./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.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_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/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_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/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_1067e2ab-8131-4117-a509-e7eaaae32a62/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 588c8ae05db5b455b7a642d0c86b0e222c46f03c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/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_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/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 588c8ae05db5b455b7a642d0c86b0e222c46f03c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:32:00,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:32:00,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:32:00,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:32:00,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:32:00,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:32:00,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:32:00,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:32:00,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:32:00,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:32:00,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:32:00,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:32:00,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:32:00,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:32:00,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:32:00,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:32:00,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:32:00,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:32:00,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:32:00,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:32:00,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:32:00,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:32:00,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:32:00,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:32:00,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:32:00,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:32:00,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:32:00,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:32:00,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:32:00,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:32:00,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:32:00,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:32:00,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:32:00,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:32:00,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:32:00,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:32:00,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:32:00,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:32:00,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:32:00,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:32:00,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:32:00,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:32:00,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:32:00,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:32:00,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:32:00,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:32:00,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:32:00,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:32:00,484 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:32:00,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:32:00,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:32:00,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:32:00,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:32:00,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:32:00,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:32:00,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:32:00,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:32:00,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:32:00,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:32:00,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:32:00,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:32:00,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:32:00,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:32:00,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:32:00,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:00,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:32:00,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:32:00,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:32:00,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:32:00,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:32:00,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:32:00,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:32:00,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:32:00,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:32:00,493 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_1067e2ab-8131-4117-a509-e7eaaae32a62/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2021-10-15 19:32:00,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:32:00,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:32:00,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:32:00,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:32:00,841 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:32:00,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2021-10-15 19:32:00,921 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/88c3aed8c/f5fd568a982f46b68d9b785466dfa306/FLAG2b8f77c83 [2021-10-15 19:32:01,510 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:32:01,511 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2021-10-15 19:32:01,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/88c3aed8c/f5fd568a982f46b68d9b785466dfa306/FLAG2b8f77c83 [2021-10-15 19:32:01,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/88c3aed8c/f5fd568a982f46b68d9b785466dfa306 [2021-10-15 19:32:01,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:32:01,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:32:01,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:01,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:32:01,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:32:01,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:01" (1/1) ... [2021-10-15 19:32:01,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4743018d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:01, skipping insertion in model container [2021-10-15 19:32:01,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:01" (1/1) ... [2021-10-15 19:32:01,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:32:01,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:32:02,163 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_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c[1656,1669] [2021-10-15 19:32:02,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:02,175 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:32:02,204 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_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c[1656,1669] [2021-10-15 19:32:02,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:02,227 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:32:02,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02 WrapperNode [2021-10-15 19:32:02,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:02,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:02,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:32:02,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:32:02,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:02,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:32:02,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:32:02,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:32:02,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:32:02,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:32:02,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:32:02,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:32:02,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (1/1) ... [2021-10-15 19:32:02,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:02,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:32:02,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:32:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:32:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:32:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-15 19:32:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:32:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:32:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:32:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:32:02,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:32:02,888 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-15 19:32:02,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:02 BoogieIcfgContainer [2021-10-15 19:32:02,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:32:02,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:32:02,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:32:02,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:32:02,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:32:01" (1/3) ... [2021-10-15 19:32:02,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db57a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:02, skipping insertion in model container [2021-10-15 19:32:02,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:02" (2/3) ... [2021-10-15 19:32:02,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db57a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:02, skipping insertion in model container [2021-10-15 19:32:02,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:02" (3/3) ... [2021-10-15 19:32:02,906 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2021-10-15 19:32:02,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:32:02,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:32:02,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:32:02,998 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 19:32:02,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:32:03,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 50 transitions, 100 flow [2021-10-15 19:32:03,056 INFO L129 PetriNetUnfolder]: 19/50 cut-off events. [2021-10-15 19:32:03,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:03,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:32:03,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 50 transitions, 100 flow [2021-10-15 19:32:03,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 46 transitions, 92 flow [2021-10-15 19:32:03,095 INFO L129 PetriNetUnfolder]: 13/36 cut-off events. [2021-10-15 19:32:03,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:03,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:03,097 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:03,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-15 19:32:03,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:03,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541556531] [2021-10-15 19:32:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:03,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:03,275 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 19:32:03,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:03,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541556531] [2021-10-15 19:32:03,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541556531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:03,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:03,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:32:03,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799949850] [2021-10-15 19:32:03,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:32:03,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:32:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:32:03,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 50 [2021-10-15 19:32:03,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 46 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 43.5) internal successors, (87), 2 states have internal predecessors, (87), 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 19:32:03,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:03,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 50 [2021-10-15 19:32:03,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:03,332 INFO L129 PetriNetUnfolder]: 12/40 cut-off events. [2021-10-15 19:32:03,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:03,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 40 events. 12/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 6/34 useless extension candidates. Maximal degree in co-relation 40. Up to 5 conditions per place. [2021-10-15 19:32:03,335 INFO L132 encePairwiseOnDemand]: 44/50 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2021-10-15 19:32:03,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:32:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:32:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2021-10-15 19:32:03,350 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.92 [2021-10-15 19:32:03,351 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 92 transitions. [2021-10-15 19:32:03,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 92 transitions. [2021-10-15 19:32:03,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 92 transitions. [2021-10-15 19:32:03,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 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 19:32:03,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 19:32:03,365 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 19:32:03,367 INFO L186 Difference]: Start difference. First operand has 29 places, 46 transitions, 92 flow. Second operand 2 states and 92 transitions. [2021-10-15 19:32:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:03,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:03,374 INFO L242 Difference]: Finished difference. Result has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:03,376 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=40} [2021-10-15 19:32:03,378 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-10-15 19:32:03,378 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:03,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.5) internal successors, (87), 2 states have internal predecessors, (87), 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 19:32:03,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:03,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:03,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:32:03,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-15 19:32:03,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:03,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425867826] [2021-10-15 19:32:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:03,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:03,492 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 19:32:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:03,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425867826] [2021-10-15 19:32:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425867826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:03,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:03,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327116459] [2021-10-15 19:32:03,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:03,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:03,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 40 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:03,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:03,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:03,600 INFO L129 PetriNetUnfolder]: 14/57 cut-off events. [2021-10-15 19:32:03,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:03,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 57 events. 14/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 75. Up to 15 conditions per place. [2021-10-15 19:32:03,604 INFO L132 encePairwiseOnDemand]: 45/50 looper letters, 14 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2021-10-15 19:32:03,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 122 flow [2021-10-15 19:32:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2021-10-15 19:32:03,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.655 [2021-10-15 19:32:03,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:03,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 19:32:03,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,627 INFO L186 Difference]: Start difference. First operand has 30 places, 40 transitions, 80 flow. Second operand 4 states and 131 transitions. [2021-10-15 19:32:03,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 122 flow [2021-10-15 19:32:03,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:03,660 INFO L242 Difference]: Finished difference. Result has 35 places, 42 transitions, 103 flow [2021-10-15 19:32:03,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=42} [2021-10-15 19:32:03,664 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2021-10-15 19:32:03,665 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 42 transitions, 103 flow [2021-10-15 19:32:03,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:03,666 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:03,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:32:03,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-15 19:32:03,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:03,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527484442] [2021-10-15 19:32:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:03,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:03,759 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 19:32:03,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:03,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527484442] [2021-10-15 19:32:03,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527484442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:03,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:03,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:03,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400836509] [2021-10-15 19:32:03,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:03,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:03,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:03,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 42 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:03,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:03,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:03,818 INFO L129 PetriNetUnfolder]: 16/74 cut-off events. [2021-10-15 19:32:03,818 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:32:03,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 74 events. 16/74 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 106. Up to 18 conditions per place. [2021-10-15 19:32:03,820 INFO L132 encePairwiseOnDemand]: 45/50 looper letters, 16 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2021-10-15 19:32:03,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 153 flow [2021-10-15 19:32:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2021-10-15 19:32:03,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.655 [2021-10-15 19:32:03,823 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:03,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 19:32:03,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,826 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,827 INFO L186 Difference]: Start difference. First operand has 35 places, 42 transitions, 103 flow. Second operand 4 states and 131 transitions. [2021-10-15 19:32:03,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 153 flow [2021-10-15 19:32:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:03,830 INFO L242 Difference]: Finished difference. Result has 39 places, 44 transitions, 127 flow [2021-10-15 19:32:03,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=39, PETRI_TRANSITIONS=44} [2021-10-15 19:32:03,831 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2021-10-15 19:32:03,831 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 44 transitions, 127 flow [2021-10-15 19:32:03,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:03,832 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:03,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:32:03,833 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-15 19:32:03,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:03,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760742122] [2021-10-15 19:32:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:03,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:03,883 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 19:32:03,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:03,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760742122] [2021-10-15 19:32:03,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760742122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:03,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:03,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:03,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840561148] [2021-10-15 19:32:03,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:03,888 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:03,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:03,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:03,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:03,939 INFO L129 PetriNetUnfolder]: 18/91 cut-off events. [2021-10-15 19:32:03,940 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 19:32:03,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 91 events. 18/91 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 282 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 138. Up to 17 conditions per place. [2021-10-15 19:32:03,941 INFO L132 encePairwiseOnDemand]: 43/50 looper letters, 14 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2021-10-15 19:32:03,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 185 flow [2021-10-15 19:32:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2021-10-15 19:32:03,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.655 [2021-10-15 19:32:03,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:03,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2021-10-15 19:32:03,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 19:32:03,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:03,948 INFO L186 Difference]: Start difference. First operand has 39 places, 44 transitions, 127 flow. Second operand 4 states and 131 transitions. [2021-10-15 19:32:03,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 185 flow [2021-10-15 19:32:03,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 178 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:03,952 INFO L242 Difference]: Finished difference. Result has 43 places, 46 transitions, 164 flow [2021-10-15 19:32:03,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2021-10-15 19:32:03,953 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2021-10-15 19:32:03,953 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 164 flow [2021-10-15 19:32:03,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:03,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:03,954 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:03,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:32:03,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-10-15 19:32:03,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:03,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720364215] [2021-10-15 19:32:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:03,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:04,005 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 19:32:04,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:04,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720364215] [2021-10-15 19:32:04,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720364215] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:04,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:04,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:04,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214016876] [2021-10-15 19:32:04,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:04,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:04,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:04,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:04,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:04,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:04,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:04,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:04,068 INFO L129 PetriNetUnfolder]: 20/108 cut-off events. [2021-10-15 19:32:04,068 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 19:32:04,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 108 events. 20/108 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 383 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 176. Up to 24 conditions per place. [2021-10-15 19:32:04,070 INFO L132 encePairwiseOnDemand]: 45/50 looper letters, 20 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2021-10-15 19:32:04,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 230 flow [2021-10-15 19:32:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2021-10-15 19:32:04,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.655 [2021-10-15 19:32:04,073 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2021-10-15 19:32:04,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2021-10-15 19:32:04,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:04,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2021-10-15 19:32:04,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 19:32:04,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:04,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:04,077 INFO L186 Difference]: Start difference. First operand has 43 places, 46 transitions, 164 flow. Second operand 4 states and 131 transitions. [2021-10-15 19:32:04,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 230 flow [2021-10-15 19:32:04,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 210 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:04,082 INFO L242 Difference]: Finished difference. Result has 47 places, 48 transitions, 179 flow [2021-10-15 19:32:04,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2021-10-15 19:32:04,083 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2021-10-15 19:32:04,083 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 179 flow [2021-10-15 19:32:04,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 19:32:04,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:04,084 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:32:04,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-15 19:32:04,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:04,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371943694] [2021-10-15 19:32:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:04,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:32:04,113 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:32:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:32:04,157 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:32:04,157 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:32:04,158 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:04,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:32:04,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:32:04,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:32:04 BoogieIcfgContainer [2021-10-15 19:32:04,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:32:04,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:32:04,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:32:04,201 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:32:04,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:02" (3/4) ... [2021-10-15 19:32:04,204 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:32:04,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:32:04,206 INFO L168 Benchmark]: Toolchain (without parser) took 2310.43 ms. Allocated memory is still 138.4 MB. Free memory was 107.4 MB in the beginning and 81.3 MB in the end (delta: 26.1 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,207 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:04,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.00 ms. Allocated memory is still 138.4 MB. Free memory was 107.2 MB in the beginning and 114.5 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.03 ms. Allocated memory is still 138.4 MB. Free memory was 114.5 MB in the beginning and 112.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,209 INFO L168 Benchmark]: Boogie Preprocessor took 32.77 ms. Allocated memory is still 138.4 MB. Free memory was 112.4 MB in the beginning and 111.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,210 INFO L168 Benchmark]: RCFGBuilder took 580.77 ms. Allocated memory is still 138.4 MB. Free memory was 110.8 MB in the beginning and 98.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,211 INFO L168 Benchmark]: TraceAbstraction took 1304.96 ms. Allocated memory is still 138.4 MB. Free memory was 97.7 MB in the beginning and 82.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:04,211 INFO L168 Benchmark]: Witness Printer took 4.02 ms. Allocated memory is still 138.4 MB. Free memory is still 81.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:04,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 331.00 ms. Allocated memory is still 138.4 MB. Free memory was 107.2 MB in the beginning and 114.5 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.03 ms. Allocated memory is still 138.4 MB. Free memory was 114.5 MB in the beginning and 112.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.77 ms. Allocated memory is still 138.4 MB. Free memory was 112.4 MB in the beginning and 111.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 580.77 ms. Allocated memory is still 138.4 MB. Free memory was 110.8 MB in the beginning and 98.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1304.96 ms. Allocated memory is still 138.4 MB. Free memory was 97.7 MB in the beginning and 82.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.02 ms. Allocated memory is still 138.4 MB. Free memory is still 81.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 67. Possible FailurePath: [L66] float x = 0.0f; [L67] float y = -0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 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: 1183.1ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 445.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 90.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 8 SDslu, 47 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=5, InterpolantAutomatonStates: 18, 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: 21.9ms SsaConstructionTime, 136.2ms SatisfiabilityAnalysisTime, 235.6ms InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 71 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:32:04,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:32:06,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:32:06,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:32:06,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:32:06,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:32:06,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:32:06,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:32:06,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:32:06,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:32:06,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:32:06,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:32:06,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:32:06,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:32:06,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:32:06,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:32:06,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:32:06,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:32:06,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:32:06,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:32:06,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:32:06,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:32:06,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:32:06,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:32:06,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:32:06,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:32:06,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:32:06,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:32:06,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:32:06,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:32:06,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:32:06,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:32:06,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:32:06,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:32:06,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:32:06,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:32:06,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:32:06,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:32:06,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:32:06,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:32:06,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:32:06,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:32:06,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:32:06,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:32:06,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:32:06,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:32:06,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:32:06,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:32:06,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:32:06,879 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:32:06,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:32:06,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:32:06,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:32:06,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:32:06,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:32:06,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:32:06,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:32:06,883 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:32:06,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:32:06,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:32:06,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:32:06,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:32:06,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:32:06,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:32:06,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:32:06,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:32:06,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:06,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:32:06,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:32:06,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:32:06,886 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:32:06,887 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:32:06,887 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:32:06,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:32:06,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:32:06,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:32:06,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:32:06,888 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1067e2ab-8131-4117-a509-e7eaaae32a62/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2021-10-15 19:32:07,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:32:07,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:32:07,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:32:07,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:32:07,335 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:32:07,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2021-10-15 19:32:07,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/1af56bfd8/541cd9f352cb488bb2226cc07a831de6/FLAG006fa3697 [2021-10-15 19:32:07,961 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:32:07,962 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2021-10-15 19:32:07,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/1af56bfd8/541cd9f352cb488bb2226cc07a831de6/FLAG006fa3697 [2021-10-15 19:32:08,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/data/1af56bfd8/541cd9f352cb488bb2226cc07a831de6 [2021-10-15 19:32:08,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:32:08,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:32:08,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:08,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:32:08,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:32:08,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4900ab06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08, skipping insertion in model container [2021-10-15 19:32:08,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:32:08,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:32:08,535 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_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c[1656,1669] [2021-10-15 19:32:08,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:08,554 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:32:08,583 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_1067e2ab-8131-4117-a509-e7eaaae32a62/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c[1656,1669] [2021-10-15 19:32:08,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:08,604 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:32:08,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08 WrapperNode [2021-10-15 19:32:08,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:08,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:08,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:32:08,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:32:08,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:08,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:32:08,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:32:08,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:32:08,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:32:08,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:32:08,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:32:08,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:32:08,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (1/1) ... [2021-10-15 19:32:08,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:08,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:32:08,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:32:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:32:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:32:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 19:32:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:32:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:32:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-15 19:32:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:32:09,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:32:09,245 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-15 19:32:09,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:09 BoogieIcfgContainer [2021-10-15 19:32:09,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:32:09,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:32:09,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:32:09,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:32:09,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:32:08" (1/3) ... [2021-10-15 19:32:09,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630bebb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:09, skipping insertion in model container [2021-10-15 19:32:09,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:08" (2/3) ... [2021-10-15 19:32:09,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630bebb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:09, skipping insertion in model container [2021-10-15 19:32:09,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:09" (3/3) ... [2021-10-15 19:32:09,257 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2021-10-15 19:32:09,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:32:09,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:32:09,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:32:09,371 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 19:32:09,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:32:09,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 50 transitions, 100 flow [2021-10-15 19:32:09,414 INFO L129 PetriNetUnfolder]: 19/50 cut-off events. [2021-10-15 19:32:09,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:09,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:32:09,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 50 transitions, 100 flow [2021-10-15 19:32:09,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 46 transitions, 92 flow [2021-10-15 19:32:09,432 INFO L129 PetriNetUnfolder]: 13/36 cut-off events. [2021-10-15 19:32:09,432 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:09,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:09,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:09,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-15 19:32:09,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:09,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338435027] [2021-10-15 19:32:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:09,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:09,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:09,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:32:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 19:32:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:09,607 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 19:32:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:09,644 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 19:32:09,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338435027] [2021-10-15 19:32:09,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338435027] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:09,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:09,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 19:32:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582126289] [2021-10-15 19:32:09,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:32:09,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:32:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:32:09,697 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 50 [2021-10-15 19:32:09,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 46 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 43.5) internal successors, (87), 2 states have internal predecessors, (87), 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 19:32:09,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:09,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 50 [2021-10-15 19:32:09,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:09,744 INFO L129 PetriNetUnfolder]: 12/40 cut-off events. [2021-10-15 19:32:09,744 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:09,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 40 events. 12/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 6/34 useless extension candidates. Maximal degree in co-relation 40. Up to 5 conditions per place. [2021-10-15 19:32:09,747 INFO L132 encePairwiseOnDemand]: 44/50 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2021-10-15 19:32:09,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:32:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:32:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2021-10-15 19:32:09,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.92 [2021-10-15 19:32:09,763 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 92 transitions. [2021-10-15 19:32:09,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 92 transitions. [2021-10-15 19:32:09,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:09,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 92 transitions. [2021-10-15 19:32:09,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 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 19:32:09,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 19:32:09,781 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 19:32:09,783 INFO L186 Difference]: Start difference. First operand has 29 places, 46 transitions, 92 flow. Second operand 2 states and 92 transitions. [2021-10-15 19:32:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:09,796 INFO L242 Difference]: Finished difference. Result has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:09,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=40} [2021-10-15 19:32:09,799 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-10-15 19:32:09,800 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 40 transitions, 80 flow [2021-10-15 19:32:09,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.5) internal successors, (87), 2 states have internal predecessors, (87), 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 19:32:09,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:09,801 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:09,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:10,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:10,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-15 19:32:10,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:10,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430522187] [2021-10-15 19:32:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:10,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:10,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:10,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:32:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:32:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:10,171 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 19:32:10,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:10,221 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 19:32:10,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:10,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430522187] [2021-10-15 19:32:10,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430522187] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:10,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:10,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:32:10,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212840166] [2021-10-15 19:32:10,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:32:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:32:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:32:10,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:10,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 40 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 19:32:10,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:10,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:10,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:10,332 INFO L129 PetriNetUnfolder]: 16/74 cut-off events. [2021-10-15 19:32:10,333 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:10,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 74 events. 16/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 191 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 95. Up to 10 conditions per place. [2021-10-15 19:32:10,334 INFO L132 encePairwiseOnDemand]: 39/50 looper letters, 9 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2021-10-15 19:32:10,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 134 flow [2021-10-15 19:32:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2021-10-15 19:32:10,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2021-10-15 19:32:10,339 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 191 transitions. [2021-10-15 19:32:10,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 191 transitions. [2021-10-15 19:32:10,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:10,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 191 transitions. [2021-10-15 19:32:10,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 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 19:32:10,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 19:32:10,347 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 19:32:10,347 INFO L186 Difference]: Start difference. First operand has 30 places, 40 transitions, 80 flow. Second operand 6 states and 191 transitions. [2021-10-15 19:32:10,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 134 flow [2021-10-15 19:32:10,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:10,352 INFO L242 Difference]: Finished difference. Result has 37 places, 44 transitions, 124 flow [2021-10-15 19:32:10,352 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=37, PETRI_TRANSITIONS=44} [2021-10-15 19:32:10,353 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2021-10-15 19:32:10,353 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 44 transitions, 124 flow [2021-10-15 19:32:10,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 19:32:10,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:10,355 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:10,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:10,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:10,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-15 19:32:10,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:10,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096651899] [2021-10-15 19:32:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:10,571 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:10,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:10,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:10,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:32:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:10,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:32:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:10,786 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 19:32:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:10,898 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 19:32:10,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:10,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096651899] [2021-10-15 19:32:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096651899] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:10,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 19:32:10,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078003942] [2021-10-15 19:32:10,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:10,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:10,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2021-10-15 19:32:10,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 44 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 19:32:10,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:10,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2021-10-15 19:32:10,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:11,005 INFO L129 PetriNetUnfolder]: 11/62 cut-off events. [2021-10-15 19:32:11,006 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 19:32:11,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 62 events. 11/62 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 83. Up to 11 conditions per place. [2021-10-15 19:32:11,009 INFO L132 encePairwiseOnDemand]: 46/50 looper letters, 10 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2021-10-15 19:32:11,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 106 flow [2021-10-15 19:32:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2021-10-15 19:32:11,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.53 [2021-10-15 19:32:11,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 106 transitions. [2021-10-15 19:32:11,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 106 transitions. [2021-10-15 19:32:11,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:11,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 106 transitions. [2021-10-15 19:32:11,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 19:32:11,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:11,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 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 19:32:11,024 INFO L186 Difference]: Start difference. First operand has 37 places, 44 transitions, 124 flow. Second operand 4 states and 106 transitions. [2021-10-15 19:32:11,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 106 flow [2021-10-15 19:32:11,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:32:11,028 INFO L242 Difference]: Finished difference. Result has 32 places, 32 transitions, 73 flow [2021-10-15 19:32:11,029 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2021-10-15 19:32:11,029 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2021-10-15 19:32:11,029 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 73 flow [2021-10-15 19:32:11,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 19:32:11,030 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:11,030 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:11,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:11,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:11,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-15 19:32:11,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:11,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444865419] [2021-10-15 19:32:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:11,247 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:11,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:11,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:32:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:32:11,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:11,401 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 19:32:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:11,459 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 19:32:11,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:11,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444865419] [2021-10-15 19:32:11,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444865419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:11,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:11,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:32:11,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539028696] [2021-10-15 19:32:11,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:32:11,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:11,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:32:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:32:11,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 50 [2021-10-15 19:32:11,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 73 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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 19:32:11,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:11,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 50 [2021-10-15 19:32:11,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:11,538 INFO L129 PetriNetUnfolder]: 9/60 cut-off events. [2021-10-15 19:32:11,538 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:32:11,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 60 events. 9/60 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 82. Up to 7 conditions per place. [2021-10-15 19:32:11,539 INFO L132 encePairwiseOnDemand]: 41/50 looper letters, 6 selfloop transitions, 10 changer transitions 0/36 dead transitions. [2021-10-15 19:32:11,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 113 flow [2021-10-15 19:32:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2021-10-15 19:32:11,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6 [2021-10-15 19:32:11,543 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 180 transitions. [2021-10-15 19:32:11,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 180 transitions. [2021-10-15 19:32:11,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:11,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 180 transitions. [2021-10-15 19:32:11,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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 19:32:11,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 19:32:11,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 19:32:11,547 INFO L186 Difference]: Start difference. First operand has 32 places, 32 transitions, 73 flow. Second operand 6 states and 180 transitions. [2021-10-15 19:32:11,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 113 flow [2021-10-15 19:32:11,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 107 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:32:11,550 INFO L242 Difference]: Finished difference. Result has 36 places, 36 transitions, 107 flow [2021-10-15 19:32:11,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2021-10-15 19:32:11,551 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2021-10-15 19:32:11,551 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 107 flow [2021-10-15 19:32:11,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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 19:32:11,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:11,552 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:11,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:11,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:11,767 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-15 19:32:11,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:11,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028231931] [2021-10-15 19:32:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:11,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:11,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:11,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:32:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:12,061 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 19:32:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:12,199 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 19:32:12,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:12,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028231931] [2021-10-15 19:32:12,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028231931] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:12,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:12,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:32:12,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254906924] [2021-10-15 19:32:12,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:12,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:12,202 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 50 [2021-10-15 19:32:12,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 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 19:32:12,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:12,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 50 [2021-10-15 19:32:12,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:12,225 INFO L129 PetriNetUnfolder]: 6/57 cut-off events. [2021-10-15 19:32:12,225 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:32:12,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 57 events. 6/57 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 82. Up to 6 conditions per place. [2021-10-15 19:32:12,226 INFO L132 encePairwiseOnDemand]: 48/50 looper letters, 3 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2021-10-15 19:32:12,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 113 flow [2021-10-15 19:32:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:32:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:32:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-10-15 19:32:12,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733333333333333 [2021-10-15 19:32:12,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-10-15 19:32:12,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-10-15 19:32:12,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:12,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-10-15 19:32:12,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 19:32:12,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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 19:32:12,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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 19:32:12,233 INFO L186 Difference]: Start difference. First operand has 36 places, 36 transitions, 107 flow. Second operand 3 states and 116 transitions. [2021-10-15 19:32:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 113 flow [2021-10-15 19:32:12,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:12,237 INFO L242 Difference]: Finished difference. Result has 38 places, 35 transitions, 107 flow [2021-10-15 19:32:12,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2021-10-15 19:32:12,238 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2021-10-15 19:32:12,238 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 107 flow [2021-10-15 19:32:12,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 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 19:32:12,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:12,239 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:12,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:12,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-15 19:32:12,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:12,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695106685] [2021-10-15 19:32:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:12,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:12,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:32:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:32:12,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:12,668 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 19:32:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:12,767 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 19:32:12,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:12,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695106685] [2021-10-15 19:32:12,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695106685] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:12,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:12,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-15 19:32:12,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709212169] [2021-10-15 19:32:12,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:32:12,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:32:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:32:12,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 50 [2021-10-15 19:32:12,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 107 flow. Second operand has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 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 19:32:12,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:12,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 50 [2021-10-15 19:32:12,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:12,870 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2021-10-15 19:32:12,870 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:32:12,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 63 events. 3/63 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2021-10-15 19:32:12,871 INFO L132 encePairwiseOnDemand]: 43/50 looper letters, 7 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2021-10-15 19:32:12,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 143 flow [2021-10-15 19:32:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:32:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:32:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2021-10-15 19:32:12,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2021-10-15 19:32:12,875 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 225 transitions. [2021-10-15 19:32:12,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 225 transitions. [2021-10-15 19:32:12,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:12,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 225 transitions. [2021-10-15 19:32:12,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 32.142857142857146) internal successors, (225), 7 states have internal predecessors, (225), 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 19:32:12,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 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 19:32:12,879 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 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 19:32:12,879 INFO L186 Difference]: Start difference. First operand has 38 places, 35 transitions, 107 flow. Second operand 7 states and 225 transitions. [2021-10-15 19:32:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 143 flow [2021-10-15 19:32:12,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:12,885 INFO L242 Difference]: Finished difference. Result has 46 places, 38 transitions, 141 flow [2021-10-15 19:32:12,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2021-10-15 19:32:12,894 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2021-10-15 19:32:12,895 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 141 flow [2021-10-15 19:32:12,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 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 19:32:12,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:12,900 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:12,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-15 19:32:13,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:13,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-15 19:32:13,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:13,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842568880] [2021-10-15 19:32:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:13,115 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:13,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:32:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:32:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:13,337 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 19:32:13,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:13,431 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 19:32:13,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:13,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842568880] [2021-10-15 19:32:13,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842568880] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:13,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:13,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-15 19:32:13,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951710067] [2021-10-15 19:32:13,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:13,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:13,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2021-10-15 19:32:13,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 19:32:13,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:13,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2021-10-15 19:32:13,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:13,482 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2021-10-15 19:32:13,482 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:32:13,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 22 events. 0/22 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:32:13,483 INFO L132 encePairwiseOnDemand]: 46/50 looper letters, 4 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2021-10-15 19:32:13,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 22 transitions, 90 flow [2021-10-15 19:32:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:32:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:32:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2021-10-15 19:32:13,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.432 [2021-10-15 19:32:13,485 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2021-10-15 19:32:13,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2021-10-15 19:32:13,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:13,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2021-10-15 19:32:13,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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 19:32:13,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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 19:32:13,488 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 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 19:32:13,488 INFO L186 Difference]: Start difference. First operand has 46 places, 38 transitions, 141 flow. Second operand 5 states and 108 transitions. [2021-10-15 19:32:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 22 transitions, 90 flow [2021-10-15 19:32:13,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 59 flow, removed 1 selfloop flow, removed 12 redundant places. [2021-10-15 19:32:13,490 INFO L242 Difference]: Finished difference. Result has 31 places, 22 transitions, 51 flow [2021-10-15 19:32:13,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=51, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2021-10-15 19:32:13,490 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2021-10-15 19:32:13,491 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 51 flow [2021-10-15 19:32:13,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 19:32:13,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:13,491 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:13,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:13,692 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:32:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-15 19:32:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:32:13,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891993140] [2021-10-15 19:32:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:13,693 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:32:13,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:32:13,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:32:13,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 19:32:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:13,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:32:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:14,058 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 19:32:14,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:32:14,508 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 19:32:14,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:32:14,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891993140] [2021-10-15 19:32:14,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891993140] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:14,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:14,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-10-15 19:32:14,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339778584] [2021-10-15 19:32:14,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:32:14,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:32:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:32:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:32:14,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2021-10-15 19:32:14,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 51 flow. Second operand has 16 states, 16 states have (on average 29.125) internal successors, (466), 16 states have internal predecessors, (466), 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 19:32:14,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:14,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2021-10-15 19:32:14,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:14,718 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-10-15 19:32:14,718 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 19:32:14,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 20 events. 0/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:32:14,719 INFO L132 encePairwiseOnDemand]: 42/50 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2021-10-15 19:32:14,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 20 transitions, 65 flow [2021-10-15 19:32:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:32:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:32:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2021-10-15 19:32:14,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2021-10-15 19:32:14,721 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 262 transitions. [2021-10-15 19:32:14,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 262 transitions. [2021-10-15 19:32:14,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:14,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 262 transitions. [2021-10-15 19:32:14,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.11111111111111) internal successors, (262), 9 states have internal predecessors, (262), 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 19:32:14,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 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 19:32:14,725 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 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 19:32:14,725 INFO L186 Difference]: Start difference. First operand has 31 places, 22 transitions, 51 flow. Second operand 9 states and 262 transitions. [2021-10-15 19:32:14,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 20 transitions, 65 flow [2021-10-15 19:32:14,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 20 transitions, 60 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:32:14,726 INFO L242 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2021-10-15 19:32:14,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2021-10-15 19:32:14,726 INFO L334 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2021-10-15 19:32:14,726 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2021-10-15 19:32:14,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 29.125) internal successors, (466), 16 states have internal predecessors, (466), 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 19:32:14,730 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:14,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:14,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:32:14,947 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:32:14,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:32:14 BoogieIcfgContainer [2021-10-15 19:32:14,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:32:14,952 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:32:14,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:32:14,952 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:32:14,953 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:09" (3/4) ... [2021-10-15 19:32:14,956 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:32:14,968 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-15 19:32:14,968 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:32:14,969 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 19:32:14,969 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:32:15,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:32:15,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:32:15,054 INFO L168 Benchmark]: Toolchain (without parser) took 6729.39 ms. Allocated memory was 52.4 MB in the beginning and 90.2 MB in the end (delta: 37.7 MB). Free memory was 27.9 MB in the beginning and 35.9 MB in the end (delta: -8.0 MB). Peak memory consumption was 30.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,055 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 52.4 MB. Free memory was 31.6 MB in the beginning and 31.6 MB in the end (delta: 42.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:15,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.82 ms. Allocated memory is still 52.4 MB. Free memory was 27.7 MB in the beginning and 28.0 MB in the end (delta: -294.8 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.09 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 28.0 MB in the beginning and 55.2 MB in the end (delta: -27.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,057 INFO L168 Benchmark]: Boogie Preprocessor took 38.84 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 53.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:15,057 INFO L168 Benchmark]: RCFGBuilder took 500.57 ms. Allocated memory is still 73.4 MB. Free memory was 53.6 MB in the beginning and 40.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,058 INFO L168 Benchmark]: TraceAbstraction took 5701.93 ms. Allocated memory was 73.4 MB in the beginning and 90.2 MB in the end (delta: 16.8 MB). Free memory was 40.1 MB in the beginning and 39.3 MB in the end (delta: 853.6 kB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,058 INFO L168 Benchmark]: Witness Printer took 100.70 ms. Allocated memory is still 90.2 MB. Free memory was 39.3 MB in the beginning and 35.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:15,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 52.4 MB. Free memory was 31.6 MB in the beginning and 31.6 MB in the end (delta: 42.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.82 ms. Allocated memory is still 52.4 MB. Free memory was 27.7 MB in the beginning and 28.0 MB in the end (delta: -294.8 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.09 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 28.0 MB in the beginning and 55.2 MB in the end (delta: -27.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.84 ms. Allocated memory is still 73.4 MB. Free memory was 55.2 MB in the beginning and 53.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 500.57 ms. Allocated memory is still 73.4 MB. Free memory was 53.6 MB in the beginning and 40.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5701.93 ms. Allocated memory was 73.4 MB in the beginning and 90.2 MB in the end (delta: 16.8 MB). Free memory was 40.1 MB in the beginning and 39.3 MB in the end (delta: 853.6 kB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * Witness Printer took 100.70 ms. Allocated memory is still 90.2 MB. Free memory was 39.3 MB in the beginning and 35.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 72]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5587.7ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 878.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43 SDtfs, 73 SDslu, 53 SDs, 0 SdLazy, 149 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 218.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 681.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=6, InterpolantAutomatonStates: 42, 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: 84.7ms SsaConstructionTime, 298.4ms SatisfiabilityAnalysisTime, 1959.7ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 888 SizeOfPredicates, 38 NumberOfNonLiveVariables, 493 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 19:32:15,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1067e2ab-8131-4117-a509-e7eaaae32a62/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...