29d4602290c71f943db752a206 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 08:09:15,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 08:09:15,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 08:09:15,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 08:09:15,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 08:09:15,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 08:09:15,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 08:09:15,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 08:09:15,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 08:09:15,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 08:09:15,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 08:09:15,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 08:09:15,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 08:09:15,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 08:09:15,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 08:09:15,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 08:09:15,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 08:09:15,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 08:09:15,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 08:09:15,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 08:09:15,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 08:09:15,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 08:09:15,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 08:09:15,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 08:09:15,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 08:09:15,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 08:09:15,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 08:09:15,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 08:09:15,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 08:09:15,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 08:09:15,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 08:09:15,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 08:09:15,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 08:09:15,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 08:09:15,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 08:09:15,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 08:09:15,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 08:09:15,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 08:09:15,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 08:09:15,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 08:09:15,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 08:09:15,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 08:09:15,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 08:09:15,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 08:09:15,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 08:09:15,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 08:09:15,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 08:09:15,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 08:09:15,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 08:09:15,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 08:09:15,633 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 08:09:15,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 08:09:15,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 08:09:15,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 08:09:15,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 08:09:15,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 08:09:15,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 08:09:15,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 08:09:15,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 08:09:15,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 08:09:15,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:09:15,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 08:09:15,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 08:09:15,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 08:09:15,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 08:09:15,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 08:09:15,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 08:09:15,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 08:09:15,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 08:09:15,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 08:09:15,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec34d681fc532ab8881c0bb28aeb7b8d0ef0df29d4602290c71f943db752a206 [2021-12-17 08:09:15,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 08:09:15,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 08:09:15,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 08:09:15,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 08:09:15,873 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 08:09:15,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.i [2021-12-17 08:09:15,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa31c14b/467dc4c2802449a1af87fd66661063e5/FLAG07753cff5 [2021-12-17 08:09:16,342 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 08:09:16,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.i [2021-12-17 08:09:16,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa31c14b/467dc4c2802449a1af87fd66661063e5/FLAG07753cff5 [2021-12-17 08:09:16,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa31c14b/467dc4c2802449a1af87fd66661063e5 [2021-12-17 08:09:16,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 08:09:16,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 08:09:16,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 08:09:16,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 08:09:16,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 08:09:16,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:09:16" (1/1) ... [2021-12-17 08:09:16,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5f01ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:16, skipping insertion in model container [2021-12-17 08:09:16,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:09:16" (1/1) ... [2021-12-17 08:09:16,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 08:09:16,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 08:09:16,934 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/ldv-regression/rule60_list2.i[292,305] [2021-12-17 08:09:17,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:09:17,034 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 08:09:17,043 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/ldv-regression/rule60_list2.i[292,305] [2021-12-17 08:09:17,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:09:17,087 INFO L208 MainTranslator]: Completed translation [2021-12-17 08:09:17,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17 WrapperNode [2021-12-17 08:09:17,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 08:09:17,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 08:09:17,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 08:09:17,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 08:09:17,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,116 INFO L137 Inliner]: procedures = 126, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2021-12-17 08:09:17,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 08:09:17,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 08:09:17,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 08:09:17,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 08:09:17,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 08:09:17,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 08:09:17,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 08:09:17,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 08:09:17,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (1/1) ... [2021-12-17 08:09:17,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:09:17,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:17,188 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) [2021-12-17 08:09:17,195 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 [2021-12-17 08:09:17,217 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-12-17 08:09:17,217 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-12-17 08:09:17,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 08:09:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-17 08:09:17,218 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-17 08:09:17,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 08:09:17,219 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-12-17 08:09:17,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-12-17 08:09:17,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 08:09:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 08:09:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 08:09:17,285 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 08:09:17,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 08:09:17,398 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 08:09:17,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 08:09:17,403 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 08:09:17,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:09:17 BoogieIcfgContainer [2021-12-17 08:09:17,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 08:09:17,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 08:09:17,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 08:09:17,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 08:09:17,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:09:16" (1/3) ... [2021-12-17 08:09:17,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a36254f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:09:17, skipping insertion in model container [2021-12-17 08:09:17,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:09:17" (2/3) ... [2021-12-17 08:09:17,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a36254f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:09:17, skipping insertion in model container [2021-12-17 08:09:17,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:09:17" (3/3) ... [2021-12-17 08:09:17,434 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.i [2021-12-17 08:09:17,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 08:09:17,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 08:09:17,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 08:09:17,498 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 [2021-12-17 08:09:17,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 08:09:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 08:09:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 08:09:17,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:17,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:17,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 483918471, now seen corresponding path program 1 times [2021-12-17 08:09:17,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166215307] [2021-12-17 08:09:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:17,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:09:17,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166215307] [2021-12-17 08:09:17,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166215307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:09:17,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:09:17,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 08:09:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039086772] [2021-12-17 08:09:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:09:17,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 08:09:17,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:17,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 08:09:17,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 08:09:17,723 INFO L87 Difference]: Start difference. First operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:09:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:17,759 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-12-17 08:09:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 08:09:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 08:09:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:17,766 INFO L225 Difference]: With dead ends: 66 [2021-12-17 08:09:17,766 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 08:09:17,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 08:09:17,771 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:17,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 93 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:09:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 08:09:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 08:09:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 08:09:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-17 08:09:17,794 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2021-12-17 08:09:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:17,795 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-17 08:09:17,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:09:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-17 08:09:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 08:09:17,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:17,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:17,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 08:09:17,797 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1376776956, now seen corresponding path program 1 times [2021-12-17 08:09:17,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:17,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055345232] [2021-12-17 08:09:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:17,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:17,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:17,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:17,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:17,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055345232] [2021-12-17 08:09:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055345232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:17,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862478644] [2021-12-17 08:09:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:17,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:17,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:17,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:17,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 08:09:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 08:09:18,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:18,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862478644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:18,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:18,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-17 08:09:18,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497191014] [2021-12-17 08:09:18,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:18,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 08:09:18,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 08:09:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 08:09:18,311 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:09:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:18,372 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-17 08:09:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 08:09:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-17 08:09:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:18,374 INFO L225 Difference]: With dead ends: 51 [2021-12-17 08:09:18,375 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 08:09:18,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 08:09:18,376 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:18,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:09:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 08:09:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-17 08:09:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 08:09:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-17 08:09:18,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2021-12-17 08:09:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:18,383 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-17 08:09:18,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:09:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-17 08:09:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 08:09:18,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:18,384 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] [2021-12-17 08:09:18,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:18,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2100541890, now seen corresponding path program 1 times [2021-12-17 08:09:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907525123] [2021-12-17 08:09:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:18,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:18,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907525123] [2021-12-17 08:09:18,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907525123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:09:18,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:09:18,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 08:09:18,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965020413] [2021-12-17 08:09:18,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:09:18,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 08:09:18,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 08:09:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 08:09:18,738 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 08:09:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:18,838 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-17 08:09:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 08:09:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-17 08:09:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:18,839 INFO L225 Difference]: With dead ends: 49 [2021-12-17 08:09:18,839 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 08:09:18,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 08:09:18,840 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:18,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:09:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 08:09:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 08:09:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 08:09:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-17 08:09:18,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-12-17 08:09:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:18,844 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-17 08:09:18,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 08:09:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-17 08:09:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 08:09:18,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:18,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:18,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 08:09:18,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1493360828, now seen corresponding path program 1 times [2021-12-17 08:09:18,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048322600] [2021-12-17 08:09:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:18,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:18,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048322600] [2021-12-17 08:09:18,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048322600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741220820] [2021-12-17 08:09:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:18,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:18,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:18,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 08:09:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 08:09:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 08:09:19,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 08:09:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741220820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:09:19,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 08:09:19,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2021-12-17 08:09:19,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860337667] [2021-12-17 08:09:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:09:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 08:09:19,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 08:09:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-17 08:09:19,314 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:09:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:19,517 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-12-17 08:09:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 08:09:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-17 08:09:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:19,519 INFO L225 Difference]: With dead ends: 55 [2021-12-17 08:09:19,519 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 08:09:19,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-12-17 08:09:19,520 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:19,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 119 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 08:09:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 08:09:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-12-17 08:09:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 08:09:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-12-17 08:09:19,526 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2021-12-17 08:09:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:19,526 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-12-17 08:09:19,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:09:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-12-17 08:09:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 08:09:19,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:19,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:19,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 08:09:19,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1025994815, now seen corresponding path program 1 times [2021-12-17 08:09:19,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:19,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107859191] [2021-12-17 08:09:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:19,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 08:09:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:19,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107859191] [2021-12-17 08:09:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107859191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127171417] [2021-12-17 08:09:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:19,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:19,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 08:09:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:20,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 08:09:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:09:20,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:09:20,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127171417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:20,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:20,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2021-12-17 08:09:20,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985036806] [2021-12-17 08:09:20,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:20,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 08:09:20,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 08:09:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-12-17 08:09:20,294 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 08:09:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:20,677 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-12-17 08:09:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 08:09:20,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-12-17 08:09:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:20,678 INFO L225 Difference]: With dead ends: 55 [2021-12-17 08:09:20,678 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 08:09:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 08:09:20,680 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:20,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 113 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 08:09:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 08:09:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-17 08:09:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 08:09:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-17 08:09:20,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 33 [2021-12-17 08:09:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:20,685 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-17 08:09:20,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 08:09:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-17 08:09:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 08:09:20,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:20,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:20,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:20,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:20,897 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 216648189, now seen corresponding path program 1 times [2021-12-17 08:09:20,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:20,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856808441] [2021-12-17 08:09:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:20,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:21,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 08:09:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:21,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856808441] [2021-12-17 08:09:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856808441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588602299] [2021-12-17 08:09:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:21,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:21,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:21,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 08:09:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 08:09:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:09:21,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:09:21,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588602299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:21,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:21,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-12-17 08:09:21,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550536306] [2021-12-17 08:09:21,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:21,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 08:09:21,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 08:09:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 08:09:21,764 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 08:09:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:22,207 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-12-17 08:09:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 08:09:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2021-12-17 08:09:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:22,208 INFO L225 Difference]: With dead ends: 57 [2021-12-17 08:09:22,208 INFO L226 Difference]: Without dead ends: 54 [2021-12-17 08:09:22,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 08:09:22,209 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:22,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 94 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 08:09:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-17 08:09:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-12-17 08:09:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 08:09:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-17 08:09:22,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 33 [2021-12-17 08:09:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-17 08:09:22,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 08:09:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-17 08:09:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 08:09:22,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:22,215 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2021-12-17 08:09:22,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:22,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:22,429 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1230299368, now seen corresponding path program 1 times [2021-12-17 08:09:22,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:22,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846540949] [2021-12-17 08:09:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:22,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 08:09:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 08:09:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 08:09:22,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:22,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846540949] [2021-12-17 08:09:22,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846540949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:22,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790429673] [2021-12-17 08:09:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:22,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:22,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:22,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 08:09:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 08:09:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:22,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:22,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790429673] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:22,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:22,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 28 [2021-12-17 08:09:22,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28952922] [2021-12-17 08:09:22,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:22,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 08:09:22,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 08:09:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-12-17 08:09:22,997 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 08:09:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:23,491 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-12-17 08:09:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 08:09:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2021-12-17 08:09:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:23,494 INFO L225 Difference]: With dead ends: 64 [2021-12-17 08:09:23,494 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 08:09:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 08:09:23,512 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:23,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 156 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 08:09:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 08:09:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-12-17 08:09:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 08:09:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-17 08:09:23,537 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 43 [2021-12-17 08:09:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:23,538 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-17 08:09:23,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 08:09:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-17 08:09:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 08:09:23,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:23,539 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2021-12-17 08:09:23,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:23,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:23,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1289660566, now seen corresponding path program 1 times [2021-12-17 08:09:23,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160982559] [2021-12-17 08:09:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:23,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 08:09:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 08:09:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 08:09:23,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160982559] [2021-12-17 08:09:23,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160982559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036954275] [2021-12-17 08:09:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:23,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:23,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:23,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 08:09:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:23,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 08:09:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:24,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 08:09:24,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036954275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:24,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:24,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2021-12-17 08:09:24,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29933717] [2021-12-17 08:09:24,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:24,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 08:09:24,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 08:09:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-12-17 08:09:24,273 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 08:09:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:24,695 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-17 08:09:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 08:09:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-12-17 08:09:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:24,696 INFO L225 Difference]: With dead ends: 53 [2021-12-17 08:09:24,696 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 08:09:24,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 08:09:24,697 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:24,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 144 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 08:09:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 08:09:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-17 08:09:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 08:09:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-17 08:09:24,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 43 [2021-12-17 08:09:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:24,703 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-17 08:09:24,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 08:09:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-17 08:09:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 08:09:24,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:09:24,704 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2021-12-17 08:09:24,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:24,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:24,911 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:09:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:09:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -588595988, now seen corresponding path program 1 times [2021-12-17 08:09:24,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:09:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056047321] [2021-12-17 08:09:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:24,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:09:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 08:09:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 08:09:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 08:09:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 08:09:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 08:09:25,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:09:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056047321] [2021-12-17 08:09:25,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056047321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 08:09:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740862859] [2021-12-17 08:09:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:09:25,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:25,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:09:25,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 08:09:25,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 08:09:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:09:25,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 08:09:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 08:09:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 08:09:25,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 08:09:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 08:09:25,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740862859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 08:09:25,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 08:09:25,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 7] total 24 [2021-12-17 08:09:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123239845] [2021-12-17 08:09:25,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 08:09:25,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 08:09:25,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:09:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 08:09:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-12-17 08:09:25,546 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 08:09:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:09:25,798 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-17 08:09:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 08:09:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2021-12-17 08:09:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:09:25,798 INFO L225 Difference]: With dead ends: 44 [2021-12-17 08:09:25,798 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 08:09:25,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 08:09:25,799 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 08:09:25,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 86 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 08:09:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 08:09:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 08:09:25,800 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) [2021-12-17 08:09:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 08:09:25,800 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-12-17 08:09:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:09:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 08:09:25,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 08:09:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 08:09:25,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 08:09:25,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 08:09:25,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 08:09:26,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 08:09:26,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 08:09:26,320 INFO L858 garLoopResultBuilder]: For program point my_mallocFINAL(lines 528 530) no Hoare annotation was computed. [2021-12-17 08:09:26,320 INFO L854 garLoopResultBuilder]: At program point my_mallocENTRY(lines 528 530) the Hoare annotation is: (or (and (= ~guard_malloc_counter~0.base |old(~guard_malloc_counter~0.base)|) (= ~guard_malloc_counter~0.offset |old(~guard_malloc_counter~0.offset)|)) (not (= |my_malloc_#in~size#1| 8))) [2021-12-17 08:09:26,321 INFO L854 garLoopResultBuilder]: At program point L526(lines 520 527) the Hoare annotation is: (let ((.cse1 (not (= |my_malloc_#in~size#1| 8)))) (and (or (and (<= |my_malloc___getMemory_#res#1.base| 0) (<= 0 |my_malloc___getMemory_#res#1.offset|) (<= |my_malloc___getMemory_#res#1.offset| 0) (<= 0 |my_malloc___getMemory_#res#1.base|)) (not (<= |old(~guard_malloc_counter~0.offset)| 1)) (not (<= 0 |old(~guard_malloc_counter~0.offset)|)) (not (<= ~elem~0.offset 0)) (let ((.cse0 (+ |old(~guard_malloc_counter~0.offset)| 1))) (and (<= .cse0 ~guard_malloc_counter~0.offset) (<= |my_malloc___getMemory_#res#1.offset| .cse0) (<= ~guard_malloc_counter~0.offset |my_malloc___getMemory_#res#1.offset|))) .cse1) (or (= |my_malloc___getMemory_~size#1| 8) .cse1))) [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L524(lines 524 525) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L522(line 522) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L854 garLoopResultBuilder]: At program point L522-2(line 522) the Hoare annotation is: (not (= |my_malloc_#in~size#1| 8)) [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L522-3(line 522) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point my_mallocEXIT(lines 528 530) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L854 garLoopResultBuilder]: At program point list_addENTRY(lines 535 539) the Hoare annotation is: (let ((.cse0 (not (<= 1 ~guard_malloc_counter~0.offset))) (.cse1 (and (= ~elem~0.base |old(~elem~0.base)|) (= ~elem~0.offset |old(~elem~0.offset)|)))) (and (or .cse0 (not (<= (+ |list_add_#in~new.offset| 1) |old(~elem~0.offset)|)) .cse1) (or (not (<= (+ |old(~elem~0.offset)| 1) |list_add_#in~new.offset|)) .cse0 .cse1))) [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L537(lines 537 538) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L536(line 536) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L537-2(lines 535 539) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L854 garLoopResultBuilder]: At program point L536-2(line 536) the Hoare annotation is: (let ((.cse0 (not (<= 1 ~guard_malloc_counter~0.offset)))) (and (or .cse0 (not (<= (+ |list_add_#in~new.offset| 1) |old(~elem~0.offset)|))) (or (not (<= (+ |old(~elem~0.offset)| 1) |list_add_#in~new.offset|)) .cse0))) [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L536-3(line 536) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point list_addEXIT(lines 535 539) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L861 garLoopResultBuilder]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L858 garLoopResultBuilder]: For program point L541(lines 541 542) no Hoare annotation was computed. [2021-12-17 08:09:26,321 INFO L854 garLoopResultBuilder]: At program point L550(line 550) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~dev2~0#1.offset| 2) (<= 1 |ULTIMATE.start_main_~dev1~0#1.offset|) (<= (+ |ULTIMATE.start_main_~dev1~0#1.offset| 1) |ULTIMATE.start_main_~dev2~0#1.offset|) (<= |ULTIMATE.start_main_~dev1~0#1.offset| ~guard_malloc_counter~0.offset) (= ~elem~0.offset 0)) [2021-12-17 08:09:26,322 INFO L854 garLoopResultBuilder]: At program point L550-1(line 550) the Hoare annotation is: (let ((.cse0 (<= (+ |ULTIMATE.start_main_~dev1~0#1.offset| 1) |ULTIMATE.start_main_~dev2~0#1.offset|))) (or (and (<= 1 |ULTIMATE.start_main_~dev1~0#1.offset|) .cse0 (<= |ULTIMATE.start_main_~dev1~0#1.offset| ~guard_malloc_counter~0.offset) (= ~elem~0.offset 0)) (and (<= 1 ~guard_malloc_counter~0.offset) (= ~elem~0.offset |ULTIMATE.start_main_~dev2~0#1.offset|) (<= |ULTIMATE.start_main_~dev2~0#1.offset| 2) .cse0 (<= 2 |ULTIMATE.start_main_~dev2~0#1.offset|) (= |ULTIMATE.start_main_~dev2~0#1.base| ~elem~0.base)))) [2021-12-17 08:09:26,322 INFO L854 garLoopResultBuilder]: At program point L548(line 548) the Hoare annotation is: (or (and (= 0 |ULTIMATE.start_main_~dev1~0#1.offset|) (= 0 |ULTIMATE.start_main_~dev1~0#1.base|)) (and (<= ~guard_malloc_counter~0.offset 1) (<= 1 |ULTIMATE.start_main_~dev1~0#1.offset|) (<= |ULTIMATE.start_main_~dev1~0#1.offset| ~guard_malloc_counter~0.offset) (= ~elem~0.offset 0))) [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L548-1(line 548) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L540(lines 540 543) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L861 garLoopResultBuilder]: At program point L555(lines 545 556) the Hoare annotation is: true [2021-12-17 08:09:26,322 INFO L854 garLoopResultBuilder]: At program point L553(line 553) the Hoare annotation is: (let ((.cse0 (<= 1 ~guard_malloc_counter~0.offset)) (.cse1 (<= 2 |ULTIMATE.start_main_~dev2~0#1.offset|))) (or (and .cse0 (<= (+ ~elem~0.offset 1) |ULTIMATE.start_main_~dev2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~dev1~0#1.offset| 1) |ULTIMATE.start_main_~dev2~0#1.offset|) .cse1 (<= |ULTIMATE.start_main_~dev1~0#1.offset| ~guard_malloc_counter~0.offset)) (and (<= ~elem~0.offset 0) .cse0 .cse1))) [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L551(line 551) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L549(lines 549 554) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L549-1(lines 549 554) no Hoare annotation was computed. [2021-12-17 08:09:26,322 INFO L854 garLoopResultBuilder]: At program point L547(line 547) the Hoare annotation is: (and (= ~guard_malloc_counter~0.offset 0) (= ~elem~0.offset 0)) [2021-12-17 08:09:26,322 INFO L858 garLoopResultBuilder]: For program point L547-1(line 547) no Hoare annotation was computed. [2021-12-17 08:09:26,324 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:09:26,325 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 08:09:26,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:09:26 BoogieIcfgContainer [2021-12-17 08:09:26,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 08:09:26,339 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 08:09:26,339 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 08:09:26,339 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 08:09:26,339 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:09:17" (3/4) ... [2021-12-17 08:09:26,341 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 08:09:26,345 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure my_malloc [2021-12-17 08:09:26,345 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure list_add [2021-12-17 08:09:26,346 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __blast_assert [2021-12-17 08:09:26,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-17 08:09:26,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-12-17 08:09:26,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 08:09:26,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 08:09:26,363 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((\result <= 0 && 0 <= \result) && \result <= 0) && 0 <= \result) || !(\old(guard_malloc_counter) <= 1)) || !(0 <= \old(guard_malloc_counter))) || !(elem <= 0)) || ((\old(guard_malloc_counter) + 1 <= guard_malloc_counter && \result <= \old(guard_malloc_counter) + 1) && guard_malloc_counter <= \result)) || !(\old(size) == 8)) && (size == 8 || !(\old(size) == 8)) [2021-12-17 08:09:26,370 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 08:09:26,370 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 08:09:26,371 INFO L158 Benchmark]: Toolchain (without parser) took 9621.31ms. Allocated memory was 98.6MB in the beginning and 213.9MB in the end (delta: 115.3MB). Free memory was 68.0MB in the beginning and 141.7MB in the end (delta: -73.7MB). Peak memory consumption was 41.3MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,371 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory was 56.1MB in the beginning and 56.1MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:09:26,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.53ms. Allocated memory was 98.6MB in the beginning and 142.6MB in the end (delta: 44.0MB). Free memory was 67.8MB in the beginning and 111.3MB in the end (delta: -43.5MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.86ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 109.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,372 INFO L158 Benchmark]: Boogie Preprocessor took 14.15ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 108.4MB in the end (delta: 873.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,372 INFO L158 Benchmark]: RCFGBuilder took 272.95ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 97.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,372 INFO L158 Benchmark]: TraceAbstraction took 8923.24ms. Allocated memory was 142.6MB in the beginning and 213.9MB in the end (delta: 71.3MB). Free memory was 96.7MB in the beginning and 144.8MB in the end (delta: -48.2MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,373 INFO L158 Benchmark]: Witness Printer took 31.72ms. Allocated memory is still 213.9MB. Free memory was 144.8MB in the beginning and 141.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 08:09:26,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory was 56.1MB in the beginning and 56.1MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.53ms. Allocated memory was 98.6MB in the beginning and 142.6MB in the end (delta: 44.0MB). Free memory was 67.8MB in the beginning and 111.3MB in the end (delta: -43.5MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.86ms. Allocated memory is still 142.6MB. Free memory was 111.3MB in the beginning and 109.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.15ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 108.4MB in the end (delta: 873.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.95ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 97.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8923.24ms. Allocated memory was 142.6MB in the beginning and 213.9MB in the end (delta: 71.3MB). Free memory was 96.7MB in the beginning and 144.8MB in the end (delta: -48.2MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. * Witness Printer took 31.72ms. Allocated memory is still 213.9MB. Free memory was 144.8MB in the beginning and 141.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. 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: 6]: 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 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 449 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 448 mSDsluCounter, 1065 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 828 mSDsCounter, 219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3120 IncrementalHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 219 mSolverCounterUnsat, 237 mSDtfsCounter, 3120 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 685 GetRequests, 438 SyntacticMatches, 10 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 62 PreInvPairs, 77 NumberOfFragments, 245 HoareAnnotationTreeSize, 62 FomulaSimplifications, 96 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2260 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 726 ConstructedInterpolants, 0 QuantifiedInterpolants, 2765 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 151/249 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 545]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 520]: Loop Invariant Derived loop invariant: ((((((((\result <= 0 && 0 <= \result) && \result <= 0) && 0 <= \result) || !(\old(guard_malloc_counter) <= 1)) || !(0 <= \old(guard_malloc_counter))) || !(elem <= 0)) || ((\old(guard_malloc_counter) + 1 <= guard_malloc_counter && \result <= \old(guard_malloc_counter) + 1) && guard_malloc_counter <= \result)) || !(\old(size) == 8)) && (size == 8 || !(\old(size) == 8)) RESULT: Ultimate proved your program to be correct! [2021-12-17 08:09:26,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE