./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test28-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test28-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3 --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 1e116c6e12c8b7e2ae6090f5bc613fcdc6f61f79 ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:47:43,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:47:43,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:47:43,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:47:43,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:47:43,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:47:43,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:47:43,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:47:43,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:47:43,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:47:43,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:47:43,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:47:43,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:47:43,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:47:43,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:47:43,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:47:43,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:47:43,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:47:43,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:47:43,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:47:43,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:47:43,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:47:43,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:47:43,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:47:43,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:47:43,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:47:43,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:47:43,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:47:43,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:47:43,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:47:43,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:47:43,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:47:43,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:47:43,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:47:43,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:47:43,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:47:43,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:47:43,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:47:43,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:47:43,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:47:43,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:47:43,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:47:43,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:47:43,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:47:43,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:47:43,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:47:43,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:47:43,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:47:43,259 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:47:43,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:47:43,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:47:43,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:47:43,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:47:43,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:47:43,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:47:43,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:47:43,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:47:43,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:47:43,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:47:43,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:47:43,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:47:43,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:47:43,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:47:43,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:47:43,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:47:43,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:47:43,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:47:43,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:47:43,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:47:43,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:47:43,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:47:43,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:47:43,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:47:43,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:47:43,265 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_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e116c6e12c8b7e2ae6090f5bc613fcdc6f61f79 [2021-10-15 19:47:43,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:47:43,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:47:43,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:47:43,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:47:43,591 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:47:43,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/ldv-regression/test28-2.c [2021-10-15 19:47:43,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/data/184e80e76/e576d9084b444857b5490de279383518/FLAGd1353475e [2021-10-15 19:47:44,275 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:47:44,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/sv-benchmarks/c/ldv-regression/test28-2.c [2021-10-15 19:47:44,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/data/184e80e76/e576d9084b444857b5490de279383518/FLAGd1353475e [2021-10-15 19:47:44,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/data/184e80e76/e576d9084b444857b5490de279383518 [2021-10-15 19:47:44,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:47:44,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:47:44,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:47:44,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:47:44,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:47:44,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468b9d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44, skipping insertion in model container [2021-10-15 19:47:44,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:47:44,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:47:44,859 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_b6044c89-0244-418d-b956-eec1f20fdda4/sv-benchmarks/c/ldv-regression/test28-2.c[576,589] [2021-10-15 19:47:44,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:47:44,882 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:47:44,903 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_b6044c89-0244-418d-b956-eec1f20fdda4/sv-benchmarks/c/ldv-regression/test28-2.c[576,589] [2021-10-15 19:47:44,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:47:44,921 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:47:44,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44 WrapperNode [2021-10-15 19:47:44,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:47:44,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:47:44,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:47:44,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:47:44,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:47:44,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:47:44,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:47:44,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:47:44,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:44,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:45,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:47:45,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:47:45,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:47:45,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:47:45,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (1/1) ... [2021-10-15 19:47:45,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:47:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:45,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:47:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:47:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:47:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:47:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:47:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:47:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:47:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:47:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:47:45,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:47:45,367 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:47:45,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:47:45 BoogieIcfgContainer [2021-10-15 19:47:45,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:47:45,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:47:45,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:47:45,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:47:45,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:47:44" (1/3) ... [2021-10-15 19:47:45,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133b67a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:47:45, skipping insertion in model container [2021-10-15 19:47:45,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:47:44" (2/3) ... [2021-10-15 19:47:45,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133b67a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:47:45, skipping insertion in model container [2021-10-15 19:47:45,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:47:45" (3/3) ... [2021-10-15 19:47:45,392 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2021-10-15 19:47:45,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:47:45,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:47:45,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:47:45,467 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, mConcurrency=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 [2021-10-15 19:47:45,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:47:45,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 16 transitions, 32 flow [2021-10-15 19:47:45,513 INFO L129 PetriNetUnfolder]: 4/16 cut-off events. [2021-10-15 19:47:45,514 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:47:45,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:47:45,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 16 transitions, 32 flow [2021-10-15 19:47:45,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 10 places, 12 transitions, 24 flow [2021-10-15 19:47:45,538 INFO L129 PetriNetUnfolder]: 3/11 cut-off events. [2021-10-15 19:47:45,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:47:45,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:45,542 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:45,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1180938670, now seen corresponding path program 1 times [2021-10-15 19:47:45,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:45,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529933394] [2021-10-15 19:47:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:45,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:45,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:45,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529933394] [2021-10-15 19:47:45,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529933394] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:45,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:45,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:47:45,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34909357] [2021-10-15 19:47:45,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:47:45,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:47:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:47:46,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:47:46,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 12 transitions, 24 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-10-15 19:47:46,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:46,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:47:46,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:46,107 INFO L129 PetriNetUnfolder]: 3/19 cut-off events. [2021-10-15 19:47:46,108 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:47:46,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 19 events. 3/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 19:47:46,146 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 9 selfloop transitions, 3 changer transitions 0/16 dead transitions. [2021-10-15 19:47:46,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 16 transitions, 56 flow [2021-10-15 19:47:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:47:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:47:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2021-10-15 19:47:46,203 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5375 [2021-10-15 19:47:46,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 43 transitions. [2021-10-15 19:47:46,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 43 transitions. [2021-10-15 19:47:46,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:46,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 43 transitions. [2021-10-15 19:47:46,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2021-10-15 19:47:46,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-10-15 19:47:46,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-10-15 19:47:46,220 INFO L186 Difference]: Start difference. First operand has 10 places, 12 transitions, 24 flow. Second operand 5 states and 43 transitions. [2021-10-15 19:47:46,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 16 transitions, 56 flow [2021-10-15 19:47:46,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 16 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:47:46,235 INFO L242 Difference]: Finished difference. Result has 16 places, 13 transitions, 39 flow [2021-10-15 19:47:46,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=39, PETRI_PLACES=16, PETRI_TRANSITIONS=13} [2021-10-15 19:47:46,238 INFO L334 CegarLoopForPetriNet]: 10 programPoint places, 6 predicate places. [2021-10-15 19:47:46,239 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 13 transitions, 39 flow [2021-10-15 19:47:46,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-10-15 19:47:46,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:46,241 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:46,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:47:46,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1182787634, now seen corresponding path program 1 times [2021-10-15 19:47:46,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:46,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027741518] [2021-10-15 19:47:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:46,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027741518] [2021-10-15 19:47:46,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027741518] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:46,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:46,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:47:46,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959270670] [2021-10-15 19:47:46,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:47:46,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:47:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:47:46,384 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 16 [2021-10-15 19:47:46,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 13 transitions, 39 flow. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-15 19:47:46,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:46,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 16 [2021-10-15 19:47:46,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:46,456 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2021-10-15 19:47:46,456 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:47:46,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 19. Up to 10 conditions per place. [2021-10-15 19:47:46,458 INFO L132 encePairwiseOnDemand]: 11/16 looper letters, 11 selfloop transitions, 4 changer transitions 0/17 dead transitions. [2021-10-15 19:47:46,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 77 flow [2021-10-15 19:47:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:47:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:47:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2021-10-15 19:47:46,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45 [2021-10-15 19:47:46,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 36 transitions. [2021-10-15 19:47:46,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 36 transitions. [2021-10-15 19:47:46,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:46,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 36 transitions. [2021-10-15 19:47:46,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-10-15 19:47:46,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-10-15 19:47:46,475 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-10-15 19:47:46,475 INFO L186 Difference]: Start difference. First operand has 16 places, 13 transitions, 39 flow. Second operand 5 states and 36 transitions. [2021-10-15 19:47:46,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 77 flow [2021-10-15 19:47:46,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 74 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:47:46,485 INFO L242 Difference]: Finished difference. Result has 20 places, 15 transitions, 59 flow [2021-10-15 19:47:46,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2021-10-15 19:47:46,486 INFO L334 CegarLoopForPetriNet]: 10 programPoint places, 10 predicate places. [2021-10-15 19:47:46,486 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 59 flow [2021-10-15 19:47:46,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-10-15 19:47:46,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:46,487 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:46,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:47:46,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1182785712, now seen corresponding path program 1 times [2021-10-15 19:47:46,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:46,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212866659] [2021-10-15 19:47:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:46,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:46,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:46,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212866659] [2021-10-15 19:47:46,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212866659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:46,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:46,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:47:46,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417102190] [2021-10-15 19:47:46,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:47:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:47:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:47:46,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 16 [2021-10-15 19:47:46,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 59 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-15 19:47:46,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:46,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 16 [2021-10-15 19:47:46,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:46,916 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2021-10-15 19:47:46,917 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:47:46,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 16 events. 1/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 2/17 useless extension candidates. Maximal degree in co-relation 28. Up to 8 conditions per place. [2021-10-15 19:47:46,918 INFO L132 encePairwiseOnDemand]: 9/16 looper letters, 8 selfloop transitions, 1 changer transitions 6/16 dead transitions. [2021-10-15 19:47:46,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 91 flow [2021-10-15 19:47:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:47:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:47:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 41 transitions. [2021-10-15 19:47:46,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3203125 [2021-10-15 19:47:46,924 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 41 transitions. [2021-10-15 19:47:46,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 41 transitions. [2021-10-15 19:47:46,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:46,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 41 transitions. [2021-10-15 19:47:46,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2021-10-15 19:47:46,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 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) [2021-10-15 19:47:46,927 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 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) [2021-10-15 19:47:46,927 INFO L186 Difference]: Start difference. First operand has 20 places, 15 transitions, 59 flow. Second operand 8 states and 41 transitions. [2021-10-15 19:47:46,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 91 flow [2021-10-15 19:47:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:47:46,930 INFO L242 Difference]: Finished difference. Result has 28 places, 10 transitions, 36 flow [2021-10-15 19:47:46,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=36, PETRI_PLACES=28, PETRI_TRANSITIONS=10} [2021-10-15 19:47:46,930 INFO L334 CegarLoopForPetriNet]: 10 programPoint places, 18 predicate places. [2021-10-15 19:47:46,930 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 10 transitions, 36 flow [2021-10-15 19:47:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-15 19:47:46,931 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:46,931 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:46,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:47:46,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2021-10-15 19:47:46,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:46,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247868222] [2021-10-15 19:47:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:46,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:47,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:47,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247868222] [2021-10-15 19:47:47,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247868222] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:47:47,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:47:47,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:47:47,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625950821] [2021-10-15 19:47:47,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:47:47,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:47:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:47:47,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 16 [2021-10-15 19:47:47,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 10 transitions, 36 flow. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-10-15 19:47:47,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:47,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 16 [2021-10-15 19:47:47,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:47,109 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-10-15 19:47:47,109 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:47:47,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 7 events. 1/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 18. Up to 3 conditions per place. [2021-10-15 19:47:47,110 INFO L132 encePairwiseOnDemand]: 11/16 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-10-15 19:47:47,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 7 transitions, 36 flow [2021-10-15 19:47:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:47:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:47:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 31 transitions. [2021-10-15 19:47:47,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2021-10-15 19:47:47,114 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 31 transitions. [2021-10-15 19:47:47,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 31 transitions. [2021-10-15 19:47:47,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:47,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 31 transitions. [2021-10-15 19:47:47,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2021-10-15 19:47:47,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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) [2021-10-15 19:47:47,119 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 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) [2021-10-15 19:47:47,119 INFO L186 Difference]: Start difference. First operand has 28 places, 10 transitions, 36 flow. Second operand 6 states and 31 transitions. [2021-10-15 19:47:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 7 transitions, 36 flow [2021-10-15 19:47:47,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 7 transitions, 27 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 19:47:47,120 INFO L242 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-10-15 19:47:47,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-10-15 19:47:47,120 INFO L334 CegarLoopForPetriNet]: 10 programPoint places, 6 predicate places. [2021-10-15 19:47:47,121 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-10-15 19:47:47,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2021-10-15 19:47:47,125 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:47:47,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:47:47,131 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:47:47,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:47:47 BoogieIcfgContainer [2021-10-15 19:47:47,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:47:47,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:47:47,138 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:47:47,138 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:47:47,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:47:45" (3/4) ... [2021-10-15 19:47:47,143 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:47:47,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 19:47:47,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:47:47,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:47:47,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:47:47,221 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:47:47,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:47:47,222 INFO L168 Benchmark]: Toolchain (without parser) took 2593.17 ms. Allocated memory is still 115.3 MB. Free memory was 82.0 MB in the beginning and 56.8 MB in the end (delta: 25.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,223 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:47:47,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.77 ms. Allocated memory is still 115.3 MB. Free memory was 81.8 MB in the beginning and 90.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 89.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,224 INFO L168 Benchmark]: Boogie Preprocessor took 35.93 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 88.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,225 INFO L168 Benchmark]: RCFGBuilder took 368.51 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 78.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,225 INFO L168 Benchmark]: TraceAbstraction took 1765.65 ms. Allocated memory is still 115.3 MB. Free memory was 78.2 MB in the beginning and 59.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,225 INFO L168 Benchmark]: Witness Printer took 83.46 ms. Allocated memory is still 115.3 MB. Free memory was 58.9 MB in the beginning and 56.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:47,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.77 ms. Allocated memory is still 115.3 MB. Free memory was 81.8 MB in the beginning and 90.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 89.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.93 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 88.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 368.51 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 78.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1765.65 ms. Allocated memory is still 115.3 MB. Free memory was 78.2 MB in the beginning and 59.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 16.1 GB. * Witness Printer took 83.46 ms. Allocated memory is still 115.3 MB. Free memory was 58.9 MB in the beginning and 56.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 28]: 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 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1684.4ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 548.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 42 SDslu, 24 SDs, 0 SdLazy, 96 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 199.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=2, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.8ms SsaConstructionTime, 175.7ms SatisfiabilityAnalysisTime, 595.6ms InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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! [2021-10-15 19:47:47,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6044c89-0244-418d-b956-eec1f20fdda4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...