./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be --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 2bbfc52b9a0467d32481e7413235257f8cdbdcb51c829bb358c94a1739554a21 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:20:40,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:20:40,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:20:40,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:20:40,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:20:40,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:20:40,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:20:40,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:20:40,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:20:40,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:20:40,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:20:40,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:20:40,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:20:40,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:20:40,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:20:40,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:20:40,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:20:40,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:20:40,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:20:40,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:20:40,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:20:40,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:20:40,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:20:40,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:20:40,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:20:40,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:20:40,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:20:40,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:20:40,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:20:40,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:20:40,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:20:40,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:20:40,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:20:40,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:20:40,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:20:40,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:20:40,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:20:40,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:20:40,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:20:40,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:20:40,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:20:40,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:20:40,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:20:40,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:20:40,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:20:40,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:20:40,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:20:40,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:20:40,269 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:20:40,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:20:40,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:20:40,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:20:40,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:20:40,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:20:40,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:20:40,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:20:40,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:20:40,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:20:40,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:20:40,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:20:40,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:20:40,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:20:40,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:20:40,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:20:40,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:20:40,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:20:40,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:20:40,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:20:40,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:20:40,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:20:40,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:20:40,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:20:40,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:20:40,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:20:40,276 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bbfc52b9a0467d32481e7413235257f8cdbdcb51c829bb358c94a1739554a21 [2021-10-21 20:20:40,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:20:40,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:20:40,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:20:40,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:20:40,615 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:20:40,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/recursive-simple/id_b2_o3.c [2021-10-21 20:20:40,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/data/09a72e0fa/60fcb22cee474c448bf7960a4b8849ee/FLAGf088159b8 [2021-10-21 20:20:41,177 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:20:41,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/sv-benchmarks/c/recursive-simple/id_b2_o3.c [2021-10-21 20:20:41,185 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/data/09a72e0fa/60fcb22cee474c448bf7960a4b8849ee/FLAGf088159b8 [2021-10-21 20:20:41,539 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/data/09a72e0fa/60fcb22cee474c448bf7960a4b8849ee [2021-10-21 20:20:41,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:20:41,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:20:41,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:20:41,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:20:41,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:20:41,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc041a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41, skipping insertion in model container [2021-10-21 20:20:41,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:20:41,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:20:41,732 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/sv-benchmarks/c/recursive-simple/id_b2_o3.c[568,581] [2021-10-21 20:20:41,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:20:41,744 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:20:41,766 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/sv-benchmarks/c/recursive-simple/id_b2_o3.c[568,581] [2021-10-21 20:20:41,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:20:41,779 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:20:41,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41 WrapperNode [2021-10-21 20:20:41,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:20:41,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:20:41,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:20:41,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:20:41,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:20:41,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:20:41,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:20:41,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:20:41,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:20:41,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:20:41,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:20:41,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:20:41,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (1/1) ... [2021-10-21 20:20:41,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:20:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:20:41,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:20:41,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:20:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:20:41,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:20:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:20:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-21 20:20:41,916 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-21 20:20:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:20:42,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:20:42,106 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 20:20:42,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:20:42 BoogieIcfgContainer [2021-10-21 20:20:42,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:20:42,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:20:42,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:20:42,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:20:42,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:20:41" (1/3) ... [2021-10-21 20:20:42,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71237672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:20:42, skipping insertion in model container [2021-10-21 20:20:42,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:20:41" (2/3) ... [2021-10-21 20:20:42,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71237672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:20:42, skipping insertion in model container [2021-10-21 20:20:42,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:20:42" (3/3) ... [2021-10-21 20:20:42,137 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2021-10-21 20:20:42,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:20:42,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:20:42,211 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:20:42,219 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 [2021-10-21 20:20:42,220 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:20:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-10-21 20:20:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:20:42,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:42,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:42,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2021-10-21 20:20:42,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:42,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152000233] [2021-10-21 20:20:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:42,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:42,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:20:42,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:42,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152000233] [2021-10-21 20:20:42,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152000233] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:20:42,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:20:42,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:20:42,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137550061] [2021-10-21 20:20:42,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:20:42,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:20:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:20:42,554 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:20:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:42,597 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-10-21 20:20:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:20:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 20:20:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:42,608 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:20:42,609 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 20:20:42,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:20:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 20:20:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-21 20:20:42,653 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:20:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-21 20:20:42,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-10-21 20:20:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:42,657 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-21 20:20:42,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:20:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-21 20:20:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:20:42,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:42,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:42,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:20:42,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2021-10-21 20:20:42,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:42,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120992740] [2021-10-21 20:20:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:42,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:42,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:20:42,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:42,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120992740] [2021-10-21 20:20:42,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120992740] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:20:42,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:20:42,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:20:42,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881933567] [2021-10-21 20:20:42,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:20:42,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:20:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:20:42,906 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:42,940 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-10-21 20:20:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:20:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-10-21 20:20:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:42,952 INFO L225 Difference]: With dead ends: 28 [2021-10-21 20:20:42,953 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:20:42,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:20:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:20:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-10-21 20:20:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 20:20:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-21 20:20:42,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-10-21 20:20:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-21 20:20:42,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-21 20:20:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:20:42,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:42,971 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:42,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:20:42,972 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2021-10-21 20:20:42,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:42,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525957382] [2021-10-21 20:20:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:42,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:43,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:43,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:20:43,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:43,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525957382] [2021-10-21 20:20:43,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525957382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:43,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086947744] [2021-10-21 20:20:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:43,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:20:43,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:20:43,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:20:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:20:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:20:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:20:43,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086947744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:43,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:20:43,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:20:43,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931564210] [2021-10-21 20:20:43,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:20:43,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:20:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:20:43,671 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:43,736 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-21 20:20:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:20:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-10-21 20:20:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:43,738 INFO L225 Difference]: With dead ends: 24 [2021-10-21 20:20:43,739 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:20:43,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:20:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:20:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 20:20:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:20:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-21 20:20:43,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-10-21 20:20:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:43,751 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-21 20:20:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-21 20:20:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:20:43,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:43,757 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:43,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:20:43,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:43,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times [2021-10-21 20:20:43,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:43,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410950482] [2021-10-21 20:20:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:43,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:20:44,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:44,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410950482] [2021-10-21 20:20:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410950482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:44,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282272221] [2021-10-21 20:20:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:44,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:20:44,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:20:44,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:20:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:20:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:20:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:20:44,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282272221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:20:44,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:20:44,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-10-21 20:20:44,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582605992] [2021-10-21 20:20:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:20:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:20:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:20:44,402 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:44,419 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-21 20:20:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:20:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-21 20:20:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:44,422 INFO L225 Difference]: With dead ends: 26 [2021-10-21 20:20:44,422 INFO L226 Difference]: Without dead ends: 22 [2021-10-21 20:20:44,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:20:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-21 20:20:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-10-21 20:20:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:20:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-21 20:20:44,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24 [2021-10-21 20:20:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:44,434 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-21 20:20:44,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-21 20:20:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:20:44,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:44,438 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:44,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:20:44,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:44,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:44,655 INFO L82 PathProgramCache]: Analyzing trace with hash -727314696, now seen corresponding path program 2 times [2021-10-21 20:20:44,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:44,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444758642] [2021-10-21 20:20:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:44,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:20:44,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:44,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444758642] [2021-10-21 20:20:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444758642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:44,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646195504] [2021-10-21 20:20:44,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:20:44,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:20:44,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:20:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:20:45,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:20:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:20:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 20:20:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:20:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:20:45,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646195504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:45,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:20:45,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 20:20:45,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529961702] [2021-10-21 20:20:45,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:20:45,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:20:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:20:45,258 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:20:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:45,336 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-21 20:20:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:20:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-10-21 20:20:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:45,339 INFO L225 Difference]: With dead ends: 38 [2021-10-21 20:20:45,339 INFO L226 Difference]: Without dead ends: 26 [2021-10-21 20:20:45,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:20:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-21 20:20:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-10-21 20:20:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 20:20:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-21 20:20:45,358 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 24 [2021-10-21 20:20:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-21 20:20:45,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 20:20:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-21 20:20:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 20:20:45,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:20:45,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:20:45,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:20:45,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:45,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:20:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:20:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1955837112, now seen corresponding path program 3 times [2021-10-21 20:20:45,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:20:45,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464637346] [2021-10-21 20:20:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:20:45,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:20:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:45,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:45,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:20:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:20:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:20:45,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:20:45,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464637346] [2021-10-21 20:20:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464637346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:20:45,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632719562] [2021-10-21 20:20:45,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:20:45,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:20:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:20:45,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:20:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:20:45,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:20:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:20:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:20:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:20:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:20:46,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632719562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:20:46,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:20:46,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-10-21 20:20:46,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738960537] [2021-10-21 20:20:46,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:20:46,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:20:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:20:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:20:46,068 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:20:46,088 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-21 20:20:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:20:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-10-21 20:20:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:20:46,090 INFO L225 Difference]: With dead ends: 24 [2021-10-21 20:20:46,090 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:20:46,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:20:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:20:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:20:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:20:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:20:46,091 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-10-21 20:20:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:20:46,092 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:20:46,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 20:20:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:20:46,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:20:46,095 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:20:46,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:20:46,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:20:46,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 20:20:46,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:20:46,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:20:46,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:20:46,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:20:46,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:20:46,327 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 20:20:46,327 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 20:20:46,327 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 20:20:46,327 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 20:20:46,328 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-21 20:20:46,328 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-10-21 20:20:46,328 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-10-21 20:20:46,328 INFO L860 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: true [2021-10-21 20:20:46,328 INFO L857 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-10-21 20:20:46,329 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 19) no Hoare annotation was computed. [2021-10-21 20:20:46,329 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-10-21 20:20:46,329 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-10-21 20:20:46,330 INFO L857 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-10-21 20:20:46,330 INFO L860 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: true [2021-10-21 20:20:46,330 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-10-21 20:20:46,330 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-21 20:20:46,331 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-21 20:20:46,335 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:20:46,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:20:46 BoogieIcfgContainer [2021-10-21 20:20:46,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:20:46,340 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:20:46,340 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:20:46,340 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:20:46,341 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:20:42" (3/4) ... [2021-10-21 20:20:46,346 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:20:46,357 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-10-21 20:20:46,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 20:20:46,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:20:46,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:20:46,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:20:46,409 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:20:46,409 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:20:46,411 INFO L168 Benchmark]: Toolchain (without parser) took 4867.54 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 101.1 MB in the beginning and 72.1 MB in the end (delta: 29.0 MB). Peak memory consumption was 56.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,411 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 130.0 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:20:46,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.95 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 102.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.27 ms. Allocated memory is still 130.0 MB. Free memory was 102.9 MB in the beginning and 101.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,415 INFO L168 Benchmark]: Boogie Preprocessor took 18.40 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 100.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:20:46,415 INFO L168 Benchmark]: RCFGBuilder took 279.10 ms. Allocated memory is still 130.0 MB. Free memory was 100.6 MB in the beginning and 91.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,415 INFO L168 Benchmark]: TraceAbstraction took 4225.69 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.2 MB in the beginning and 75.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,416 INFO L168 Benchmark]: Witness Printer took 69.49 ms. Allocated memory is still 157.3 MB. Free memory was 75.2 MB in the beginning and 72.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:20:46,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 130.0 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.95 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 102.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.27 ms. Allocated memory is still 130.0 MB. Free memory was 102.9 MB in the beginning and 101.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.40 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 100.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.10 ms. Allocated memory is still 130.0 MB. Free memory was 100.6 MB in the beginning and 91.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4225.69 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.2 MB in the beginning and 75.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. * Witness Printer took 69.49 ms. Allocated memory is still 157.3 MB. Free memory was 75.2 MB in the beginning and 72.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4126.0ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 23.2ms, AutomataDifference: 326.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 95 SDtfs, 11 SDslu, 400 SDs, 0 SdLazy, 135 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 485.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 73.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 8.0ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 50.1ms SsaConstructionTime, 226.4ms SatisfiabilityAnalysisTime, 2053.9ms InterpolantComputationTime, 219 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 651 SizeOfPredicates, 7 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 102/138 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:20:46,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842ba2e-208d-4c45-8e42-77b272c0a1af/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...