./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.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_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/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_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/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_f1a74f96-aeae-4193-a4b7-a54751dccee0/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 4f912e141cfd9116e6012d7a1a78045cf8af895a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:17:44,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:17:44,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:17:44,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:17:44,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:17:44,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:17:44,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:17:44,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:17:44,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:17:44,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:17:44,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:17:44,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:17:44,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:17:44,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:17:44,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:17:44,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:17:44,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:17:44,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:17:44,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:17:44,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:17:44,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:17:44,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:17:44,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:17:44,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:17:44,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:17:44,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:17:44,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:17:44,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:17:44,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:17:44,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:17:44,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:17:44,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:17:44,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:17:44,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:17:44,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:17:44,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:17:44,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:17:44,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:17:44,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:17:44,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:17:44,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:17:44,348 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:17:44,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:17:44,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:17:44,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:17:44,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:17:44,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:17:44,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:17:44,413 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:17:44,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:17:44,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:17:44,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:17:44,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:17:44,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:17:44,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:17:44,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:17:44,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:17:44,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:17:44,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:17:44,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:17:44,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:17:44,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:17:44,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:17:44,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:17:44,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:17:44,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:17:44,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:17:44,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:17:44,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:17:44,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:17:44,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:17:44,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:17:44,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:17:44,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:17:44,421 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_f1a74f96-aeae-4193-a4b7-a54751dccee0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f912e141cfd9116e6012d7a1a78045cf8af895a [2021-10-15 19:17:44,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:17:44,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:17:44,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:17:44,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:17:44,831 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:17:44,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c [2021-10-15 19:17:44,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/data/a8b9a229a/d2e3a3b960ae412cbea97ebd64ee9137/FLAG2e4ba8503 [2021-10-15 19:17:45,435 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:17:45,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c [2021-10-15 19:17:45,447 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/data/a8b9a229a/d2e3a3b960ae412cbea97ebd64ee9137/FLAG2e4ba8503 [2021-10-15 19:17:45,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/data/a8b9a229a/d2e3a3b960ae412cbea97ebd64ee9137 [2021-10-15 19:17:45,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:17:45,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:17:45,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:17:45,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:17:45,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:17:45,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:17:45" (1/1) ... [2021-10-15 19:17:45,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f46f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:45, skipping insertion in model container [2021-10-15 19:17:45,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:17:45" (1/1) ... [2021-10-15 19:17:45,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:17:45,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:17:46,012 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_f1a74f96-aeae-4193-a4b7-a54751dccee0/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2021-10-15 19:17:46,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:17:46,051 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:17:46,069 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_f1a74f96-aeae-4193-a4b7-a54751dccee0/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2021-10-15 19:17:46,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:17:46,096 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:17:46,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46 WrapperNode [2021-10-15 19:17:46,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:17:46,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:17:46,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:17:46,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:17:46,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:17:46,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:17:46,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:17:46,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:17:46,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:17:46,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:17:46,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:17:46,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:17:46,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (1/1) ... [2021-10-15 19:17:46,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:17:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:46,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:17:46,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:17:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:17:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:17:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:17:46,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:17:46,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:17:46,572 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-15 19:17:46,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:46 BoogieIcfgContainer [2021-10-15 19:17:46,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:17:46,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:17:46,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:17:46,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:17:46,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:17:45" (1/3) ... [2021-10-15 19:17:46,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58235048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:17:46, skipping insertion in model container [2021-10-15 19:17:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:17:46" (2/3) ... [2021-10-15 19:17:46,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58235048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:17:46, skipping insertion in model container [2021-10-15 19:17:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:46" (3/3) ... [2021-10-15 19:17:46,587 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound50.c [2021-10-15 19:17:46,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:17:46,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 19:17:46,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:17:46,673 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 19:17:46,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 19:17:46,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 22 transitions, 44 flow [2021-10-15 19:17:46,716 INFO L129 PetriNetUnfolder]: 6/22 cut-off events. [2021-10-15 19:17:46,717 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:46,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 22 events. 6/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:17:46,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 22 transitions, 44 flow [2021-10-15 19:17:46,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 17 transitions, 34 flow [2021-10-15 19:17:46,732 INFO L129 PetriNetUnfolder]: 5/14 cut-off events. [2021-10-15 19:17:46,733 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:46,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:46,734 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:46,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-15 19:17:46,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:46,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226229738] [2021-10-15 19:17:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:46,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:46,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:17:46,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642835793] [2021-10-15 19:17:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:46,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:46,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:46,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:46,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:17:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:17:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:47,252 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 19:17:47,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:47,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226229738] [2021-10-15 19:17:47,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:17:47,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642835793] [2021-10-15 19:17:47,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642835793] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:17:47,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:17:47,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:17:47,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83887981] [2021-10-15 19:17:47,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:17:47,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:17:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:17:47,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 22 [2021-10-15 19:17:47,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 17 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 19:17:47,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:47,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 22 [2021-10-15 19:17:47,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:47,377 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-10-15 19:17:47,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:17:47,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 19 events. 1/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-10-15 19:17:47,379 INFO L132 encePairwiseOnDemand]: 13/22 looper letters, 8 selfloop transitions, 4 changer transitions 1/18 dead transitions. [2021-10-15 19:17:47,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 18 transitions, 62 flow [2021-10-15 19:17:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:17:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:17:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2021-10-15 19:17:47,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2021-10-15 19:17:47,395 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 63 transitions. [2021-10-15 19:17:47,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 63 transitions. [2021-10-15 19:17:47,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:47,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 63 transitions. [2021-10-15 19:17:47,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 19:17:47,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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 19:17:47,410 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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 19:17:47,412 INFO L186 Difference]: Start difference. First operand has 13 places, 17 transitions, 34 flow. Second operand 5 states and 63 transitions. [2021-10-15 19:17:47,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 18 transitions, 62 flow [2021-10-15 19:17:47,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 18 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:17:47,420 INFO L242 Difference]: Finished difference. Result has 18 places, 16 transitions, 50 flow [2021-10-15 19:17:47,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=50, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2021-10-15 19:17:47,424 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 5 predicate places. [2021-10-15 19:17:47,424 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 50 flow [2021-10-15 19:17:47,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 19:17:47,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:47,425 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:47,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-15 19:17:47,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-10-15 19:17:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:47,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320338826] [2021-10-15 19:17:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:47,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:47,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:17:47,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599680475] [2021-10-15 19:17:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:47,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:47,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:47,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:17:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:17:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:17:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:47,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:47,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320338826] [2021-10-15 19:17:47,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:17:47,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599680475] [2021-10-15 19:17:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599680475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:47,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:17:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709841609] [2021-10-15 19:17:47,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:17:47,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:17:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:17:47,877 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 22 [2021-10-15 19:17:47,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 19:17:47,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:47,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 22 [2021-10-15 19:17:47,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:47,970 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-10-15 19:17:47,971 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:17:47,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 24 events. 1/24 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 2/26 useless extension candidates. Maximal degree in co-relation 3. Up to 9 conditions per place. [2021-10-15 19:17:47,973 INFO L132 encePairwiseOnDemand]: 17/22 looper letters, 10 selfloop transitions, 5 changer transitions 2/22 dead transitions. [2021-10-15 19:17:47,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 100 flow [2021-10-15 19:17:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:17:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:17:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2021-10-15 19:17:47,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2021-10-15 19:17:47,976 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 67 transitions. [2021-10-15 19:17:47,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 67 transitions. [2021-10-15 19:17:47,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:47,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 67 transitions. [2021-10-15 19:17:47,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 19:17:47,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 19:17:47,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 19:17:47,980 INFO L186 Difference]: Start difference. First operand has 18 places, 16 transitions, 50 flow. Second operand 6 states and 67 transitions. [2021-10-15 19:17:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 100 flow [2021-10-15 19:17:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:17:47,988 INFO L242 Difference]: Finished difference. Result has 25 places, 18 transitions, 80 flow [2021-10-15 19:17:47,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2021-10-15 19:17:47,990 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 12 predicate places. [2021-10-15 19:17:47,990 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 80 flow [2021-10-15 19:17:47,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 19:17:47,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:47,992 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:48,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:48,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:48,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-10-15 19:17:48,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:48,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369629596] [2021-10-15 19:17:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:48,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:48,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:17:48,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434484222] [2021-10-15 19:17:48,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:17:48,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:48,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:48,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:17:48,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:17:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:17:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:17:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:17:48,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:48,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369629596] [2021-10-15 19:17:48,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:17:48,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434484222] [2021-10-15 19:17:48,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434484222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:48,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:48,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:17:48,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498661933] [2021-10-15 19:17:48,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:17:48,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:17:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:17:48,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 22 [2021-10-15 19:17:48,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:17:48,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:48,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 22 [2021-10-15 19:17:48,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:48,618 INFO L129 PetriNetUnfolder]: 1/29 cut-off events. [2021-10-15 19:17:48,618 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 19:17:48,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 29 events. 1/29 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 2/31 useless extension candidates. Maximal degree in co-relation 36. Up to 9 conditions per place. [2021-10-15 19:17:48,620 INFO L132 encePairwiseOnDemand]: 17/22 looper letters, 12 selfloop transitions, 6 changer transitions 3/26 dead transitions. [2021-10-15 19:17:48,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 146 flow [2021-10-15 19:17:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:17:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:17:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2021-10-15 19:17:48,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2021-10-15 19:17:48,625 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2021-10-15 19:17:48,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2021-10-15 19:17:48,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:48,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2021-10-15 19:17:48,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 19:17:48,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 19:17:48,631 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 19:17:48,631 INFO L186 Difference]: Start difference. First operand has 25 places, 18 transitions, 80 flow. Second operand 7 states and 79 transitions. [2021-10-15 19:17:48,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 146 flow [2021-10-15 19:17:48,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 19:17:48,642 INFO L242 Difference]: Finished difference. Result has 30 places, 20 transitions, 106 flow [2021-10-15 19:17:48,642 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=106, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2021-10-15 19:17:48,642 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 17 predicate places. [2021-10-15 19:17:48,643 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 106 flow [2021-10-15 19:17:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 19:17:48,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:17:48,643 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:17:48,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:48,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:48,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:17:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:17:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-10-15 19:17:48,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:17:48,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44964276] [2021-10-15 19:17:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:17:48,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:17:48,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:17:48,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247758691] [2021-10-15 19:17:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:17:48,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:17:48,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:17:48,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:17:48,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:17:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:17:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:17:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:17:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:17:49,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:17:49,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44964276] [2021-10-15 19:17:49,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:17:49,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247758691] [2021-10-15 19:17:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247758691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:17:49,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:17:49,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:17:49,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498136842] [2021-10-15 19:17:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:17:49,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:17:49,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:17:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:17:49,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 22 [2021-10-15 19:17:49,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 19:17:49,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:17:49,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 22 [2021-10-15 19:17:49,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:17:49,243 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-10-15 19:17:49,243 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2021-10-15 19:17:49,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 25 events. 1/25 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 2/27 useless extension candidates. Maximal degree in co-relation 15. Up to 17 conditions per place. [2021-10-15 19:17:49,244 INFO L132 encePairwiseOnDemand]: 18/22 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-10-15 19:17:49,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 16 transitions, 112 flow [2021-10-15 19:17:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:17:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:17:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2021-10-15 19:17:49,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2021-10-15 19:17:49,246 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 41 transitions. [2021-10-15 19:17:49,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 41 transitions. [2021-10-15 19:17:49,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:17:49,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 41 transitions. [2021-10-15 19:17:49,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.25) internal successors, (41), 4 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 19:17:49,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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 19:17:49,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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 19:17:49,248 INFO L186 Difference]: Start difference. First operand has 30 places, 20 transitions, 106 flow. Second operand 4 states and 41 transitions. [2021-10-15 19:17:49,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 16 transitions, 112 flow [2021-10-15 19:17:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 96 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-15 19:17:49,251 INFO L242 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2021-10-15 19:17:49,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2021-10-15 19:17:49,251 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 12 predicate places. [2021-10-15 19:17:49,251 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2021-10-15 19:17:49,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 19:17:49,254 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:17:49,255 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:17:49,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:17:49,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:17:49,488 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:17:49,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:17:49 BoogieIcfgContainer [2021-10-15 19:17:49,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:17:49,492 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:17:49,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:17:49,503 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:17:49,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:17:46" (3/4) ... [2021-10-15 19:17:49,506 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:17:49,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 19:17:49,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:17:49,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:17:49,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:17:49,555 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:17:49,555 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:17:49,557 INFO L168 Benchmark]: Toolchain (without parser) took 3764.40 ms. Allocated memory was 90.2 MB in the beginning and 123.7 MB in the end (delta: 33.6 MB). Free memory was 54.6 MB in the beginning and 62.5 MB in the end (delta: -8.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,558 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 59.7 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:17:49,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.45 ms. Allocated memory was 90.2 MB in the beginning and 123.7 MB in the end (delta: 33.6 MB). Free memory was 54.3 MB in the beginning and 98.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 123.7 MB. Free memory was 98.5 MB in the beginning and 97.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,559 INFO L168 Benchmark]: Boogie Preprocessor took 44.25 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 96.4 MB in the end (delta: 711.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:17:49,560 INFO L168 Benchmark]: RCFGBuilder took 385.62 ms. Allocated memory is still 123.7 MB. Free memory was 96.4 MB in the beginning and 86.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,560 INFO L168 Benchmark]: TraceAbstraction took 2913.57 ms. Allocated memory is still 123.7 MB. Free memory was 85.9 MB in the beginning and 65.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,561 INFO L168 Benchmark]: Witness Printer took 63.94 ms. Allocated memory is still 123.7 MB. Free memory was 65.5 MB in the beginning and 62.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:17:49,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 59.7 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.45 ms. Allocated memory was 90.2 MB in the beginning and 123.7 MB in the end (delta: 33.6 MB). Free memory was 54.3 MB in the beginning and 98.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 123.7 MB. Free memory was 98.5 MB in the beginning and 97.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.25 ms. Allocated memory is still 123.7 MB. Free memory was 97.1 MB in the beginning and 96.4 MB in the end (delta: 711.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 385.62 ms. Allocated memory is still 123.7 MB. Free memory was 96.4 MB in the beginning and 86.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2913.57 ms. Allocated memory is still 123.7 MB. Free memory was 85.9 MB in the beginning and 65.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Witness Printer took 63.94 ms. Allocated memory is still 123.7 MB. Free memory was 65.5 MB in the beginning and 62.5 MB in the end (delta: 2.9 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: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: 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, 17 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2831.4ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 473.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 52.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 13 SDslu, 24 SDs, 0 SdLazy, 94 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 151.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 195.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=3, InterpolantAutomatonStates: 22, 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: 35.3ms SsaConstructionTime, 135.0ms SatisfiabilityAnalysisTime, 757.7ms InterpolantComputationTime, 46 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 171 SizeOfPredicates, 14 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 14/24 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:17:49,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a74f96-aeae-4193-a4b7-a54751dccee0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...