./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label52.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_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/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_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/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_7fd4433a-afae-4250-9655-d850bba583d8/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 2a6f9dd10b9200c61377ed7a907ef50ee4969a78 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:56:52,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:56:52,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:56:52,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:56:52,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:56:52,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:56:52,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:56:52,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:56:52,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:56:52,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:56:52,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:56:52,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:56:52,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:56:52,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:56:52,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:56:52,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:56:52,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:56:52,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:56:52,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:56:52,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:56:52,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:56:52,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:56:52,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:56:52,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:56:52,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:56:52,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:56:52,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:56:52,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:56:52,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:56:52,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:56:52,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:56:52,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:56:52,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:56:52,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:56:52,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:56:52,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:56:52,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:56:52,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:56:52,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:56:52,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:56:52,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:56:52,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:56:52,920 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:56:52,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:56:52,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:56:52,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:56:52,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:56:52,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:56:52,934 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:56:52,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:56:52,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:56:52,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:56:52,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:56:52,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:56:52,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:56:52,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:56:52,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:56:52,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:56:52,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:56:52,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:56:52,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:56:52,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:56:52,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:56:52,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:56:52,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:56:52,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:56:52,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:56:52,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:56:52,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:56:52,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:56:52,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:56:52,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:56:52,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:56:52,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:56:52,944 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_7fd4433a-afae-4250-9655-d850bba583d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a6f9dd10b9200c61377ed7a907ef50ee4969a78 [2021-10-15 19:56:53,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:56:53,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:56:53,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:56:53,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:56:53,321 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:56:53,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label52.c [2021-10-15 19:56:53,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/data/ca5be4dee/50b1106758e1475482f64ca8cf73a622/FLAG93be0b603 [2021-10-15 19:56:54,236 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:56:54,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/sv-benchmarks/c/eca-rers2012/Problem01_label52.c [2021-10-15 19:56:54,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/data/ca5be4dee/50b1106758e1475482f64ca8cf73a622/FLAG93be0b603 [2021-10-15 19:56:54,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/data/ca5be4dee/50b1106758e1475482f64ca8cf73a622 [2021-10-15 19:56:54,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:56:54,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:56:54,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:56:54,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:56:54,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:56:54,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:56:54" (1/1) ... [2021-10-15 19:56:54,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e4645e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:54, skipping insertion in model container [2021-10-15 19:56:54,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:56:54" (1/1) ... [2021-10-15 19:56:54,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:56:54,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:56:54,969 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_7fd4433a-afae-4250-9655-d850bba583d8/sv-benchmarks/c/eca-rers2012/Problem01_label52.c[21213,21226] [2021-10-15 19:56:55,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:56:55,017 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:56:55,138 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_7fd4433a-afae-4250-9655-d850bba583d8/sv-benchmarks/c/eca-rers2012/Problem01_label52.c[21213,21226] [2021-10-15 19:56:55,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:56:55,168 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:56:55,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55 WrapperNode [2021-10-15 19:56:55,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:56:55,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:56:55,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:56:55,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:56:55,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:56:55,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:56:55,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:56:55,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:56:55,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:56:55,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:56:55,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:56:55,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:56:55,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (1/1) ... [2021-10-15 19:56:55,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:56:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:56:55,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:56:55,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:56:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:56:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:56:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:56:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:56:57,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:56:57,011 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:56:57,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:56:57 BoogieIcfgContainer [2021-10-15 19:56:57,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:56:57,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:56:57,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:56:57,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:56:57,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:56:54" (1/3) ... [2021-10-15 19:56:57,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a55888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:56:57, skipping insertion in model container [2021-10-15 19:56:57,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:56:55" (2/3) ... [2021-10-15 19:56:57,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a55888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:56:57, skipping insertion in model container [2021-10-15 19:56:57,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:56:57" (3/3) ... [2021-10-15 19:56:57,029 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2021-10-15 19:56:57,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:56:57,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:56:57,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:56:57,111 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 19:56:57,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:56:57,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:56:57,285 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:56:57,285 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:56:57,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 327 events. 130/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 203 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-10-15 19:56:57,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:56:57,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:56:57,396 INFO L129 PetriNetUnfolder]: 121/303 cut-off events. [2021-10-15 19:56:57,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:56:57,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:56:57,397 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:56:57,398 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:56:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:56:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2069223047, now seen corresponding path program 1 times [2021-10-15 19:56:57,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:56:57,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64845788] [2021-10-15 19:56:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:56:57,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:56:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:56:57,964 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 19:56:57,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:56:57,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64845788] [2021-10-15 19:56:57,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64845788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:56:57,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:56:57,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:56:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959352954] [2021-10-15 19:56:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:56:57,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:56:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:56:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:56:58,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:56:58,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 19:56:58,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:56:58,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:56:58,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:56:58,952 INFO L129 PetriNetUnfolder]: 146/471 cut-off events. [2021-10-15 19:56:58,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:56:58,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 471 events. 146/471 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 647 event pairs, 0 based on Foata normal form. 61/326 useless extension candidates. Maximal degree in co-relation 1. Up to 258 conditions per place. [2021-10-15 19:56:58,959 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 307 selfloop transitions, 63 changer transitions 91/467 dead transitions. [2021-10-15 19:56:58,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 467 transitions, 1856 flow [2021-10-15 19:56:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:56:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:56:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2021-10-15 19:56:58,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6085626911314985 [2021-10-15 19:56:58,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2021-10-15 19:56:58,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2021-10-15 19:56:58,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:56:58,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2021-10-15 19:56:58,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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 19:56:59,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:56:59,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:56:59,005 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 3 states and 597 transitions. [2021-10-15 19:56:59,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 467 transitions, 1856 flow [2021-10-15 19:56:59,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 467 transitions, 1856 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:56:59,029 INFO L242 Difference]: Finished difference. Result has 199 places, 249 transitions, 856 flow [2021-10-15 19:56:59,032 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=856, PETRI_PLACES=199, PETRI_TRANSITIONS=249} [2021-10-15 19:56:59,033 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 4 predicate places. [2021-10-15 19:56:59,033 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 249 transitions, 856 flow [2021-10-15 19:56:59,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 19:56:59,033 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:56:59,034 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:56:59,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:56:59,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:56:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:56:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1670609503, now seen corresponding path program 1 times [2021-10-15 19:56:59,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:56:59,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669988505] [2021-10-15 19:56:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:56:59,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:56:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:56:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:56:59,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:56:59,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669988505] [2021-10-15 19:56:59,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669988505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:56:59,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:56:59,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:56:59,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929530441] [2021-10-15 19:56:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:56:59,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:56:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:56:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:56:59,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:56:59,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 249 transitions, 856 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 19:56:59,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:56:59,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:56:59,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:56:59,880 INFO L129 PetriNetUnfolder]: 194/721 cut-off events. [2021-10-15 19:56:59,881 INFO L130 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2021-10-15 19:56:59,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 721 events. 194/721 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1596 event pairs, 0 based on Foata normal form. 36/757 useless extension candidates. Maximal degree in co-relation 655. Up to 433 conditions per place. [2021-10-15 19:56:59,891 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 345 selfloop transitions, 104 changer transitions 0/455 dead transitions. [2021-10-15 19:56:59,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 455 transitions, 2412 flow [2021-10-15 19:56:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:56:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:56:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:56:59,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:56:59,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:56:59,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:56:59,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:56:59,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:56:59,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 19:56:59,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:56:59,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:56:59,907 INFO L186 Difference]: Start difference. First operand has 199 places, 249 transitions, 856 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:56:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 455 transitions, 2412 flow [2021-10-15 19:56:59,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 455 transitions, 2198 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:56:59,951 INFO L242 Difference]: Finished difference. Result has 141 places, 328 transitions, 1644 flow [2021-10-15 19:56:59,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1644, PETRI_PLACES=141, PETRI_TRANSITIONS=328} [2021-10-15 19:56:59,960 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -54 predicate places. [2021-10-15 19:56:59,960 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 328 transitions, 1644 flow [2021-10-15 19:56:59,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 19:56:59,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:56:59,961 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:56:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:56:59,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:56:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:56:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2129405611, now seen corresponding path program 1 times [2021-10-15 19:56:59,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:56:59,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493963585] [2021-10-15 19:56:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:56:59,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:00,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:00,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493963585] [2021-10-15 19:57:00,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493963585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:00,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66600535] [2021-10-15 19:57:00,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:00,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:00,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:00,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 328 transitions, 1644 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 19:57:00,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:00,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:00,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:00,978 INFO L129 PetriNetUnfolder]: 314/1234 cut-off events. [2021-10-15 19:57:00,978 INFO L130 PetriNetUnfolder]: For 687/687 co-relation queries the response was YES. [2021-10-15 19:57:00,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 1234 events. 314/1234 cut-off events. For 687/687 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4145 event pairs, 0 based on Foata normal form. 26/1260 useless extension candidates. Maximal degree in co-relation 1224. Up to 771 conditions per place. [2021-10-15 19:57:00,989 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 418 selfloop transitions, 151 changer transitions 0/575 dead transitions. [2021-10-15 19:57:00,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 575 transitions, 3854 flow [2021-10-15 19:57:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:57:00,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:57:00,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:57:00,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:57:00,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:00,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:57:00,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 19:57:01,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:01,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:01,001 INFO L186 Difference]: Start difference. First operand has 141 places, 328 transitions, 1644 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:57:01,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 575 transitions, 3854 flow [2021-10-15 19:57:01,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 575 transitions, 3548 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:01,035 INFO L242 Difference]: Finished difference. Result has 143 places, 448 transitions, 3022 flow [2021-10-15 19:57:01,036 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3022, PETRI_PLACES=143, PETRI_TRANSITIONS=448} [2021-10-15 19:57:01,036 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -52 predicate places. [2021-10-15 19:57:01,036 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 448 transitions, 3022 flow [2021-10-15 19:57:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 19:57:01,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:01,037 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:01,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:57:01,038 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 703724998, now seen corresponding path program 1 times [2021-10-15 19:57:01,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:01,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368801983] [2021-10-15 19:57:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:01,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:01,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:01,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368801983] [2021-10-15 19:57:01,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368801983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:01,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:01,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:01,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195974386] [2021-10-15 19:57:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:01,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:01,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 448 transitions, 3022 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 19:57:01,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:01,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:01,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:02,300 INFO L129 PetriNetUnfolder]: 362/1675 cut-off events. [2021-10-15 19:57:02,300 INFO L130 PetriNetUnfolder]: For 1694/1694 co-relation queries the response was YES. [2021-10-15 19:57:02,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 1675 events. 362/1675 cut-off events. For 1694/1694 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6776 event pairs, 0 based on Foata normal form. 48/1723 useless extension candidates. Maximal degree in co-relation 2343. Up to 1116 conditions per place. [2021-10-15 19:57:02,316 INFO L132 encePairwiseOnDemand]: 270/327 looper letters, 466 selfloop transitions, 151 changer transitions 0/623 dead transitions. [2021-10-15 19:57:02,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 623 transitions, 4894 flow [2021-10-15 19:57:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2021-10-15 19:57:02,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40468909276248727 [2021-10-15 19:57:02,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2021-10-15 19:57:02,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2021-10-15 19:57:02,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:02,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2021-10-15 19:57:02,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 19:57:02,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:02,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:02,328 INFO L186 Difference]: Start difference. First operand has 143 places, 448 transitions, 3022 flow. Second operand 3 states and 397 transitions. [2021-10-15 19:57:02,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 623 transitions, 4894 flow [2021-10-15 19:57:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 623 transitions, 4556 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:02,370 INFO L242 Difference]: Finished difference. Result has 145 places, 496 transitions, 3828 flow [2021-10-15 19:57:02,371 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3828, PETRI_PLACES=145, PETRI_TRANSITIONS=496} [2021-10-15 19:57:02,372 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -50 predicate places. [2021-10-15 19:57:02,372 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 496 transitions, 3828 flow [2021-10-15 19:57:02,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 19:57:02,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:02,373 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:02,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:57:02,374 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1507135562, now seen corresponding path program 1 times [2021-10-15 19:57:02,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:02,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056496542] [2021-10-15 19:57:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:02,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:57:02,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:02,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056496542] [2021-10-15 19:57:02,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056496542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:02,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:02,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:02,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735675137] [2021-10-15 19:57:02,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:02,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:02,477 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:02,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 496 transitions, 3828 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 19:57:02,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:02,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:02,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:03,522 INFO L129 PetriNetUnfolder]: 387/1962 cut-off events. [2021-10-15 19:57:03,522 INFO L130 PetriNetUnfolder]: For 2783/2783 co-relation queries the response was YES. [2021-10-15 19:57:03,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5394 conditions, 1962 events. 387/1962 cut-off events. For 2783/2783 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8988 event pairs, 0 based on Foata normal form. 66/2028 useless extension candidates. Maximal degree in co-relation 1310. Up to 1186 conditions per place. [2021-10-15 19:57:03,538 INFO L132 encePairwiseOnDemand]: 275/327 looper letters, 452 selfloop transitions, 190 changer transitions 0/648 dead transitions. [2021-10-15 19:57:03,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 648 transitions, 5606 flow [2021-10-15 19:57:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2021-10-15 19:57:03,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2021-10-15 19:57:03,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2021-10-15 19:57:03,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2021-10-15 19:57:03,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:03,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2021-10-15 19:57:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 19:57:03,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:03,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:03,548 INFO L186 Difference]: Start difference. First operand has 145 places, 496 transitions, 3828 flow. Second operand 3 states and 398 transitions. [2021-10-15 19:57:03,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 648 transitions, 5606 flow [2021-10-15 19:57:03,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 648 transitions, 5242 flow, removed 19 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:03,591 INFO L242 Difference]: Finished difference. Result has 147 places, 521 transitions, 4592 flow [2021-10-15 19:57:03,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4592, PETRI_PLACES=147, PETRI_TRANSITIONS=521} [2021-10-15 19:57:03,592 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:57:03,592 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 521 transitions, 4592 flow [2021-10-15 19:57:03,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 19:57:03,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:03,593 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:03,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:57:03,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1322844814, now seen corresponding path program 1 times [2021-10-15 19:57:03,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:03,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803731086] [2021-10-15 19:57:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:03,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:03,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:03,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803731086] [2021-10-15 19:57:03,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803731086] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:03,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:03,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:03,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890042120] [2021-10-15 19:57:03,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:03,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:03,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:03,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:03,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:03,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 521 transitions, 4592 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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 19:57:03,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:03,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:03,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:05,344 INFO L129 PetriNetUnfolder]: 411/2379 cut-off events. [2021-10-15 19:57:05,344 INFO L130 PetriNetUnfolder]: For 3930/3930 co-relation queries the response was YES. [2021-10-15 19:57:05,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6564 conditions, 2379 events. 411/2379 cut-off events. For 3930/3930 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11287 event pairs, 0 based on Foata normal form. 30/2409 useless extension candidates. Maximal degree in co-relation 3207. Up to 919 conditions per place. [2021-10-15 19:57:05,366 INFO L132 encePairwiseOnDemand]: 264/327 looper letters, 518 selfloop transitions, 275 changer transitions 0/799 dead transitions. [2021-10-15 19:57:05,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 799 transitions, 6904 flow [2021-10-15 19:57:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:57:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:57:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2021-10-15 19:57:05,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4350152905198777 [2021-10-15 19:57:05,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2021-10-15 19:57:05,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2021-10-15 19:57:05,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:05,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2021-10-15 19:57:05,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 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 19:57:05,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 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 19:57:05,381 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 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 19:57:05,381 INFO L186 Difference]: Start difference. First operand has 147 places, 521 transitions, 4592 flow. Second operand 4 states and 569 transitions. [2021-10-15 19:57:05,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 799 transitions, 6904 flow [2021-10-15 19:57:05,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 799 transitions, 6510 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:05,437 INFO L242 Difference]: Finished difference. Result has 150 places, 545 transitions, 5340 flow [2021-10-15 19:57:05,438 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5340, PETRI_PLACES=150, PETRI_TRANSITIONS=545} [2021-10-15 19:57:05,438 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -45 predicate places. [2021-10-15 19:57:05,438 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 545 transitions, 5340 flow [2021-10-15 19:57:05,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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 19:57:05,439 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:05,440 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:05,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:57:05,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -879807985, now seen corresponding path program 1 times [2021-10-15 19:57:05,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:05,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43446084] [2021-10-15 19:57:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:05,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:57:05,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:05,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43446084] [2021-10-15 19:57:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43446084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:05,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:05,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:05,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423903433] [2021-10-15 19:57:05,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:05,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:05,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:05,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 545 transitions, 5340 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:05,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:05,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:05,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:07,103 INFO L129 PetriNetUnfolder]: 469/2699 cut-off events. [2021-10-15 19:57:07,104 INFO L130 PetriNetUnfolder]: For 5991/5991 co-relation queries the response was YES. [2021-10-15 19:57:07,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7713 conditions, 2699 events. 469/2699 cut-off events. For 5991/5991 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13631 event pairs, 0 based on Foata normal form. 2/2701 useless extension candidates. Maximal degree in co-relation 3105. Up to 1402 conditions per place. [2021-10-15 19:57:07,127 INFO L132 encePairwiseOnDemand]: 270/327 looper letters, 498 selfloop transitions, 226 changer transitions 0/730 dead transitions. [2021-10-15 19:57:07,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 730 transitions, 7799 flow [2021-10-15 19:57:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2021-10-15 19:57:07,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2021-10-15 19:57:07,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2021-10-15 19:57:07,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2021-10-15 19:57:07,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:07,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2021-10-15 19:57:07,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 19:57:07,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:07,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:07,138 INFO L186 Difference]: Start difference. First operand has 150 places, 545 transitions, 5340 flow. Second operand 3 states and 398 transitions. [2021-10-15 19:57:07,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 730 transitions, 7799 flow [2021-10-15 19:57:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 730 transitions, 7528 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:57:07,201 INFO L242 Difference]: Finished difference. Result has 153 places, 603 transitions, 6850 flow [2021-10-15 19:57:07,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6850, PETRI_PLACES=153, PETRI_TRANSITIONS=603} [2021-10-15 19:57:07,203 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -42 predicate places. [2021-10-15 19:57:07,203 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 603 transitions, 6850 flow [2021-10-15 19:57:07,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:07,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:07,204 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:57:07,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -375272296, now seen corresponding path program 1 times [2021-10-15 19:57:07,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:07,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310975563] [2021-10-15 19:57:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:07,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-10-15 19:57:07,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:07,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310975563] [2021-10-15 19:57:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310975563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:07,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825054974] [2021-10-15 19:57:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:07,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:07,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:07,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:07,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:57:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 19:57:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825054974] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:08,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:08,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050485732] [2021-10-15 19:57:08,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:08,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:08,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:08,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 603 transitions, 6850 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 19:57:08,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:08,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:08,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:10,360 INFO L129 PetriNetUnfolder]: 361/2982 cut-off events. [2021-10-15 19:57:10,360 INFO L130 PetriNetUnfolder]: For 8877/8877 co-relation queries the response was YES. [2021-10-15 19:57:10,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8085 conditions, 2982 events. 361/2982 cut-off events. For 8877/8877 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 17141 event pairs, 0 based on Foata normal form. 175/3157 useless extension candidates. Maximal degree in co-relation 3533. Up to 1594 conditions per place. [2021-10-15 19:57:10,371 INFO L132 encePairwiseOnDemand]: 267/327 looper letters, 0 selfloop transitions, 0 changer transitions 620/620 dead transitions. [2021-10-15 19:57:10,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 620 transitions, 6852 flow [2021-10-15 19:57:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2021-10-15 19:57:10,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40468909276248727 [2021-10-15 19:57:10,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2021-10-15 19:57:10,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2021-10-15 19:57:10,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:10,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2021-10-15 19:57:10,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 19:57:10,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:10,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:57:10,382 INFO L186 Difference]: Start difference. First operand has 153 places, 603 transitions, 6850 flow. Second operand 3 states and 397 transitions. [2021-10-15 19:57:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 620 transitions, 6852 flow [2021-10-15 19:57:10,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 620 transitions, 6522 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:10,430 INFO L242 Difference]: Finished difference. Result has 151 places, 0 transitions, 0 flow [2021-10-15 19:57:10,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=151, PETRI_TRANSITIONS=0} [2021-10-15 19:57:10,431 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:57:10,431 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 0 transitions, 0 flow [2021-10-15 19:57:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 19:57:10,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:57:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:10,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:10,666 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:57:10,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:57:10 BoogieIcfgContainer [2021-10-15 19:57:10,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:57:10,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:57:10,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:57:10,673 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:57:10,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:56:57" (3/4) ... [2021-10-15 19:57:10,677 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:57:10,710 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:57:10,712 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:57:10,714 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:10,715 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:10,930 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:57:10,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:57:10,933 INFO L168 Benchmark]: Toolchain (without parser) took 16490.23 ms. Allocated memory was 117.4 MB in the beginning and 222.3 MB in the end (delta: 104.9 MB). Free memory was 80.6 MB in the beginning and 98.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 86.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,933 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 89.6 MB in the beginning and 89.5 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:57:10,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 724.26 ms. Allocated memory is still 117.4 MB. Free memory was 80.3 MB in the beginning and 75.5 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 122.59 ms. Allocated memory is still 117.4 MB. Free memory was 75.5 MB in the beginning and 69.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,935 INFO L168 Benchmark]: Boogie Preprocessor took 107.65 ms. Allocated memory is still 117.4 MB. Free memory was 69.8 MB in the beginning and 65.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,935 INFO L168 Benchmark]: RCFGBuilder took 1612.07 ms. Allocated memory is still 117.4 MB. Free memory was 65.6 MB in the beginning and 63.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,936 INFO L168 Benchmark]: TraceAbstraction took 13653.86 ms. Allocated memory was 117.4 MB in the beginning and 222.3 MB in the end (delta: 104.9 MB). Free memory was 63.7 MB in the beginning and 112.3 MB in the end (delta: -48.5 MB). Peak memory consumption was 115.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,937 INFO L168 Benchmark]: Witness Printer took 258.07 ms. Allocated memory is still 222.3 MB. Free memory was 112.3 MB in the beginning and 98.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:10,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 89.6 MB in the beginning and 89.5 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 724.26 ms. Allocated memory is still 117.4 MB. Free memory was 80.3 MB in the beginning and 75.5 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 122.59 ms. Allocated memory is still 117.4 MB. Free memory was 75.5 MB in the beginning and 69.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 107.65 ms. Allocated memory is still 117.4 MB. Free memory was 69.8 MB in the beginning and 65.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1612.07 ms. Allocated memory is still 117.4 MB. Free memory was 65.6 MB in the beginning and 63.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13653.86 ms. Allocated memory was 117.4 MB in the beginning and 222.3 MB in the end (delta: 104.9 MB). Free memory was 63.7 MB in the beginning and 112.3 MB in the end (delta: -48.5 MB). Peak memory consumption was 115.8 MB. Max. memory is 16.1 GB. * Witness Printer took 258.07 ms. Allocated memory is still 222.3 MB. Free memory was 112.3 MB in the beginning and 98.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 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: 564]: 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, 198 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 72.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13567.9ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 10319.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 212.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 415 SDtfs, 1031 SDslu, 0 SDs, 0 SdLazy, 2819 SolverSat, 589 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3586.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6850occurred in iteration=7, InterpolantAutomatonStates: 25, 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: 154.9ms SsaConstructionTime, 417.2ms SatisfiabilityAnalysisTime, 1850.4ms InterpolantComputationTime, 1445 NumberOfCodeBlocks, 1445 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1436 ConstructedInterpolants, 0 QuantifiedInterpolants, 3031 SizeOfPredicates, 0 NumberOfNonLiveVariables, 459 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 9 InterpolantComputations, 8 PerfectInterpolantSequences, 520/526 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:57:11,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd4433a-afae-4250-9655-d850bba583d8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...