./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/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 d74df1b7449c0e223ad61b2c5cd0b2b79a63ca78 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:06:32,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:32,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:32,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:32,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:32,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:32,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:32,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:32,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:32,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:32,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:32,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:32,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:32,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:32,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:32,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:32,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:32,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:32,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:32,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:32,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:32,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:32,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:32,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:32,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:32,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:32,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:32,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:32,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:32,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:32,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:32,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:32,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:32,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:32,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:32,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:32,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:32,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:32,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:32,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:32,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:32,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:32,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:32,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:32,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:32,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:32,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:32,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:32,266 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:32,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:32,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:32,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:32,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:32,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:32,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:32,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:32,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:32,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:32,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:32,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:32,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:32,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:32,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:32,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:32,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:32,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:32,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:32,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:32,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:32,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:32,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:32,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:32,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:32,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:32,277 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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d74df1b7449c0e223ad61b2c5cd0b2b79a63ca78 [2021-10-15 19:06:32,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:32,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:32,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:32,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:32,685 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:32,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-10-15 19:06:32,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/data/b2e5c0ac3/0ea420984fa44f98a4030ed245ac96cf/FLAG4319cc3df [2021-10-15 19:06:33,416 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:33,417 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c [2021-10-15 19:06:33,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/data/b2e5c0ac3/0ea420984fa44f98a4030ed245ac96cf/FLAG4319cc3df [2021-10-15 19:06:33,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/data/b2e5c0ac3/0ea420984fa44f98a4030ed245ac96cf [2021-10-15 19:06:33,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:33,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:33,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:33,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:33,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:33,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:33" (1/1) ... [2021-10-15 19:06:33,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e671d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:33, skipping insertion in model container [2021-10-15 19:06:33,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:33" (1/1) ... [2021-10-15 19:06:33,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:33,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:34,020 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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c[458,471] [2021-10-15 19:06:34,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:34,064 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:34,080 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_c49beafa-24fa-43b2-ad8a-d5af14e8e059/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound2.c[458,471] [2021-10-15 19:06:34,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:34,106 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:34,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34 WrapperNode [2021-10-15 19:06:34,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:34,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:34,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:34,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:34,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:34,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:34,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:34,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:34,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:34,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:34,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:34,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:34,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (1/1) ... [2021-10-15 19:06:34,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:34,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:34,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:34,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:34,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:34,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:34,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:34,581 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 19:06:34,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:34 BoogieIcfgContainer [2021-10-15 19:06:34,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:34,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:34,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:34,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:34,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:33" (1/3) ... [2021-10-15 19:06:34,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580d123e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:34, skipping insertion in model container [2021-10-15 19:06:34,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:34" (2/3) ... [2021-10-15 19:06:34,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580d123e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:34, skipping insertion in model container [2021-10-15 19:06:34,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:34" (3/3) ... [2021-10-15 19:06:34,606 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound2.c [2021-10-15 19:06:34,613 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:34,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-15 19:06:34,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:34,700 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 19:06:34,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 19:06:34,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 27 transitions, 54 flow [2021-10-15 19:06:34,755 INFO L129 PetriNetUnfolder]: 7/27 cut-off events. [2021-10-15 19:06:34,761 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:34,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 27 events. 7/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:06:34,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 27 transitions, 54 flow [2021-10-15 19:06:34,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 22 transitions, 44 flow [2021-10-15 19:06:34,778 INFO L129 PetriNetUnfolder]: 5/14 cut-off events. [2021-10-15 19:06:34,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:34,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:34,779 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:34,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-15 19:06:34,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:34,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070271824] [2021-10-15 19:06:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:34,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:34,927 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:34,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758007887] [2021-10-15 19:06:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:34,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:34,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:34,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:06:35,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:35,298 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 19:06:35,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:35,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070271824] [2021-10-15 19:06:35,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:35,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758007887] [2021-10-15 19:06:35,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758007887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:35,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:35,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:06:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527555493] [2021-10-15 19:06:35,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:35,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:35,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:06:35,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 22 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 19:06:35,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:35,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:06:35,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:36,113 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-10-15 19:06:36,113 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:36,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-15 19:06:36,115 INFO L132 encePairwiseOnDemand]: 16/27 looper letters, 11 selfloop transitions, 4 changer transitions 3/24 dead transitions. [2021-10-15 19:06:36,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 84 flow [2021-10-15 19:06:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-10-15 19:06:36,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2021-10-15 19:06:36,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-10-15 19:06:36,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-10-15 19:06:36,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:36,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-10-15 19:06:36,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 19:06:36,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 19:06:36,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 19:06:36,148 INFO L186 Difference]: Start difference. First operand has 17 places, 22 transitions, 44 flow. Second operand 5 states and 75 transitions. [2021-10-15 19:06:36,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 84 flow [2021-10-15 19:06:36,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:36,155 INFO L242 Difference]: Finished difference. Result has 22 places, 20 transitions, 60 flow [2021-10-15 19:06:36,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2021-10-15 19:06:36,159 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 5 predicate places. [2021-10-15 19:06:36,159 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 60 flow [2021-10-15 19:06:36,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 19:06:36,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:36,160 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:36,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:06:36,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-15 19:06:36,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-10-15 19:06:36,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:36,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928321673] [2021-10-15 19:06:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:36,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:36,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:36,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758102055] [2021-10-15 19:06:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:36,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:36,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:06:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:36,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928321673] [2021-10-15 19:06:36,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758102055] [2021-10-15 19:06:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758102055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:36,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:36,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:06:36,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357366330] [2021-10-15 19:06:36,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:36,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:36,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:06:36,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 19:06:36,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:36,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:06:36,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:36,803 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-10-15 19:06:36,804 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:06:36,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 34 events. 1/34 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 2/36 useless extension candidates. Maximal degree in co-relation 3. Up to 12 conditions per place. [2021-10-15 19:06:36,806 INFO L132 encePairwiseOnDemand]: 20/27 looper letters, 14 selfloop transitions, 6 changer transitions 5/31 dead transitions. [2021-10-15 19:06:36,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 138 flow [2021-10-15 19:06:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2021-10-15 19:06:36,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2021-10-15 19:06:36,815 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2021-10-15 19:06:36,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2021-10-15 19:06:36,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:36,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2021-10-15 19:06:36,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 19:06:36,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:36,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:36,826 INFO L186 Difference]: Start difference. First operand has 22 places, 20 transitions, 60 flow. Second operand 7 states and 90 transitions. [2021-10-15 19:06:36,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 138 flow [2021-10-15 19:06:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:36,835 INFO L242 Difference]: Finished difference. Result has 31 places, 23 transitions, 100 flow [2021-10-15 19:06:36,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2021-10-15 19:06:36,836 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 14 predicate places. [2021-10-15 19:06:36,837 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 100 flow [2021-10-15 19:06:36,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 19:06:36,838 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:36,838 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:36,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:37,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:37,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:37,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-10-15 19:06:37,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:37,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337760535] [2021-10-15 19:06:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:37,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:37,087 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:37,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176462513] [2021-10-15 19:06:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:37,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:37,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:37,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:37,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:06:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:06:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:37,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:37,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337760535] [2021-10-15 19:06:37,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:37,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176462513] [2021-10-15 19:06:37,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176462513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:37,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:37,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:06:37,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28170882] [2021-10-15 19:06:37,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:06:37,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:06:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:06:37,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:06:37,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 19:06:37,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:37,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:06:37,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:37,963 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-10-15 19:06:37,963 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:06:37,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 31 events. 1/31 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 69. Up to 13 conditions per place. [2021-10-15 19:06:37,964 INFO L132 encePairwiseOnDemand]: 19/27 looper letters, 13 selfloop transitions, 6 changer transitions 7/31 dead transitions. [2021-10-15 19:06:37,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 172 flow [2021-10-15 19:06:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:06:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:06:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2021-10-15 19:06:37,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:06:37,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 99 transitions. [2021-10-15 19:06:37,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 99 transitions. [2021-10-15 19:06:37,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:37,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 99 transitions. [2021-10-15 19:06:37,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 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 19:06:37,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 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 19:06:37,970 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 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 19:06:37,971 INFO L186 Difference]: Start difference. First operand has 31 places, 23 transitions, 100 flow. Second operand 9 states and 99 transitions. [2021-10-15 19:06:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 172 flow [2021-10-15 19:06:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 160 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:37,975 INFO L242 Difference]: Finished difference. Result has 41 places, 23 transitions, 112 flow [2021-10-15 19:06:37,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2021-10-15 19:06:37,976 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 24 predicate places. [2021-10-15 19:06:37,976 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 112 flow [2021-10-15 19:06:37,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 19:06:37,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:37,977 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:38,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:38,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:38,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-10-15 19:06:38,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:38,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135238724] [2021-10-15 19:06:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:38,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:38,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:38,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019615331] [2021-10-15 19:06:38,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:38,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:38,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:38,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:38,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:06:38,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:06:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:38,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:38,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135238724] [2021-10-15 19:06:38,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:38,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019615331] [2021-10-15 19:06:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019615331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:38,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:06:38,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472709506] [2021-10-15 19:06:38,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:38,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:38,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:06:38,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 19:06:38,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:38,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:06:38,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:38,668 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-10-15 19:06:38,668 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-10-15 19:06:38,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 34 events. 1/34 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 37 event pairs, 0 based on Foata normal form. 2/36 useless extension candidates. Maximal degree in co-relation 96. Up to 12 conditions per place. [2021-10-15 19:06:38,669 INFO L132 encePairwiseOnDemand]: 20/27 looper letters, 16 selfloop transitions, 7 changer transitions 2/31 dead transitions. [2021-10-15 19:06:38,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 202 flow [2021-10-15 19:06:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2021-10-15 19:06:38,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2021-10-15 19:06:38,672 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 99 transitions. [2021-10-15 19:06:38,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 99 transitions. [2021-10-15 19:06:38,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:38,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 99 transitions. [2021-10-15 19:06:38,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 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 19:06:38,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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 19:06:38,676 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 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 19:06:38,677 INFO L186 Difference]: Start difference. First operand has 41 places, 23 transitions, 112 flow. Second operand 8 states and 99 transitions. [2021-10-15 19:06:38,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 202 flow [2021-10-15 19:06:38,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 170 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-15 19:06:38,681 INFO L242 Difference]: Finished difference. Result has 40 places, 26 transitions, 138 flow [2021-10-15 19:06:38,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=138, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2021-10-15 19:06:38,682 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 23 predicate places. [2021-10-15 19:06:38,682 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 138 flow [2021-10-15 19:06:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 19:06:38,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:38,683 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:38,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:38,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1496575115, now seen corresponding path program 2 times [2021-10-15 19:06:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:38,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583286039] [2021-10-15 19:06:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:38,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:38,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:38,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303708629] [2021-10-15 19:06:38,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:38,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:38,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:06:39,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:06:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:39,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:39,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583286039] [2021-10-15 19:06:39,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:39,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303708629] [2021-10-15 19:06:39,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303708629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:39,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:39,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:06:39,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364586850] [2021-10-15 19:06:39,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:39,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:39,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:06:39,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 19:06:39,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:39,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:06:39,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:39,488 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-10-15 19:06:39,488 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 19:06:39,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 31 events. 1/31 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 90. Up to 14 conditions per place. [2021-10-15 19:06:39,489 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 18 selfloop transitions, 4 changer transitions 4/31 dead transitions. [2021-10-15 19:06:39,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 208 flow [2021-10-15 19:06:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2021-10-15 19:06:39,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2021-10-15 19:06:39,491 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2021-10-15 19:06:39,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2021-10-15 19:06:39,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:39,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2021-10-15 19:06:39,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 19:06:39,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:39,495 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:39,495 INFO L186 Difference]: Start difference. First operand has 40 places, 26 transitions, 138 flow. Second operand 7 states and 82 transitions. [2021-10-15 19:06:39,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 208 flow [2021-10-15 19:06:39,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 188 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-10-15 19:06:39,500 INFO L242 Difference]: Finished difference. Result has 44 places, 25 transitions, 126 flow [2021-10-15 19:06:39,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2021-10-15 19:06:39,501 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 27 predicate places. [2021-10-15 19:06:39,501 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 126 flow [2021-10-15 19:06:39,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 19:06:39,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:39,502 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:39,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:39,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:39,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-10-15 19:06:39,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:39,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638681010] [2021-10-15 19:06:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:39,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:39,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:39,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555893290] [2021-10-15 19:06:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:39,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:39,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:06:39,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:06:39,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:06:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:06:40,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:40,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638681010] [2021-10-15 19:06:40,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:40,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555893290] [2021-10-15 19:06:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555893290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:40,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:40,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:06:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908083162] [2021-10-15 19:06:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:40,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:40,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:06:40,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 19:06:40,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:40,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:06:40,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:40,229 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-10-15 19:06:40,230 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 19:06:40,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 24 events. 1/24 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 2/26 useless extension candidates. Maximal degree in co-relation 79. Up to 14 conditions per place. [2021-10-15 19:06:40,231 INFO L132 encePairwiseOnDemand]: 21/27 looper letters, 12 selfloop transitions, 3 changer transitions 2/21 dead transitions. [2021-10-15 19:06:40,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 21 transitions, 146 flow [2021-10-15 19:06:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2021-10-15 19:06:40,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2021-10-15 19:06:40,233 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2021-10-15 19:06:40,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2021-10-15 19:06:40,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:40,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2021-10-15 19:06:40,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 19:06:40,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 19:06:40,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 19:06:40,236 INFO L186 Difference]: Start difference. First operand has 44 places, 25 transitions, 126 flow. Second operand 4 states and 48 transitions. [2021-10-15 19:06:40,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 21 transitions, 146 flow [2021-10-15 19:06:40,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 21 transitions, 132 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-10-15 19:06:40,240 INFO L242 Difference]: Finished difference. Result has 34 places, 19 transitions, 100 flow [2021-10-15 19:06:40,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2021-10-15 19:06:40,240 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 17 predicate places. [2021-10-15 19:06:40,240 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 100 flow [2021-10-15 19:06:40,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 19:06:40,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:40,241 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:40,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:40,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:40,462 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1490885148, now seen corresponding path program 3 times [2021-10-15 19:06:40,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:40,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605300314] [2021-10-15 19:06:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:40,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:40,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:40,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87045080] [2021-10-15 19:06:40,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:40,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:40,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:06:40,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:06:40,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:40,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:06:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:40,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:40,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605300314] [2021-10-15 19:06:40,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:40,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87045080] [2021-10-15 19:06:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87045080] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:40,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:40,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:06:40,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830705236] [2021-10-15 19:06:40,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:40,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:40,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 27 [2021-10-15 19:06:40,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 19:06:40,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:40,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 27 [2021-10-15 19:06:40,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:40,995 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-10-15 19:06:40,996 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-10-15 19:06:40,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 13 events. 0/13 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-10-15 19:06:40,996 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 19:06:40,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 12 transitions, 75 flow [2021-10-15 19:06:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2021-10-15 19:06:40,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2021-10-15 19:06:40,998 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 112 transitions. [2021-10-15 19:06:40,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 112 transitions. [2021-10-15 19:06:40,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:40,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 112 transitions. [2021-10-15 19:06:40,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:41,000 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 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 19:06:41,001 INFO L186 Difference]: Start difference. First operand has 34 places, 19 transitions, 100 flow. Second operand 7 states and 112 transitions. [2021-10-15 19:06:41,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 12 transitions, 75 flow [2021-10-15 19:06:41,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 12 transitions, 55 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-10-15 19:06:41,002 INFO L242 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2021-10-15 19:06:41,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2021-10-15 19:06:41,003 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 8 predicate places. [2021-10-15 19:06:41,003 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2021-10-15 19:06:41,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 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 19:06:41,006 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:41,007 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:41,007 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:41,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:41,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:06:41,240 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:41,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:41 BoogieIcfgContainer [2021-10-15 19:06:41,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:41,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:41,254 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:41,254 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:41,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:34" (3/4) ... [2021-10-15 19:06:41,259 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:06:41,274 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 19:06:41,275 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:06:41,275 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:41,275 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:41,333 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:41,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:41,335 INFO L168 Benchmark]: Toolchain (without parser) took 7568.42 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 77.0 MB in the beginning and 107.4 MB in the end (delta: -30.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,336 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 115.3 MB. Free memory is still 93.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:41,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.07 ms. Allocated memory is still 115.3 MB. Free memory was 76.8 MB in the beginning and 89.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.48 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 87.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,339 INFO L168 Benchmark]: Boogie Preprocessor took 26.77 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 86.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,339 INFO L168 Benchmark]: RCFGBuilder took 401.66 ms. Allocated memory is still 115.3 MB. Free memory was 86.5 MB in the beginning and 76.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,340 INFO L168 Benchmark]: TraceAbstraction took 6667.06 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 76.5 MB in the beginning and 110.2 MB in the end (delta: -33.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,340 INFO L168 Benchmark]: Witness Printer took 80.19 ms. Allocated memory is still 153.1 MB. Free memory was 110.2 MB in the beginning and 107.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:41,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 115.3 MB. Free memory is still 93.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.07 ms. Allocated memory is still 115.3 MB. Free memory was 76.8 MB in the beginning and 89.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.48 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 87.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.77 ms. Allocated memory is still 115.3 MB. Free memory was 87.6 MB in the beginning and 86.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 401.66 ms. Allocated memory is still 115.3 MB. Free memory was 86.5 MB in the beginning and 76.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6667.06 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 76.5 MB in the beginning and 110.2 MB in the end (delta: -33.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Witness Printer took 80.19 ms. Allocated memory is still 153.1 MB. Free memory was 110.2 MB in the beginning and 107.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6554.1ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 1939.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 71.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 52 SDslu, 77 SDs, 0 SdLazy, 263 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1132.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 637.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=4, InterpolantAutomatonStates: 47, 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: 81.9ms SsaConstructionTime, 220.6ms SatisfiabilityAnalysisTime, 1791.3ms InterpolantComputationTime, 94 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 527 SizeOfPredicates, 27 NumberOfNonLiveVariables, 521 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 32/54 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:06:41,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49beafa-24fa-43b2-ad8a-d5af14e8e059/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...