./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/alt_test.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/alt_test.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 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 08:08:55,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 08:08:55,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 08:08:56,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 08:08:56,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 08:08:56,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 08:08:56,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 08:08:56,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 08:08:56,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 08:08:56,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 08:08:56,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 08:08:56,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 08:08:56,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 08:08:56,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 08:08:56,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 08:08:56,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 08:08:56,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 08:08:56,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 08:08:56,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 08:08:56,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 08:08:56,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 08:08:56,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 08:08:56,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 08:08:56,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 08:08:56,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 08:08:56,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 08:08:56,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 08:08:56,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 08:08:56,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 08:08:56,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 08:08:56,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 08:08:56,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 08:08:56,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 08:08:56,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 08:08:56,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 08:08:56,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 08:08:56,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 08:08:56,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 08:08:56,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 08:08:56,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 08:08:56,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 08:08:56,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 08:08:56,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 08:08:56,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 08:08:56,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 08:08:56,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 08:08:56,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 08:08:56,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 08:08:56,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 08:08:56,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 08:08:56,138 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 08:08:56,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 08:08:56,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 08:08:56,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 08:08:56,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 08:08:56,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 08:08:56,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 08:08:56,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 08:08:56,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 08:08:56,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 08:08:56,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 08:08:56,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:08:56,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 08:08:56,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 08:08:56,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 08:08:56,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 08:08:56,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 08:08:56,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 08:08:56,144 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 08:08:56,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 08:08:56,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 08:08:56,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bafd9f9c248bc8b929fd553117dceb5cafdbf12cfc108f50311933c849ac186 [2021-12-17 08:08:56,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 08:08:56,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 08:08:56,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 08:08:56,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 08:08:56,415 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 08:08:56,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alt_test.i [2021-12-17 08:08:56,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4333147e3/ef1e8ebebc7b4577940b5394b70ea24c/FLAGa4a918749 [2021-12-17 08:08:56,966 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 08:08:56,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i [2021-12-17 08:08:56,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4333147e3/ef1e8ebebc7b4577940b5394b70ea24c/FLAGa4a918749 [2021-12-17 08:08:57,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4333147e3/ef1e8ebebc7b4577940b5394b70ea24c [2021-12-17 08:08:57,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 08:08:57,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 08:08:57,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 08:08:57,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 08:08:57,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 08:08:57,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790ff53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57, skipping insertion in model container [2021-12-17 08:08:57,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 08:08:57,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 08:08:57,560 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/alt_test.i[22285,22298] [2021-12-17 08:08:57,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:08:57,573 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 08:08:57,603 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/alt_test.i[22285,22298] [2021-12-17 08:08:57,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 08:08:57,633 INFO L208 MainTranslator]: Completed translation [2021-12-17 08:08:57,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57 WrapperNode [2021-12-17 08:08:57,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 08:08:57,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 08:08:57,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 08:08:57,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 08:08:57,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,664 INFO L137 Inliner]: procedures = 121, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2021-12-17 08:08:57,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 08:08:57,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 08:08:57,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 08:08:57,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 08:08:57,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 08:08:57,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 08:08:57,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 08:08:57,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 08:08:57,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (1/1) ... [2021-12-17 08:08:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 08:08:57,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 08:08:57,713 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 08:08:57,723 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 08:08:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 08:08:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 08:08:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 08:08:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2021-12-17 08:08:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2021-12-17 08:08:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 08:08:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 08:08:57,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 08:08:57,879 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 08:08:57,885 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 08:08:58,009 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 08:08:58,014 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 08:08:58,014 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 08:08:58,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:08:58 BoogieIcfgContainer [2021-12-17 08:08:58,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 08:08:58,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 08:08:58,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 08:08:58,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 08:08:58,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:08:57" (1/3) ... [2021-12-17 08:08:58,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f49af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:08:58, skipping insertion in model container [2021-12-17 08:08:58,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:08:57" (2/3) ... [2021-12-17 08:08:58,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f49af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:08:58, skipping insertion in model container [2021-12-17 08:08:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:08:58" (3/3) ... [2021-12-17 08:08:58,037 INFO L111 eAbstractionObserver]: Analyzing ICFG alt_test.i [2021-12-17 08:08:58,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 08:08:58,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 08:08:58,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 08:08:58,120 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 08:08:58,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 08:08:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:08:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 08:08:58,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:08:58,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:08:58,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:08:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:08:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1030557677, now seen corresponding path program 1 times [2021-12-17 08:08:58,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:08:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305922925] [2021-12-17 08:08:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:08:58,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:08:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:08:58,370 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 08:08:58,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:08:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305922925] [2021-12-17 08:08:58,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305922925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:08:58,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:08:58,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 08:08:58,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924104301] [2021-12-17 08:08:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:08:58,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 08:08:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:08:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 08:08:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 08:08:58,408 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:08:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:08:58,444 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-12-17 08:08:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 08:08:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 08:08:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:08:58,454 INFO L225 Difference]: With dead ends: 40 [2021-12-17 08:08:58,454 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 08:08:58,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 08:08:58,462 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:08:58,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:08:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 08:08:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-17 08:08:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 08:08:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-17 08:08:58,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2021-12-17 08:08:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:08:58,517 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-17 08:08:58,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:08:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-17 08:08:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 08:08:58,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:08:58,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:08:58,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 08:08:58,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:08:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:08:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1839904303, now seen corresponding path program 1 times [2021-12-17 08:08:58,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:08:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389104206] [2021-12-17 08:08:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:08:58,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:08:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:08:58,583 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 08:08:58,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:08:58,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389104206] [2021-12-17 08:08:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389104206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:08:58,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:08:58,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 08:08:58,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487325010] [2021-12-17 08:08:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:08:58,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 08:08:58,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:08:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 08:08:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 08:08:58,589 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:08:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:08:58,596 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-17 08:08:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 08:08:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 08:08:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:08:58,599 INFO L225 Difference]: With dead ends: 30 [2021-12-17 08:08:58,599 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 08:08:58,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 08:08:58,602 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:08:58,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:08:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 08:08:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 08:08:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 08:08:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-12-17 08:08:58,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2021-12-17 08:08:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:08:58,613 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-12-17 08:08:58,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 08:08:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-12-17 08:08:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 08:08:58,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:08:58,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:08:58,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 08:08:58,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:08:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:08:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1999403131, now seen corresponding path program 1 times [2021-12-17 08:08:58,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:08:58,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103931725] [2021-12-17 08:08:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:08:58,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:08:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:08:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 08:08:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 08:08:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 08:08:58,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 08:08:58,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103931725] [2021-12-17 08:08:58,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103931725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 08:08:58,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 08:08:58,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 08:08:58,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258681669] [2021-12-17 08:08:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 08:08:58,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 08:08:58,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 08:08:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 08:08:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 08:08:58,748 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 08:08:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 08:08:58,848 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-17 08:08:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 08:08:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 08:08:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 08:08:58,849 INFO L225 Difference]: With dead ends: 30 [2021-12-17 08:08:58,849 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 08:08:58,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-17 08:08:58,856 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 08:08:58,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 08:08:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 08:08:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 08:08:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 08:08:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-12-17 08:08:58,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-12-17 08:08:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 08:08:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-12-17 08:08:58,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 08:08:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-12-17 08:08:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 08:08:58,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 08:08:58,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 08:08:58,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 08:08:58,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 08:08:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 08:08:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1387459588, now seen corresponding path program 1 times [2021-12-17 08:08:58,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 08:08:58,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671051284] [2021-12-17 08:08:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 08:08:58,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 08:08:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 08:08:58,879 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 08:08:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 08:08:58,921 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 08:08:58,921 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 08:08:58,922 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location l_freeErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 08:08:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 08:08:58,927 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-17 08:08:58,932 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 08:08:58,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 08:08:58 BoogieIcfgContainer [2021-12-17 08:08:58,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 08:08:58,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 08:08:58,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 08:08:58,966 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 08:08:58,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:08:58" (3/4) ... [2021-12-17 08:08:58,970 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 08:08:59,002 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 08:08:59,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 08:08:59,003 INFO L158 Benchmark]: Toolchain (without parser) took 1712.13ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 73.0MB in the beginning and 87.7MB in the end (delta: -14.8MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,003 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory is still 56.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:08:59,004 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.00ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 72.7MB in the beginning and 106.3MB in the end (delta: -33.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,004 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.63ms. Allocated memory is still 136.3MB. Free memory was 106.3MB in the beginning and 104.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,004 INFO L158 Benchmark]: Boogie Preprocessor took 22.96ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 103.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 08:08:59,005 INFO L158 Benchmark]: RCFGBuilder took 325.85ms. Allocated memory is still 136.3MB. Free memory was 103.4MB in the beginning and 94.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,005 INFO L158 Benchmark]: TraceAbstraction took 947.38ms. Allocated memory is still 136.3MB. Free memory was 93.7MB in the beginning and 89.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,005 INFO L158 Benchmark]: Witness Printer took 37.22ms. Allocated memory is still 136.3MB. Free memory was 89.8MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 08:08:59,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory is still 56.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.00ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 72.7MB in the beginning and 106.3MB in the end (delta: -33.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.63ms. Allocated memory is still 136.3MB. Free memory was 106.3MB in the beginning and 104.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.96ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 103.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 325.85ms. Allocated memory is still 136.3MB. Free memory was 103.4MB in the beginning and 94.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 947.38ms. Allocated memory is still 136.3MB. Free memory was 93.7MB in the beginning and 89.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Witness Printer took 37.22ms. Allocated memory is still 136.3MB. Free memory was 89.8MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [globalState=0] [L523] CALL, EXPR l_malloc(sizeof(int)) [L529] void *retVal = malloc(size); [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 VAL [\old(size)=4, globalState=1, retVal={-1:0}, size=4] [L532] return retVal; VAL [\old(size)=4, \result={-1:0}, globalState=1, retVal={-1:0}, size=4] [L523] RET, EXPR l_malloc(sizeof(int)) [L523] int *a = (int*) l_malloc(sizeof(int)); [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L536] globalState = 0 [L524] RET l_free(a) VAL [\old(argc)=49, a={-1:0}, argc=49, argv={51:50}, argv={51:50}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, globalState=0, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () [L535] CALL __blast_assert () [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 95 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 53 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59 IncrementalHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 42 mSDtfsCounter, 59 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 74 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 08:08:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE