./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/for_bounded_loop1.c --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/loops/for_bounded_loop1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:29:59,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:30:00,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:30:00,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:30:00,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:30:00,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:30:00,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:30:00,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:30:00,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:30:00,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:30:00,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:30:00,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:30:00,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:30:00,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:30:00,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:30:00,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:30:00,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:30:00,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:30:00,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:30:00,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:30:00,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:30:00,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:30:00,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:30:00,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:30:00,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:30:00,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:30:00,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:30:00,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:30:00,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:30:00,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:30:00,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:30:00,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:30:00,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:30:00,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:30:00,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:30:00,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:30:00,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:30:00,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:30:00,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:30:00,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:30:00,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:30:00,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:30:00,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:30:00,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:30:00,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:30:00,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:30:00,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:30:00,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:30:00,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:30:00,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:30:00,138 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:30:00,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:30:00,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:30:00,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:30:00,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:30:00,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:30:00,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:30:00,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:30:00,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:30:00,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:30:00,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:30:00,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:30:00,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:30:00,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:30:00,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:30:00,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:30:00,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:30:00,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:30:00,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:30:00,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:30:00,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:30:00,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:30:00,143 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:30:00,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:30:00,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:30:00,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:30:00,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 [2021-12-17 09:30:00,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:30:00,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:30:00,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:30:00,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:30:00,395 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:30:00,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/for_bounded_loop1.c [2021-12-17 09:30:00,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf83de11/adde848fa3b84c08a290d5a42b9367e9/FLAGa13a7b09c [2021-12-17 09:30:00,880 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:30:00,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c [2021-12-17 09:30:00,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf83de11/adde848fa3b84c08a290d5a42b9367e9/FLAGa13a7b09c [2021-12-17 09:30:01,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf83de11/adde848fa3b84c08a290d5a42b9367e9 [2021-12-17 09:30:01,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:30:01,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:30:01,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:30:01,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:30:01,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:30:01,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246bcfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01, skipping insertion in model container [2021-12-17 09:30:01,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:30:01,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:30:01,527 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/loops/for_bounded_loop1.c[416,429] [2021-12-17 09:30:01,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:30:01,553 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:30:01,566 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/loops/for_bounded_loop1.c[416,429] [2021-12-17 09:30:01,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:30:01,584 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:30:01,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01 WrapperNode [2021-12-17 09:30:01,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:30:01,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:30:01,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:30:01,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:30:01,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,614 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2021-12-17 09:30:01,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:30:01,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:30:01,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:30:01,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:30:01,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:30:01,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:30:01,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:30:01,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:30:01,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (1/1) ... [2021-12-17 09:30:01,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:30:01,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:30:01,677 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 09:30:01,703 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 09:30:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:30:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:30:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:30:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:30:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 09:30:01,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 09:30:01,777 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:30:01,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:30:01,914 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:30:01,921 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:30:01,922 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 09:30:01,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:30:01 BoogieIcfgContainer [2021-12-17 09:30:01,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:30:01,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:30:01,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:30:01,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:30:01,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:30:01" (1/3) ... [2021-12-17 09:30:01,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bffb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:30:01, skipping insertion in model container [2021-12-17 09:30:01,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:30:01" (2/3) ... [2021-12-17 09:30:01,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bffb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:30:01, skipping insertion in model container [2021-12-17 09:30:01,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:30:01" (3/3) ... [2021-12-17 09:30:01,933 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-12-17 09:30:01,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:30:01,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:30:01,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:30:01,993 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 09:30:01,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:30:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 09:30:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:30:02,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:30:02,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:30:02,016 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:30:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:30:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash 194354858, now seen corresponding path program 1 times [2021-12-17 09:30:02,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:30:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630464740] [2021-12-17 09:30:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:30:02,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:30:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:30:02,182 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 09:30:02,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:30:02,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630464740] [2021-12-17 09:30:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630464740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:30:02,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:30:02,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:30:02,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579809941] [2021-12-17 09:30:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:30:02,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:30:02,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:30:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:30:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:30:02,236 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:30:02,261 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-12-17 09:30:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:30:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 09:30:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:30:02,271 INFO L225 Difference]: With dead ends: 35 [2021-12-17 09:30:02,272 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 09:30:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:30:02,281 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:30:02,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:30:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 09:30:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 09:30:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 09:30:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-17 09:30:02,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-17 09:30:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:30:02,317 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-17 09:30:02,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-17 09:30:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:30:02,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:30:02,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:30:02,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:30:02,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:30:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:30:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 181425564, now seen corresponding path program 1 times [2021-12-17 09:30:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:30:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911728698] [2021-12-17 09:30:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:30:02,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:30:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:30:02,404 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 09:30:02,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:30:02,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911728698] [2021-12-17 09:30:02,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911728698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:30:02,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:30:02,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:30:02,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838997341] [2021-12-17 09:30:02,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:30:02,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:30:02,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:30:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:30:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:30:02,410 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:30:02,438 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-17 09:30:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:30:02,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 09:30:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:30:02,441 INFO L225 Difference]: With dead ends: 29 [2021-12-17 09:30:02,441 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 09:30:02,445 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 09:30:02,446 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:30:02,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:30:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 09:30:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-12-17 09:30:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 09:30:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-17 09:30:02,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 8 [2021-12-17 09:30:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:30:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-17 09:30:02,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-17 09:30:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:30:02,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:30:02,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:30:02,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:30:02,466 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:30:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:30:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash 183153442, now seen corresponding path program 1 times [2021-12-17 09:30:02,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:30:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203758768] [2021-12-17 09:30:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:30:02,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:30:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:30:02,575 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 09:30:02,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:30:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203758768] [2021-12-17 09:30:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203758768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:30:02,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:30:02,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 09:30:02,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234037730] [2021-12-17 09:30:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:30:02,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 09:30:02,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:30:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 09:30:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 09:30:02,579 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:30:02,625 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-12-17 09:30:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 09:30:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 09:30:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:30:02,627 INFO L225 Difference]: With dead ends: 26 [2021-12-17 09:30:02,627 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 09:30:02,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:30:02,634 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:30:02,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:30:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 09:30:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-12-17 09:30:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 09:30:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-17 09:30:02,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2021-12-17 09:30:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:30:02,644 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-17 09:30:02,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:30:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-17 09:30:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 09:30:02,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:30:02,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:30:02,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 09:30:02,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:30:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:30:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1335896453, now seen corresponding path program 1 times [2021-12-17 09:30:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:30:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914100134] [2021-12-17 09:30:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:30:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:30:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:30:02,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 09:30:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:30:02,781 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 09:30:02,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:30:02,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914100134] [2021-12-17 09:30:02,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914100134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:30:02,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:30:02,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 09:30:02,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064254572] [2021-12-17 09:30:02,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:30:02,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:30:02,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:30:02,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:30:02,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:30:02,791 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 09:30:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:30:02,842 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-17 09:30:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 09:30:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 15 [2021-12-17 09:30:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:30:02,843 INFO L225 Difference]: With dead ends: 34 [2021-12-17 09:30:02,843 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 09:30:02,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:30:02,844 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:30:02,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:30:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 09:30:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-12-17 09:30:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 09:30:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-17 09:30:02,850 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2021-12-17 09:30:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:30:02,850 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-17 09:30:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 09:30:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-17 09:30:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 09:30:02,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:30:02,851 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:30:02,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 09:30:02,852 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:30:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:30:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1291608463, now seen corresponding path program 1 times [2021-12-17 09:30:02,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:30:02,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854770577] [2021-12-17 09:30:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:30:02,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:30:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:30:02,866 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 09:30:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:30:02,894 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 09:30:02,894 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 09:30:02,895 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 09:30:02,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 09:30:02,899 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-17 09:30:02,901 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 09:30:02,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:30:02 BoogieIcfgContainer [2021-12-17 09:30:02,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 09:30:02,921 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 09:30:02,921 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 09:30:02,922 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 09:30:02,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:30:01" (3/4) ... [2021-12-17 09:30:02,924 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 09:30:02,953 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 09:30:02,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 09:30:02,954 INFO L158 Benchmark]: Toolchain (without parser) took 1656.07ms. Allocated memory is still 130.0MB. Free memory was 98.8MB in the beginning and 84.3MB in the end (delta: 14.6MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,954 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory was 38.3MB in the beginning and 38.3MB in the end (delta: 39.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:30:02,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.46ms. Allocated memory is still 130.0MB. Free memory was 98.6MB in the beginning and 107.5MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,955 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.26ms. Allocated memory is still 130.0MB. Free memory was 107.1MB in the beginning and 105.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,955 INFO L158 Benchmark]: Boogie Preprocessor took 27.10ms. Allocated memory is still 130.0MB. Free memory was 105.8MB in the beginning and 104.9MB in the end (delta: 853.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:30:02,955 INFO L158 Benchmark]: RCFGBuilder took 280.64ms. Allocated memory is still 130.0MB. Free memory was 104.9MB in the beginning and 95.7MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,956 INFO L158 Benchmark]: TraceAbstraction took 995.05ms. Allocated memory is still 130.0MB. Free memory was 95.3MB in the beginning and 86.4MB in the end (delta: 8.9MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,956 INFO L158 Benchmark]: Witness Printer took 32.03ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 84.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:30:02,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory was 38.3MB in the beginning and 38.3MB in the end (delta: 39.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.46ms. Allocated memory is still 130.0MB. Free memory was 98.6MB in the beginning and 107.5MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.26ms. Allocated memory is still 130.0MB. Free memory was 107.1MB in the beginning and 105.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.10ms. Allocated memory is still 130.0MB. Free memory was 105.8MB in the beginning and 104.9MB in the end (delta: 853.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 280.64ms. Allocated memory is still 130.0MB. Free memory was 104.9MB in the beginning and 95.7MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 995.05ms. Allocated memory is still 130.0MB. Free memory was 95.3MB in the beginning and 86.4MB in the end (delta: 8.9MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * Witness Printer took 32.03ms. Allocated memory is still 130.0MB. Free memory was 86.4MB in the beginning and 84.3MB 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: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i